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Transmitter DULCOMETER® DMTa

The transmitter DULCOMETER® DMTa converts the sensor signals for pH, ORP value, chlorine concentration and conductivity into an interference-insensitive 4-20 mA analogue signal. Flexible, safe and always the optimum resolution of measured value.

Product description

The compact 2-wire transmitter – the link to the PLC and DULCOMETER®.

The 2-wire transmitter DMTa converts the following sensor signals into an interference-insensitive 4-20 mA analogue signal: pH, ORP, temperature, chlorine and conductivity.

It is fed via the 2-wire analogue input of a PLC or via a 2-wire analogue input of a ProMinent controller. The 4-20 mA analogue current proportional to the measured value is transmitted via the same two lines.

The DMTa offers an on-site calibration When a metering pump has been installed, the capacity in litres per hour has to be determined under ... more in the glossary option of the sensor and galvanic separation between the sensor input and measured value output.

Your benefits

  • Flexibility in the choice of measured variable with pH, ORP and temperature
  • Excellent operational safety, thanks to sensor monitoring (pH)
  • Galvanic isolation between the sensor and supply
  • Always the optimum measured value resolution by auto-ranging with conductivity measurement
  • Safety through sensor monitoring of pH for glass breakage and line breakage
  • Various installation options: wall-mounted, installation on an upright or in a control cabinet

Field of application

  • Process engineering
  • Food and beverage industry
  • Pharmaceuticals
  • Waste water treatment
  • Power station technology
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    Technical Details

    • Measured variables: pH, ORP, chlorine, temperature and conductivity
    • Accuracy: 0.5% of the upper range value
    • Correction variable: Temperature via Pt 100/Pt 1000 (pH, chlorine, conductivity)
    • Communication interface: PROFIBUS®-DP (wall-mounted only)
    • Protection class: IP 65 (wall-mounted, pipe installation), IP 54 (installation in a control cabinet)
    • Display: Graphic display

    Technical Data

    Measuring range

    pH - 1.00 … 15.00

    -1,200 … +1,200 mV redox potential

    0.01 … 50.0 mg/l chlorine

    -20 … +150 °C

    1 μS/cm … 200 mS/cm (auto-ranging), depending on the cell constant

    Cell constant

    0.006 … 12.0/cm for conductivity

    Resolution

    0.01 pH

    1 mV

    0.1 % of the measuring range for chlorine

    0.1 °C

    Conductivity 1/1000 of display value (min. 0.001 μS/cm)

    Accuracy

    0.5% from measurement range

    Measurement input

    mV terminal (pH, ORP); input resistance > 5 x 1011

    Chlorine terminal (DMT chlorine probes)

    Pt 100/1000 terminal

    Conductivity terminal (2 or 4-wire connection)

    Correction variable

    Temperature via Pt 100/1000 (pH, chlorine, conductivity)

    Correction range temp.

    Chlorine: 5 … 45 °C, pH: 0 … 100 °C, conductivity: 0 … 100 °C

    Min. current loop

    4 mA

    Max. current loop

    20 mA

    Fault current

    23 mA

    Feed voltage

    2-wire transmitter, 16... 35 V DC, 24 V nominal

    PROFIBUS® DP design, 16 … 30 V DC, 24 V nominal

    Communication interface

    PROFIBUS®-DP (wall-mounted version only)

    Min. ambient temperature

    0 °C

    Max. ambient temperature

    55 °C

    Climate

    Relative humidity up to 95% (non-condensing)

    Enclosure rating

    IP 65 (wall-mounted, pipe-mounted)

    IP 54 (installation in a control cabinet)

    Display

    graphical display

    Housing material

    PPE

    H dimension

    135 mm

    W dimension

    125 mm

    D dimension

    75 mm

    Weight

    0.45 kg

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    Overview

    The compact 2-wire transmitter – the link to the PLC and DULCOMETER®.

    The 2-wire transmitter DMTa converts the following sensor signals into an interference-insensitive 4-20 mA analogue signal: pH, ORP, temperature, chlorine and conductivity.

    It is fed via the 2-wire analogue input of a PLC or via a 2-wire analogue input of a ProMinent controller. The 4-20 mA analogue current proportional to the measured value is transmitted via the same two lines.

    The DMTa offers an on-site calibration When a metering pump has been installed, the capacity in litres per hour has to be determined under ... more in the glossary option of the sensor and galvanic separation between the sensor input and measured value output.

    Your benefits

    • Flexibility in the choice of measured variable with pH, ORP and temperature
    • Excellent operational safety, thanks to sensor monitoring (pH)
    • Galvanic isolation between the sensor and supply
    • Always the optimum measured value resolution by auto-ranging with conductivity measurement
    • Safety through sensor monitoring of pH for glass breakage and line breakage
    • Various installation options: wall-mounted, installation on an upright or in a control cabinet

    Application

    Technical Data

    Downloads

    Contact us

    ProMinent Fluid Controls Ltd.


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

    +1 888 709 9933  Send request   

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