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Differential pressure transmitter designed for air handling units, includes an air flow transmitter.

DPT-Dual-MOD-AHU is especially designed for air handling units, combining two differential pressure transmitters into one device. It offers a possibility to measure pressure from two different points. One of the measurements can be set to show the air flow rate. DPT-Dual-MOD-AHU has a Modbus interface and an Input terminal. When using the Input terminal, temperature transmitters can be replaced with temperature sensors. As a result, you will save in costs of the devices and in the installation costs.


DPT-Dual-MOD-AHU series devices include:
• Multiple measurement units, field selectable via menu, including: Pa, mbar, inchWC, mmWC and psi.
• Input terminal enabling reading of multiple other signals such as temperature or control relays over Modbus

Technical details

Communication: RS-485 Modbus (RTU)
Accuracy (from applied pressure): Sensor A (-700...7000 Pa):
Pressure < 125 Pa = 1.5 % + ±2 Pa
Pressure > 125 Pa = 1.5 % + ±1 Pa
Sensor B (-250...2500 Pa):
Pressure < 125 Pa = 1 % + ±2 Pa
Pressure > 125 Pa = 1 % + ±1 Pa
Zero point calibration: via Modbus or by pushbutton
Measuring units: Pressure: Pa, kPa, mbar, inchWC, mmWC, psi
Flow: m3/s, m3/hr, cfm, l/s, m/s, ft/min
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