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DULCOTEST® pH Sensors

Graduated pH measuring ranges 0 – 14

pH measurements with DULCOTEST® sensors: Precise, reliable and application-adapted measured values in real time. Control, regulate and monitor chemical processes with the aid of precise measured values.

Product description

Reliable online measurement of pH values – with DULCOTEST® sensors

The online measurement and adjustment of pH values must be as accurate, fast and reliable as possible, with high availability of the measured values, whether for the monitoring, control or regulation of chemical processes.

Our product line of DULCOTEST® pH sensors provides a wide range of pH sensors for different measuring tasks.

The production of our pH sensors is subject to very strict quality controls (e.g. in accordance with RoHS guidelines). Routine steps are automated but critical steps are carried out manually under expert supervision. In this way we achieve optimum reproducible quality and cost reduction.

Your benefits

  • Precise and reliable pH measurement enables efficient processes and maximum process reliability
  • The wide choice of sensor types with different constructions makes them reliable components in many applications
  • A long service life is achieved through the use of the best quality materials for the glass and diaphragms, a stable reference system and optimised production. This minimises both downtime and maintenance
  • With short storage times and fast delivery, your pH sensors can be up and running very quickly and you can make maximum use of their service life (all glass sensors start to age as soon as they leave production)
  • Wide range of special versions for fitting length, cable length and plugs for made-to-measure connection to your process
  • Unique label for OEM partners

Field of application

  • Chemical processes
  • Chemically contaminated water
  • Swimming pool water, potable water
  • Process water
  • Cooling water, waste water
  • Seawater
  • Suspensions, sludge, emulsions
  • Exhaust air scrubber, semiconductor industry, electroplating
    1 2 3 4 5 6 7 8 9 10 11

    Technical Details

    • Selection of sensor type according to the application
    • The insertion angle must be > 15° from the horizontal (except with PHEK-L: horizontal to vertical)
    • Maximum flow < 0.8 m/s
    • With cable lengths > 10 m, use the 4-20 mA transducer type PHV1
    • Calibration using quality buffer solutions

    pH Sensor PHES 112 SE

    pH sensor optimised for use in potable water treatment, swimming pools/hot tubs at up to 60 °C/3 bar

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Diaphragm and reference system optimised for use in swimming pools and for potable water
    • Ceramic diaphragm with special material, optimised size and optimised pore diameter
    • Long service life due to reduced diffusion ("bleeding") of the electrolyte
    • Long service life due to the material, which is inert to aggressive disinfectants
    • Stable reference system
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range1 … 12
    Temperature0 … 60 °C
    Max. pressure3.0 bar
    Min. conductivity150 µS/cm
    ElectrolyteGel containing potassium chloride
    DiaphragmCeramic
    Sensor shaftGlass
    Shaft diameter12 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsSwimming pools, whirlpools, potable water
    Resistance toDisinfectant
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm, separate temperature measurement for temperature compensation needed
    Fitting lengthOrder no.
    PHES-112-SE SLg100100 ±3 mm1051745
    PHES 112 SE120 ±3 mm150702
    PHES-112-SE SLg225 225 ±3 mm150092

    pH Sensor PHES 112 SE 3D

    pH sensor optimised for use in potable water treatment, swimming pools/hot tubs and at low electrolytic conductivities of up to 60 °C/3 bar

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Diaphragm and reference system optimised for use in swimming pools
    • Ceramic diaphragm with special material, optimised size and optimised pore diameter
    • Three ceramic diaphragms optimised for low electrolytic conductivities
    • Long service life due to reduced diffusion ("bleeding") of the electrolyte
    • Long service life due to the material, which is inert to aggressive disinfectants
    • Stable reference system
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range1 … 12
    Temperature0 … 60 °C
    Max. pressure3.0 bar
    Min. conductivity50 µS/cm
    ElectrolyteGel containing potassium chloride
    Diaphragm3 Ceramic diaphragms
    Sensor shaftGlass
    Shaft diameter12 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsLow conductivity water
    Resistance toDisinfectant
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm, separate temperature measurement for temperature compensation needed
    Fitting lengthOrder no.
    PHES 112 SE 3D120 ±3 mm1045759

    pH Sensor PHEP 112 SE

    pH sensor optimised for use with clear process water and conditions of up to 80 °C/6 bar

