Cost-efficient solution for monitoring cleanroom conditions

DPT-CR-MOD is a differential pressure transmitter designed specially for cleanroom monitoring. In addition to differential pressure, the device enables monitoring temperature and relative humidity. A 0…10 V voltage input of an external humidity and temperature transmitter (for example Siro-rH-T) can be connected to the input terminal of the device. In this case, all three measured values (differential pressure, relative humidity, temperature) can be shown simultaneously on the display. Alternatively, a passive temperature sensor can be connected to the input terminal. DPT-CR-MOD is compatible with Modbus serial communication protocol.


DPT-CR-MOD is used for monitoring and controlling differential pressure, relative humidity and temperature in cleanrooms.


DPT-CR-MOD measures the pressure difference between the cleanroom and the anteroom and sends the information to the automation system via Modbus to maintain optimal conditions in the cleanroom. DPT-CR-MOD is connected to the Siro indoor air quality transmitter that measures relative humidity and temperature. Siro sends the information to DPT-CR-MOD that shows it on its display, together with differential pressure measurement.

Technical details

Communication: RS-485 Modbus (RTU)
Accuracy (from applied pressure): Pressure < 125 Pa = 1 % + ±2 Pa
Pressure > 125 Pa = 1 % + ±1 Pa
Zero point calibration: by pushbutton or via Modbus
Measuring units: Pressure: Pa, kPa, mbar, inchWC, mmWC, psi
Temperature: °C, °F
Supply voltage: 24 VDC ±10 % / 24 VAC ±10 %
Power consumption: < 1.3 W
Output signal: via Modbus
Operating temperature: -20…+50 °C
Response time: 1...20 s selectable via menu
Protection standard: IP54




Product series

Differential pressure transmitter

Model type

For cleanroom monitoring, with Modbus communication


With display