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DULCOTEST® Sensors for Dissolved Oxygen

Graduated measuring ranges 0.1 – 20 mg/l

Measurement of dissolved oxygen with DULCOTEST® sensors – ideal for monitoring oxygen-rich waters such as surface or potable water.

Product description

Reliable online measurement of dissolved oxygen – with DULCOTEST® sensors

The measured variable "dissolved oxygen" indicates the volume of gaseous oxygen physically dissolved in the aqueous phase in mg/l (ppm). Our product line of DULCOTEST® sensors for "dissolved oxygen" provides two types of sensor with different structures and measuring ranges to perform measuring tasks. Type DO1 can be connected to the process in an immersion pipe or in-line probe and is used for measurement and control in the monitoring of more oxygen-rich waters such as surface water or potable water.

Type DO2 is integrated in a floating ball and has been specially optimised for the control of lower oxygen concentrations in clarification plants.

Your benefits

  • Precise, real-time amperometric measurement for efficient process control
  • Amperometric measuring means no clouding or discolouration
  • Teflon diaphragm is not sensitive to dirt
  • Stable zero point by means of large diaphragm-covered electrodes
  • Integrated temperature compensation (Pt 1000) eliminates faults caused by influence of temperature
  • Diaphragm-covered electrodes for reduced dependence on flow and cross sensitivities

Field of application

  • Waste water treatment: Optimisation of oxygen input in the aeration tank (biological stage) of clarification plants
  • Fish farming: Control of oxygen input in waters which must be conditioned for aquaculture
  • Potable water supply: Optimisation of aeration stage in waterworks
  • Environmental technology: Quality assessment of surface waters

    Technical Details

    • Measuring accuracy: 0.5% of the upper range value
    • Temperature: 0º … 50º C
    • Max. pressure: 1.0 bar
    • Protection class: IP 68
    • Supply voltage: 12 … 30 V DC

    Oxygen Sensor DO 1-mA

    Sensor for the measurement of the dissolved oxygen above 2 ppm to oxygen saturation. For installation in standard immersion pipes or in the bypass line. Use in waterworks, in fish breeding or to monitor surface water

    Your benefits

    • Measured variable: dissolved oxygen, no interference by turbidity or discolouration by the amperometric measuring principle
    • Rod-shaped construction for simple installation into standard immersion pipes and bypass lines
    • Diaphragm-covered sensor minimises faults caused by changing flow or ingredients in the water
    • Minimal maintenance and long service life due to encapsulated transducer (easily replaceable thanks to bayonet fitting)
    • Measuring electrodes protected by pore-free, dirt-repellent diaphragm
    • Long service life of the electrolyte at high oxygen concentrations through optimised membrane thickness
    • Stable zero point by means of large diaphragm-covered electrodes
    Measured variableDissolved oxygen
    CalibrationOf oxygen in air
    Measuring accuracy±0.5% relative to final value of measuring range
    Response time sensor t90110 s
    Temperature0 … 50 °C
    Max. pressure1.0 bar
    Intake flow Minimum: 0.05 m/s
    Supply voltage12...30 V DC
    Electrical connectionFixed lead, 10 m
    Output signal4…20 mA ≈ measuring range, calibrated, temperature-compensated and electrically isolated
    Enclosure ratingIP 68
    Measuring and control equipmentD1Cb, DAC
    Process integration

    a) Immersion, suspended on cable with or without cable bracket (see accessories)

    b) Immersion with immersion pipe

    1. Immersion pipe with 50 mm outside diameter and 1-1/4 inch internal thread (provided by the customer). The connection is possible via an immersion pipe adapter (see accessories).