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Diaphragm and reference system optimised for exacting process requirements
    • Ceramic diaphragm with special material, optimised size and optimised pore diameter
    • Long service life due to reduced diffusion ("bleeding") of the electrolyte
    • Long service life due to the material, which is inert to aggressive disinfectants
    • Stable reference system for high pressure/temperature requirements
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range1 … 12
    Temperature0 … 80 °C
    Max. pressure6.0 bar
    Min. conductivity150 µS/cm
    ElectrolyteGel containing potassium chloride
    DiaphragmCeramic
    Sensor shaftGlass
    Shaft diameter15 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsSwimming pools during pressurisation for higher temperatures and pressures, potable and industrial water, electroplating, chemical industries
    Resistance toDisinfectant
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm, separate temperature measurement for temperature compensation needed
    Fitting lengthOrder no.
    PHEP 112 SE120 ±3 mm150041

    pH Sensor PHEP-H 314 SE

    pH sensor optimised for use with clear process water, specifically for alkaline process solutions at high temperatures of up to 100 °C

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Diaphragm and reference system optimised for exacting process requirements
    • Optimised pH-sensitive glass for high alkali content and high temperatures
    • Long service life / excellent precision: Measurement at a high pH value of up to 14
    • Long service life: at high temperatures of up to 100 °C
    • Stable reference system for high pressure / temperature requirements
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range3 … 14 (Note: use below pH 3 shortens the service life)
    Temperature0 … 100 °C
    Max. pressure6.0 bar up to 25 °C, 3.0 bar up to 100 °C
    Min. conductivity150 µS/cm
    ElectrolyteGel containing potassium chloride
    DiaphragmCeramic
    Sensor shaftGlass
    Shaft diameter15 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsMonitoring or control of chemical processes with neutral to highly-alkaline media and temperatures up to 100 °C
    Resistance toDisinfectant, high alkalinity
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, highly alkaline tempered glass, ceramic diaphragm, gel electrolyte, separate temperature measurement for temperature compensation needed
    Order no.
    PHEP-H 314 SE1024882

    pH Sensor PHER 112 SE

    pH sensor optimised for use in contaminated water containing solids and for low conductivity of > 50 μS/cm at up to 80 °C/6 bar

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • The large dirt-repellent Teflon® diaphragm prevents the reference system from becoming blocked up
    • Long service life when solids are present
    • High-viscosity electrolyte combined with a salt reservoir prevents the electrolyte from "bleeding"
    • Long service life without drifts when there is clear water with low conductivity
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range1 … 12
    Temperature0 … 80 °C
    Max. pressure6.0 bar
    Min. conductivity50 µS/cm
    ElectrolyteWith KCI supply (salt rings in the reference electrolyte)
    DiaphragmPTFE ring diaphragm
    Sensor shaftGlass
    Shaft diameter12 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsMunicipal and industrial waste water, cooling water, industrial water, water in chemicals industry and paper production, generally for water with a solid matter fraction, water with low conductivity, e.g. from reverse osmosis.
    Resistance toDisinfectant, solids content (turbid types of water)
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, Teflon ring diaphragm, polymer electrolyte, separate temperature measurement for temperature compensation needed
    Order no.
    PHER 112 SE1001586

    pH Sensor PHEX 112 SE

    pH sensor optimised for use with contaminated water with a high solids content at 6 bar/100 °C or 16 bar/25 °C

