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

Rotronic Transmitter PF4/5

Overview

PF4/5 Differential-Pressure Transmitter

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

Technical specification

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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Rotronic Transmitter PF4/5

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