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DULCOTEST® sensors for dissolved oxygen

Measuring ranges: 0.05 – 10 mg/l and 0.1 – 20 mg/l

Precise measurement of dissolved oxygen with DULCOTEST® sensors – very wide range of applications, from the monitoring of water rich in oxygen, such as surface water or potable water, to the reliable control of minimal oxygen concentrations when aerating aeration tanks in clarification plants.

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) or the oxygen saturation of water in %. The new type DO 3 is based on visual measurement of fluorescence and can be connected to the process in an immersion pipe or in a flow fitting. It can be used to monitor water rich in oxygen, such as surface water or potable water, as well as for controlling aeration of aeration tanks in clarification plants.

Your benefits

  • Efficient process management by precise online measurement in real-time
  • Versatile and optimised means of connecting sensors to the process
  • Minimal maintenance due to visual measuring principle with type DO 3
  • Maximum measuring sensitivity due to amperometric measuring principle with type DO 2
  • Integrated temperature measurement (Pt 1000) compensates for the influence of temperature
  • Diaphragm-covered electrodes for reduced dependence on flow and cross-sensitivities

Field of application

  • Waste water treatment: Optimisation of the oxygen input into the aeration tank (biological stage) of clarification plants for energy saving
  • Fish farming: Control of oxygen input in water that needs to be treated for aquaculture
  • Potable water supply: Optimisation of the aeration stage in waterworks
  • Environmental technology: Quality assessment of surface water

    Technical Details

    • Measuring accuracy: Type DO 2: ±0.05 mg/l , type DO 3: ±0.1 mg/l
    • Temperature: 0 … 50 °C
    • Max. pressure: Type DO 2: 1 bar, type DO 3: 2 bar
    • Degree of protection: IP 68
    • Supply voltage: Type DO 2: 12 … 30 V DC, type DO 3: 18…30 V DC

    Dissolved oxygen sensor DO 3-mA

    Widely used sensor for the measurement of oxygen dissolved in water above 0.1 ppm to oxygen saturation. For installation in standard immersion pipes or in the bypass line of the process flow. Use in aeration tanks of clarification plants, waterworks, in fish breeding or to monitor surface water. Minimal maintenance due to visual measuring principle.

    Your benefits

    • Measured variable: Dissolved oxygen, minimal maintenance in contaminated water due to visual measuring principle
    • Factory calibration stable for a long time. Calibration only needed following replacement of the visual sensor cap
    • Rod-shaped construction for simple installation into standard immersion pipes and ProMinent bypass fittings
    • No flow dependence and minimised faults due to ingredients in the water due to the visual measuring principle of quenching
    • Long lifetime of fluorescence dye and simple replacement by replacement of the sensor cap

    Measured variable

    Dissolved oxygen

    Calibration

    On atmospheric oxygen or by reference measurement in the process water

    Measuring accuracy

    ±0.1 mg/l

    Response time sensor t90

    < 60 s at 25 °C from air to nitrogen

    Temperature

    0…50 °C

    Temperature correction

    integrated Pt1000, fed to the outside

    Max. pressure

    2.0 bar

    Flow

    Measurement even possible without flow

    Supply voltage

    18…30 V DC

    Electrical Connection

    Fixed lead, 10 m

    Output signal

    4… 20 mA assigned to the measuring range, temperature-corrected, calibrated and electrically isolated

    Enclosure rating

    IP 65

    Process integration

    a) Immersion by immersion pipe (PVC, d40/DN 32, provided by the customer). The connection can be made using the immersion pipe adapter (reducing nipple, order no. 356924) and the 45° angle (order no. 356335). Both parts are included in the scope of delivery and can be ordered as an accessory (also see accessories).

    b) Installation into ProMinent bypass fittings, type DGMa with mounting kit G1” for 25 mm sensor (1113807), type DGMa with mounting kit 791818 and type DLG III with mounting kit 815079

    Controllers

    DACb from firmware 02.01.01.02With complete calibration functionality and all correction variables (temperature, salinity, air pressure, height above sea level). Displayed units: [ppm] and [% oxygen saturation]DACa, AEGIS II, D1C:Calibration only possible if a reference concentration determined from the process water is input. Only temperature correction variable. Displayed unit: [ppm]

    Typical applications

    Control of oxygen input into the aeration tank (clarification plant), control of oxygen input in water works, breeding of fish and shrimps, conditioning of the water of large aquaria in zoos, assessment of the biological condition of surface water.

    Resistance to

    Contaminated water and the following chemical compounds: carbon dioxide, hydrogen sulfide, sulfur dioxide, ethylene oxide and against gamma sterilisation.

    Interference by

    Oxidant (e.g. chlorine, chlorine dioxide, ozone) and many organic solvents (e.g. chloroform, toluene, acetone)

    Measuring principle, technology

    optical: Measurement of the relaxation time of a pulsed fluorescence beam

    Measuring range

    Order no.

    DO 3-mA-20 ppm

    0.10…20.0 mg/l

    1094609

    Downloads for DULCOTEST® sensors for dissolved oxygen

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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) or the oxygen saturation of water in %. The new type DO 3 is based on visual measurement of fluorescence and can be connected to the process in an immersion pipe or in a flow fitting. It can be used to monitor water rich in oxygen, such as surface water or potable water, as well as for controlling aeration of aeration tanks in clarification plants.

    Your benefits

    • Efficient process management by precise online measurement in real-time
    • Versatile and optimised means of connecting sensors to the process
    • Minimal maintenance due to visual measuring principle with type DO 3
    • Maximum measuring sensitivity due to amperometric measuring principle with type DO 2
    • Integrated temperature measurement (Pt 1000) compensates for the influence of temperature
    • Diaphragm-covered electrodes for reduced dependence on flow and cross-sensitivities

    Application

    Technical Data

    Downloads

    Contact us

    Wesley Sutton

    Managing Director, ProMinent Fluid Controls UK Ltd.

    »We are always available to help. Don't hesitate to contact us.«

    +44 1530 560 555  Send request   

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