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Diaphragm and reference system optimised for extremely high solids content
    • The solid electrolyte makes the diaphragm redundant and prevents the reference system from becoming blocked up
    • Long service life when sludge is present due to lack of a diaphragm
    • Long service life as the solid electrolyte prevents the electrolyte from "bleeding"
    • Stable reference system
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range1 … 12
    Temperature0 … 100 °C
    Max. pressure16.0 bar up to 25 °C, 6.0 bar up to 100 °C
    Min. conductivity500 µS/cm
    ElectrolytePolymer containing potassium chloride (solid)
    DiaphragmCircular gap diaphragm (solid electrolyte)
    Sensor shaftGlass
    Shaft diameter12 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsWaste water, industrial water, process chemistry, emulsions, suspensions, protein-containing media, in general for water with a high solid fraction, not suitable for use in clear water.not suitable for media with oxidation agents
    Resistance toSolids content (turbid types of water), sludge, emulsions
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, no diaphragm, polymer electrolyte, separate temperature measurement for temperature compensation needed
    Fitting lengthOrder no.
    PHEX 112 SE120 ±3 mm305096
    PHEX 112 SE225 ±3 mm150061

    pH Sensor PHED 112 SE

    pH sensor optimised for use with chemically contaminated but clear water at up to 80 °C/8 bar

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Diaphragm and reference system optimised for use in chemically contaminated but clear water
    • Double junction: two coupled ceramic diaphragms protect the reference system
    • Long service life when chemical pollutants are present
    • Special construction permits a maximum pressure of 8 bar
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range1 … 12
    Temperature0 … 80 °C
    Max. pressure8.0 bar
    Min. conductivity150 µS/cm
    ElectrolyteGel containing potassium chloride
    DiaphragmDouble junction
    Sensor shaftGlass
    Shaft diameter12 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsChemically loaded waste water, industrial water, cooling water
    Resistance toDisinfectants, water-soluble chemicals
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, double junction, gel electrolyte, separate temperature measurement for temperature compensation needed
    Order no.
    PHED 112 SE741036

    pH Sensor PHEF 012 SE

    pH sensor optimised for use with acidic water containing fluoride and abrasive water containing solids at up to 50 °C/7 bar

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Optimised pH glass for use in the presence of glass-corroding hydrofluoric acid (HF). HF is formed primarily in the presence of fluoride (F-) at a pH of < 4. Glass corrosion is promoted by a constant concentration of fluoride, a falling pH value and a rising temperature. The glass composition and structure of the PHEF type reduce the release of SiF4. Extended service life in the presence of fluoride (F-) at a pH of < 7
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • The flat shape of the glass diaphragm and large ring diaphragm facilitate use in contaminated water, which also contains abrasive solids
    pH range0 … 12
    Temperature0 … 50 °C
    Max. pressure7.0 bar
    Min. conductivity150 µS/cm
    ElectrolyteGel containing potassium chloride
    DiaphragmHDPE ring diaphragm, flat (Double Junction)
    Sensor shaftEpoxy
    Shaft diameter12 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsA significantly longer service life can be achieved compared with standard pH sensors in media containing hydrofluoric acid, e.g. waste water from the semiconductor industry or electroplating applications and air scrubbers
    Resistance toDisinfectant, solids content (turbid types of water), hydrofluoric acid (HF), abrasive particles
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, PE ring diaphragm, HF-compatible flat glass diaphragm, gel electrolyte, separate temperature measurement for temperature compensation needed
    Order no.
    PHEF 012 SE1010511

    pH Sensor PHEN 112 SE

    Refillable pH sensor optimised for use with chemically contaminated water at up to 80 °C/without excess pressure

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Renewable liquid electrolyte by continuous replenishment from an electrolyte bottle installed above the electrode
    • 1 ceramic diaphragm made of special material and with an optimised size / with optimised pore diameter
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Long service life in the presence of chemicals dissolved in the water, which could contaminate the reference system
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range1 … 12
    Temperature0 … 80 °C
    Max. pressureAtmospheric pressure
    Min. conductivity150 µS/cm
    ElectrolyteKCL electrolyte, refillable
    DiaphragmCeramic
    Sensor shaftGlass
    Shaft diameter12 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsWaste water, cooling waterchemically contaminated water
    Resistance toDisinfectant, only for clear types of water
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, liquid electrolyte, 1 ceramic diaphragm, separate temperature measurement for temperature compensation needed
    Order no.
    PHEN 112 SE305090

