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Differential pressure transmitter | -125 to 125 Pa | PoM

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Article code HPS-M--LP
GTIN 0.540.100.300.784.6
Intrastat number
Category Differential pressure transmitters
Current stock 3 U.
Factory lead time 4 Week(s)

Product description

This HVAC sensor is designed for measuring differential pressure within the range of -125 to +125 Pa and operates with a supply voltage of 24 VDC, Power over Modbus or PoM - Modbus RTU communication and the supply voltage are connected via the RJ45 socket. Additionally, this sensor has the capability to measure air volume flow or air velocity.

The measured value is accessible through Modbus RTU communication. The differential pressure range and all other settings can be adjusted via Modbus RTU.

Additional specifications and description

Differential pressure, air volume flow or air velocity?
This sensor measures differential pressure [Pa]. Based on this measurement, 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 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 connection set type PSET-PTS-200 or PSET-PTL-200. Differential pressure sensor with Pitot tube
Visual indication
This pressure transmitter offers a clear, visual indication of the differential pressure level via the green, yellow and red LED. The green LED indicates that the pressure level is within range. When the pressure level enters the alert range, the yellow LED lights up. Red means: differential pressure out of range. The LEDs can also indicate the status of the air volume flow or air velocity. The second green LED indicates the sensor status. It is activated when power supply and Modbus RTU communication are enabled. 
Reduced installation time
One RJ45 connector is all it takes to connect this sensor! Modbus RTU communication and 24 VDC power supply are connected via one cable - we call it Power over Modbus or PoM. All measured values are available via Modbus RTU communication. To facilitate wiring, we recommend to use a Sentera 24 VDC power supply with RJ45 connector. These power supplies offer protection against short circuit, overload and overvoltage. A 24 VDC supply voltage increases the safety and reliability of your installation.
High quality
The enclosure is made of high-quality r-ABS VO (UL94) plastic. This material is very tough and offers good protection against impacts. The pressure connection nozzles are made from Aluminum. The sensor enclosure offers an IP65 protection against ingress of dirt and water. This sensor can be wall-mounted.
Monitor overpressure in staircases
A typical application for differential pressure sensors with this range is to monitor under or overpressure in staircases or cleanrooms.
For instance, by creating a constant overpressure in the staircase, it remains smoke-free in case of fire.

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