EU declaration conformity
Dual differential pressure transmitter | 0-1000 Pa | 24 VDC
HPD series measure differential pressure in two different locations simultaneously. The supply voltage is 24 VDC. The operating range is 0-1.000 Pa. Based on the K-factor of the fan, air volume flow is calculated. Air velocity readout is available by connecting external Pitot tube connection set: PSET-PTS-200. The measured values are transmitted via two outputs and via Modbus RTU. The output types are selectable: 0-10 VDC / 0-20 mA / 0-100 % PWM. All parameters can be adjusted via Modbus RTU. A typical application is to monitor the volume of the supplied and extracted air in a ventilation system or Air Handling Unit. The enclosure can be surface mounted and offers an IP65 protection against ingress of dust and moisture.
Additional specifications and description
This sensor measures differential pressure [Pa] in two different locations simultaneously. Based on the measurements, air volume flow [m³/hr] or air velocity [m/s] can be calculated. To calculate air volume flow based on the K-factor of the fan, use the optional connection set type PSET-PVC-200 or PSET-QF-200. This connection set can also be used to measure differential pressure. To calculate air volume flow based on the duct cross section [cm²] or air velocity [m/s], use the optional connection set type PSET-PTS-200 or PSET-PTL-200.
This sensor has two analogue outputs. Each output transmits the measured differential pressure, air volume flow or air velocity proportionally. The default range of this sensor is 0 to 1.000 Pa. By default, each output transmits 0 V at 0 Pa and 10 V at 1.000 Pa. This range, the output types and all other settings can be adjusted via Modbus RTU.
The supply voltage, both outputs and Modbus RTU communication can be connected via the screw clamp terminal block. The supply voltage is 24 VDC. The ground terminals of the power supply (V-) and output (GND) are internally not connected. This means that a 4-wire cable is required to connect this sensor. Most 24 VDC power supplies offer protection against short circuit, overload and overvoltage. A 24 VDC supply voltage increases the safety and reliability of your installation
The enclosure is made of high-quality r-ABS VO (UL94) plastic. This material is heat resistant, very tough and offers good protection against impacts. The pressure connection nozzles are made from Aluminium. The sensor enclosure offers an IP65 protection against ingress of dirt and water. This sensor can be wall-mounted.