    Supplied without PE storage tank and tube

    Order no.
    PE storage tank with connectors and tube305058

    We recommend installation approx. 0.5-1 m above the sample fluid level

    CapacityOrder no.
    ml
    KCl solution, 3 molar250791440
    KCl solution, 3 molar1,000791441

    pH Sensor PHEN 112 SE 3D

    Refillable pH sensor optimised for use in contaminated water containing solids and water with a low conductivity of > 50 μS/cm at up to 80 °C/without overpressure

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Renewable liquid electrolyte by continuous replenishment from an electrolyte bottle installed above the electrode
    • 3 ceramic diaphragms made of special material, with optimised size and optimised pore diameter
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Long service life in water with low conductivity > 50 µS/cm and where solids are present
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range1 … 12
    Temperature0 … 80 °C
    Max. pressureAtmospheric pressure
    Min. conductivity50 µS/cm
    Electrolyte3 molar potassium chloride solution, refillable
    Diaphragm3 ceramic diaphragms
    Sensor shaftGlass
    Shaft diameter12 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsWaste water, water with low conductivity, e.g. from reverse osmosis.
    Resistance toDisinfectant, solids content (turbid types of water)
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, liquid electrolyte, 1 ceramic diaphragm, separate temperature measurement for temperature compensation needed
    Order no.
    PHEN 112 SE 3D150078

    pH Sensor PHEN 012 SL

    Refillable pH sensor for use with manual measuring instruments, optimised for clear and also chemically contaminated water at up to 80 °C/without overpressure

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Renewable liquid electrolyte by continuous replenishment from an electrolyte bottle installed above the electrode
    • 1 ceramic diaphragm made of special material and with an optimised size / with optimised pore diameter
    • Long service life in the presence of dissolved chemicals, which could contaminate the reference system
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range0 … 12
    Temperature0 … 80 °C
    Max. pressureAtmospheric pressure
    Min. conductivity150 µS/cm
    ElectrolyteKCl electrolyte, refillable
    DiaphragmCeramic
    Sensor shaftGlass
    Shaft diameter12 mm
    Fitting length160 ±3 mm
    Fitting positionVertical up to +25°
    ThreadNone
    Electrical connectionSN6 plug-in head
    Enclosure ratingIP 65
    InstallationImmersion by tripod or manually
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsManual measurements in laboratories
    Resistance toDisinfectants, water-soluble chemicals
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, liquid electrolyte, 1 ceramic diaphragm, separate temperature measurement for temperature compensation needed
    Order no.
    PHEN 012 SL305078

    pH Sensor PHEN 012 SL 3D

    Refillable pH sensor for use with manual measuring instruments, optimised for contaminated water containing solids and with a low conductivity of > 50 μS/cm at up to 80 °C/without overpressure

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Renewable liquid electrolyte by continuous replenishment from an electrolyte bottle installed above the electrode
    • 3 ceramic diaphragms made of special material and with an optimised size / with optimised pore diameter
    • Long service life in water with low conductivity > 50 µS/cm and where solids are present
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range0 … 12
    Temperature0 … 80 °C
    Max. pressureAtmospheric pressure
    Min. conductivity50 µS/cm
    Electrolyte3 molar potassium chloride solution, refillable
    Diaphragm3 ceramic diaphragms
    Sensor shaftGlass
    Shaft diameter12 mm
    Fitting length160 ±3 mm
    Fitting positionVertical up to +25°
    ThreadNone
    Electrical connectionSN6 plug-in head
    Enclosure ratingIP 65
    InstallationImmersion by tripod or manually
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsLaboratories, water with low conductivity, e.g. from reverse osmosis.Waste water
    Resistance toDisinfectant, solids content (turbid types of water)
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, liquid electrolyte, 3 ceramic diaphragms, separate temperature measurement for temperature compensation needed
    Order no.
    PHEN 012 SL 3D791508

    pH Sensor PHEK 112 S

    pH sensor for use with manual measuring instruments, with plastic shaft, optimised for use in potable water treatment, swimming pools/hot tubs at up to 80 °C/3 bar