    2. PVC immersion pipe with 50 mm outside diameter (provided by the customer). The connection is made by adhesion via a standard PVC union (provided by the customer).

    c) In-flow operation on request

    Measuring and control equipmentD1Cb, DAC
    Typical applicationsFish and shrimp farming, conditioning of water in large aquaria in zoological parks, control of the oxygen input in waterworks, appraisal of the biological status of surface waters.
    Resistance toIngredients in the water, dirt films
    Measuring principle, technologyAmperometric, 2 electrodes, membrane-covered, encapsulated transducer
    Measuring rangeOrder no.
    DO 1-mA-20 ppm2.00…20.0 mg/l1020532

    Oxygen Sensor DO 2-mA

    Sensor for the measurement of the dissolved oxygen, specifically optimised for control above 0.1 ppm in the aeration tanks of clarification plants. Integrated in a floating ball with a cleaning function

    Your benefits

    • Measured variable: dissolved oxygen, no interference by turbidity or discolouration by the amperometric measuring principle
    • Integration of the encapsulated transducer in a specially-shaped floating ball., creating a Venturi flow, which helps to clean the sensor membrane
    • Diaphragm-covered sensor minimises faults caused by changing flow or ingredients in the water
    • Minimal maintenance and long service life due to encapsulated transducer (easily replaceable thanks to bayonet fitting)
    • Measuring electrodes protected by pore-free, dirt-repellent diaphragm
    • Long service life of the electrolyte at low to medium oxygen concentrations, as occur in the aeration tanks of clarification plants, by means of optimised membrane thickness
    • Stable zero point by means of large diaphragm-covered electrodes
    Measured variableDissolved oxygen
    CalibrationOf oxygen in air
    Measuring accuracy±0.5% relative to final value of measuring range
    Response time sensor t9022 s
    Temperature0 … 50 °C
    Max. pressure1.0 bar
    Intake flow Minimum: 0.05 m/s
    Supply voltage12...30 V DC
    Electrical connectionFixed lead, 10 m
    Output signal4…20 mA measuring range calibrated, temperature-corrected and electrically isolated
    Enclosure ratingIP 68
    Measuring and control equipmentD1Cb, DAC
    Process integration

    As a float with venturi grooves to increase the flow of sample water for the self-cleaning of the sensor part.

    Supplied with adapter for connection to PVC pipes with outside diameter: 50 mm and railing bracket, also for PVC pipes with outside diameter: 50 mm (see accessories).

    The customer must provide the straight PVC tube and a 45 ° standard elbow for gluing to PVC pipes (outside diameter 50 mm).

    Measuring and control equipmentD1Cb, DAC
    Typical applicationsControl of the oxygen input in activated sludge pools (sewage plant) for the purpose of energy conservation.
    Resistance toIngredients in the water, dirt films
    Measuring principle, technologyAmperometric, 2 electrodes, membrane-covered, encapsulated transducer integrated in ball float
    Measuring rangeOrder no.
    DO 2-mA-10 ppm0.10…10.0 mg/l1020533

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    Overview

    Reliable online measurement of dissolved oxygen – with DULCOTEST® sensors

    The measured variable "dissolved oxygen" indicates the volume of gaseous oxygen physically dissolved in the aqueous phase in mg/l (ppm). Our product line of DULCOTEST® sensors for "dissolved oxygen" provides two types of sensor with different structures and measuring ranges to perform measuring tasks. Type DO1 can be connected to the process in an immersion pipe or in-line probe and is used for measurement and control in the monitoring of more oxygen-rich waters such as surface water or potable water.

    Type DO2 is integrated in a floating ball and has been specially optimised for the control of lower oxygen concentrations in clarification plants.

    Your benefits

    • Precise, real-time amperometric measurement for efficient process control
    • Amperometric measuring means no clouding or discolouration
    • Teflon diaphragm is not sensitive to dirt
    • Stable zero point by means of large diaphragm-covered electrodes
    • Integrated temperature compensation (Pt 1000) eliminates faults caused by influence of temperature
    • Diaphragm-covered electrodes for reduced dependence on flow and cross sensitivities

    Application

    Technical Data

    Downloads

    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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