The compact 2-wire transmitter – the link to the PLC and DULCOMETER®.
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.
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 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
Measuring technology in water treatment in the following sectors:
- Processes and process technology
- Food and beverage industry
- Chemical industry
- Pharmaceuticals
- Waste water treatment
- Power station technology
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 - 1200 … +1200 mV ORP voltage 0.01 … 50.0 mg/l chlorine -20 … +150 °C 1 µS/cm … 200 mS/cm (autoranging), corresponding to cell constant |
| Cell constant | 0.006 … 12.0/cm for conductivity |
| Resolution |
0.01 pH 1 mV 0.1% from measurement 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); imput resistance > 5 x 1011 Ω Chlorine terminal (DMT chlorine sensors) Pt 100/1000 terminal Conductivity terminal (2 or 4 wire connector) |
| Correction variable | Temperature via Pt 100/1000 (pH, chlorine, conductivity) |
| Correction range | Chlorine: 5 … 45 °C, pH: 0 … 100 °C, conductivity: 0 … 100 °C |
| Current output | 4…20 mA |
| Fault current | 23 mA |
| Feed voltage |
2-wire transmitter, 16 … 35 V DC, nominal 24 V PROFIBUS®-DP version, 16 … 30 V DC, nominal 24 V |
| Communication interface | PROFIBUS®-DP (wall-mounted version only) |
| Permissible ambient temperature | 0…55 °C |
| Climate | Relative humidity up to 95% (non-condensing) |
| Enclosure rating |
IP 65 (wall/pipe mounted) IP 54 (control panel installation) |
| Display | graphical display |
| Housing material | PPE |
| Dimensions H x W x D | 135 x 125 x 75 mm |
| Weight | 0.45 kg |
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