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Diaphragm and reference system optimised for use in swimming pools and for potable water
    • Ceramic diaphragm with special material, optimised size and optimised pore diameter
    • With plastic shaft to prevent glass breakage
    • Mechanical protection of the glass diaphragm
    • Long service life due to reduced diffusion ("bleeding") of the electrolyte
    • Long service life due to the material, which is inert to aggressive disinfectants
    • Stable reference system
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range1 … 12
    Temperature0 … 60 °C
    Max. pressure3.0 bar
    Min. conductivity150 µS/cm
    ElectrolyteGel containing potassium chloride
    DiaphragmCeramic
    Sensor shaftPolycarbonate
    Shaft diameter12 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadNone
    Electrical connectionSN6 plug-in head
    Enclosure ratingIP 65
    InstallationImmersion by tripod or manually
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsHand-held measurement in swimming pools, potable water
    Resistance toDisinfectant
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm, separate temperature measurement for temperature compensation needed
    Order no.
    PHEK 112 S305051

    pH Sensor PHEK 112 SE

    pH sensor with plastic shaft, optimised for use in potable water treatment, swimming pools/hot tubs at up to 60 °C/3 bar

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Diaphragm and reference system optimised for use in swimming pools and for potable water
    • Ceramic diaphragm with special material, optimised size and optimised pore diameter
    • With plastic shaft to prevent glass breakage
    • Mechanical protection of the glass diaphragm
    • Long service life due to reduced diffusion ("bleeding") of the electrolyte
    • Long service life due to the material, which is inert to aggressive disinfectants
    • Stable reference system
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range1 … 12
    Temperature0 … 60 °C
    Max. pressure3.0 bar
    Min. conductivity150 µS/cm
    ElectrolyteGel containing potassium chloride
    DiaphragmCeramic
    Sensor shaftPolycarbonate
    Shaft diameter12 mm
    Fitting length120 ±3 mm
    Fitting positionVertical up to +25°
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsSwimming pools, potable water, aquaria
    Resistance toDisinfectant
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm, separate temperature measurement for temperature compensation needed
    Order no.
    PHEK 112 SE1028457

    pH Sensor PHEK-L 112 SE

    pH sensor with plastic shaft, optimised for use in potable water treatment, swimming pools/hot tubs, horizontal installation possible, at up to 60 °C/3 bar

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • With plastic shaft to prevent glass breakage
    • Horizontal (level) installation possible (90° angle) (usually limited to 0 - 75° angle)
    • Diaphragm and reference system optimised for use in swimming pools and for potable water
    • Ceramic diaphragm with special material and optimised size / optimised pore diameter
    • Long service life due to reduced diffusion ("bleeding") of the electrolyte
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Long service life due to the material, which is inert to aggressive disinfectants
    • Stable reference system
    pH range1 … 12
    Temperature0 … 60 °C
    Max. pressure3.0 bar
    Min. conductivity150 µS/cm
    ElectrolyteGel containing potassium chloride
    DiaphragmCeramic
    Sensor shaftPolycarbonate
    Shaft diameter12 mm
    Fitting length120 ±3 mm
    Fitting positionVertically to horizontally
    ThreadPG 13.5
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsSwimming pools, potable water, aquaria. Horizontal installation possible.
    Resistance toDisinfectant
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm, separate temperature measurement for temperature compensation needed
    Order no.
    PHEK-L 112 SE1034918

    pH Sensor PHEI 112 SE

    Reliable online measurement of pH values in industrial waste water/water – with DULCOTEST® sensors.

