Pendulum room humidity sensor HYGRASGARD® RPFF-SD

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148,69 €
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Product group: WG01
Pendulum room humidity sensor HYGRASGARD® RPFF-SD
The calibratable HYGRASGARD® RPFF - SD pendulum humidity transmitter with plastic sinter filter measures the relative humidity of the air. It converts the measurand into a standard signal of 4...20 mA. Relative humidity (in % r.H.) is the quotient of water vapour partial pressure divided by the saturation vapour pressure at the respective gas temperature.
The measuring transducer is used in non-aggressive, dust-free environments, in refrigeration, air conditioning and cleanroom engineering, hotels, engineering rooms, meeting and conference facilities. It provides precise detection of humidity. A digital long-term stable sensor is used as measuring element for humidity. The sensor is suitable for duct installation, as a pendulum sensor, or for integration in equipment.
Technical details
Voltage supply
15...36 V DC
depending on working resistance, residual ripple stabilised ± 0.3 V
Power consumption
< 1.1 VA/ 24 V DC
Working resistance
Ra (Ohm) = (Ub -14 V)/ 0.03 A
Ra < 500 Ohm
Measuring range, humidity
0...100 % r. H.
(output corresponding to 4...20 mA)
Operating range, humidity
0...95 % r. H. (without dew formation)
Deviation of humidity
typical ± 2 % r. H. (20…80 % r. H. ); at + 25 °C, otherwise ± 3 %
4...20 mA
Sensor protection
plastic sinter filter, Ø 16 mm, L = 35 mm, exchangeable
(optional metal sinter filter, Ø 16 mm, L = 32 mm)
Ambient temperature
storage –25...+50 °C,
operation –5...+55 °C
Protective tube
stainless steelV2A (1.4301), Ø = 16 mm, L = 142 mm
Electrical connection
2-wire Connection,
0.14 - 1.5 mm²
sensor cable
PVC, LiYY, 2 x 0.25 mm²,
KL = approx. 1.5 m (other lengths optional)
Long-term stability
± 1 %/ year
Protection class
III (according to EN 60 730)
Protection type
IP 65 (according to EN 60 529)*
CE conformity,
according to EMC directive 2014/ 30/ EU,
according to EN 61326-1, according to EN 61326-2-3