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Advantages

  • Range 0…100 %RH
  • 2-wire current output
  • Great fast action and quick recovery
  • Minimized impact on installation capacities
  • Does not need user calibration
  • Plastic housing IP68
  • Sintered stainless protective filter

Description

The RHB is a probe for relative humidity of air and non-aggressive gases specially designed for low-budget applications in heating, ventilation and air conditioning systems, as well as in the food industry. The probe uses an integral humidity sensor based on the capacitive principle and a microelectronic unit that converts the measured humidity from 0 to 100 %RH into a standard current signal. Thanks to modern technological solutions, the RHB model has a very high speed, as well as a small and light body allowing easy and varied installation. If necessary, the probe can be equipped with a stainless sintered filter to protect against dirt and condensation. Thanks to its simple and robust design and low price, the RHB probe can be widely used in HVAC storage control systems as well as for some food industry applications.

Additional information

Аналогов вход

Solid-state sensor

Захранване

8…36 VDC

Аналогов изход

4…20 mA

RHB humidity sensor

Humidity

Technical Specifications
Input
Sensitive elementsolid-state sensor
Measurement range0…100 %RH
Time constant1 s
Recovery time (1)2 s
Output
Output signal4…20 mA, 2-wire
Maximum load750 Ω at 24V/20mA
Accuracy
Measurement error≤ 4.0% from span
Temperature drift0.06% from span for 1 °C
Hysteresis≤ 1.5 %RH
Self-heating error≤ 0.01 %RH/mA
Supply voltage dependence≤ 0.005 %RH/V
Power supply
Loop supply voltage8…36 VDC
Admissible variations1 Vp-p at 50 Hz
Operating conditions
Operating temperature-10…70 °C
Storage temperature-20…75 °C

 

Design and materials
Case materialPVC plastic
Sensor protectionplastic cap with stainless steel mesh
Sintered filter (option)stainless steel, 75 μm
Mountingfree (2)
Wiring1…10 m PVC cable, 2×0,5 mm2
Dimensionsmax. 18×150 mm (w/o cable)
Weightmax. 100 g (w/o cable)
Protection classIP68 (except sensor)

(1) 150 h at 100 %RH
(2) Small flanges for in-hole mounting can be ordered separately (see ‘Accessories’).