    Your benefits

    • Solid high-grade plastic housing with integrated process connection for direct installation in the process with ½" and ¾" NPT thread
    • Large dirt-repellent Teflon diaphragm protects against unwanted blocking of the reference
    • Double junction reference system for stability with chemically polluted water
    • Large electrolyte reservoir for long service lives
    pH range1 … 12
    Temperature0 … 80 °C
    Max. pressure6.0 bar
    Min. conductivity50 µS/cm
    Electrolytegel containing potassium chloride with a large KCI reservoir of gel
    DiaphragmPTFE ring diaphragm
    Sensor shaftPlastic
    Sensor shaft Ø17 ±0.2 mm (below the ½" NPT thread), 22 ±0.2 mm (below the ¾" thread)
    Fitting length20 ±0.2 mm (from the lower end of the ½" thread), 60 ±0.2 mm (from the lower end of the ¾" thread)
    Fitting positionVertical up to +25°
    Thread½" and ¾" NPT thread
    Electrical connectionSN6 plug-in head, rotatable with a ProMinent cable
    Enclosure ratingIP 65
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentAll DULCOMETER® controllers and solenoid-driven metering pumps types D_4a and delta®
    Typical applicationsMunicipal and industrial waste water Cooling water, Process water, Water in the chemical industry and paper making, generally for water with a solid matter fraction
    Resistance toDisinfectant, solids content (turbid water), water-soluble chemicals
    Measuring principle, technologydirect potentiometric measurement, 2 probes, double junction, gel electrolyte, large Teflon diaphragm, separate temperature measurement for temperature compensation needed
    Order no.
    PHEI 112 SE1076610

    pH Sensor PHEPT 112 VE

    pH sensor with integral temperature measurement, optimised for use with clear process water and changing process temperature of up to 80 °C/6 bar

    Your benefits

    • Electrochemical combination electrode: pH and reference electrode integrated
    • Diaphragm and reference system optimised for exacting process requirements
    • Ceramic diaphragm with special material, optimised size and optimised pore diameter
    • Long service life due to reduced diffusion ("bleeding") of the electrolyte
    • Long service life due to the material, which is inert to aggressive chemicals
    • Stable reference system for high pressure / temperature requirements
    • Integrated Pt 100 temperature sensor for temperature compensation of the pH measurement in higher-order measuring instruments eliminates the need for an additional sensor housing and external temperature sensor
    • Vario Pin plug-in head with IP 67 specification
    • Twist protection for the sensor cable connected. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding troublesome moisture on the connector contacts
    • Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
    pH range1 … 12
    Temperature0 … 80 °C
    Max. pressure6.0 bar
    Min. conductivity150 µS/cm
    Electrolytegel containing potassium chloride
    DiaphragmCeramic
    Sensor shaftGlass
    Shaft diameter15 mm
    Fitting length120 ±3 mm
    Fitting positionvertical up to +25°
    ThreadPG 13.5
    Electrical connectionVario Pin plug-in head
    Enclosure ratingIP 67
    InstallationBypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
    Measuring and control equipmentall DULCOMETER® controllers (with the exception of DCCa pH)
    Typical applicationsSwimming pools during pressurisation for higher temperatures and pressures, potable and industrial water, electroplating, chemical industry, processes with a temperature change.
    Resistance toDisinfectant
    Measuring principle, technologyDirect potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm, integrated temperature measurement for temperature compensation
    Order no.
    PHEPT 112 VE1004571

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    Overview

    Reliable online measurement of pH values – with DULCOTEST® sensors

    The online measurement and adjustment of pH values must be as accurate, fast and reliable as possible, with high availability of the measured values, whether for the monitoring, control or regulation of chemical processes.

    Our product line of DULCOTEST® pH sensors provides a wide range of pH sensors for different measuring tasks.

    The production of our pH sensors is subject to very strict quality controls (e.g. in accordance with RoHS guidelines). Routine steps are automated but critical steps are carried out manually under expert supervision. In this way we achieve optimum reproducible quality and cost reduction.

    Your benefits

    • Precise and reliable pH measurement enables efficient processes and maximum process reliability
    • The wide choice of sensor types with different constructions makes them reliable components in many applications
    • A long service life is achieved through the use of the best quality materials for the glass and diaphragms, a stable reference system and optimised production. This minimises both downtime and maintenance
    • With short storage times and fast delivery, your pH sensors can be up and running very quickly and you can make maximum use of their service life (all glass sensors start to age as soon as they leave production)
    • Wide range of special versions for fitting length, cable length and plugs for made-to-measure connection to your process
    • Unique label for OEM partners

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    Contact us

    Ralf Kiermaier

    Vice President Sales and Marketing, ProMinent GmbH

    »Please send us your request! We will contact you shortly.«

    +49 6221 842 0  Send request   

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