PF4/5 Differential-Pressure Transmitter
The new differential pressure transmitters PF4 and PF5 with two different sensor technologies (thermal measuring method in PF4 and diaphragm sensor in PF5) consistently produce perfect measurement results thanks to an integrated ambient pressure sensor. Both sensors are equipped with automatic zero point compensation. In the PF4, this is carried out automatically every 5 ms in the sensor, in the PF5 automatic compensation is performed with the help of an internal valve and programming in the HW4 V3.9.0. Both instruments can also be ordered with a HygroClip2 connection or a B4 connector for PT100. The new color display allows users to display up to 4 lines and a maximum of 3 measured values. All analog outputs, inputs and alarm settings can be changed via the intuitive menu. Thanks to analog and digital communication, both device types can be integrated easily into any monitoring system.
Advantages
- Flow or diaphragm differential pressure sensors
- 1 to 3 analog outputs, 1 analog input
- Network-compatible (Ethernet)
- Modbus capable TCP or RTU via RS485
- Potential-free relay with changeover contacts
Use cases
- Heating, ventilation, air-conditioning technology
- food industry
- pharmaceutical sector
- clean rooms
| Accuracy | ±1 hPa (0…65 °C; 950…1100 hPa) max. |
|---|---|
| Digital communication | Ethernet (TCP) / RS-485 (Modbus RTU) |
| Sensor type | PF4: Flow Sensor / PF5: Diaphragm Sensor |
| Influence line resistance RTD/resistance 3-wire | ±0.05 %FS/Ω |
| Range of application | -5…60 °C / 0…100 %RH, non-condensing |
| Rated current consumption | <300 mA @ 24 VDC |
| Resolution | 0 to 1 V 13 bit, otherwise 16 bit |
| Measurement range | PF4: ±10 Pa / ±25 Pa / ±50 Pa / ±100 Pa / ±250 Pa / ±500 Pa PF5: ±25 Pa / ±50 Pa / ±100 Pa / ±250 Pa / ±500 Pa |
| Pressure resistance | PF4: 5 bar, PF5: 0.7 bar |
| Zero point compensation | PF4: Automatic, every 5 ms in the sensor, PF5: Automatic, configurable via HW4 |
| Switch output | 1 relay potential-free change-over switch (NC - COM - NO) |
| Switching capacity | 30 VDC/1 A or 35 VAC/1 A |
| Power supply | 18…48 VDC / 16…35 VAC, (galvanically isolated), Optional: Power over Ethernet |
| Long-term stability | PF4: ±0.05 % FSS/year (typ.) / ±0.1 % FSS/year (max.) PF5: ±0.25 % FSS (typ.) per year @ ±250 and ±500 Pa measurement range ±0.3125 % FSS (typ.) per year @ ±100 Pa measurement range ±0.625 % FSS (typ.) per year @ ±50 Pa measurement range ±1.25 % FSS (typ. |
| Response time t 63 | < 1 s, typical |
| Display type | Color TFT display |
| Electrical connections | Screw terminals in housing |
| Analog outputs | Min. 1, max. 3, freely configurable |
| Min. / max. load voltage / current signal | > 1 kΩ/V (voltage output) / < 500 Ω (current output) |
| Fire protection class | Complies UL94-HB |
| Housing | ABS |
| Mounting | Wall Mounting |
| Evaluation software / Compatibility | ROTRONIC HW4 V3.9 |
| Analog input type | 0…10 V, input resistance >50 k 0…24 mA, measurement resistance 412.5 Ω |
| Analog input | 1, freely configurable |
| Analog output type | 0...1 V, 0...5 V, 0...10 V, 0...20 mA, 4...20 mA |
| Analog output accuracy (@ 23 °C) | Voltage output: ±1 mV/V Current output: ±20 μA |
| Ambient pressure dependence | PF4: Compensated, PF5: None |
| Dimensions | 129 mm x 72 mm x 45 mm |
| IP protection class | IP65 (without Ethernet) / IP40 (with Ethernet) |
| Maximum altitude | 2000 m ASL |
| Weight | 243 g with display & Ethernet |
| Working range - pressure | 300…1100 hPa |
| Working range - temperature | -5...65 °C |
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