Relative Humidity Sensor

Model Number : Relative Humidity Sensor

The RH-5X is a low-cost continuous measurement relative humidity sensor. This sensor is compatible with NRG Systems' Symphonie data loggers equipped with an NRG iPack and Relative Humidity Signal Conditioning Module (SCM).

The RH-5X uses a polymer resistor sensor, which provides excellent linearity and sensitivity with fast response time and long-term stability. Mounts to underside of shelter box and includes 1.5 m (5 feet) of cable, mounting bracket, and one hose clamp.

Sensor type polymer resistor humidity sensor
  • wind resource assessment
  • meteorological studies
  • environmental monitoring
Sensor range 0 to 100% relative humidity
Instrument compatibility Symphonie with RH5 SCM + any iPack
Output signal
Signal type linear analog voltage
Transfer function % Relative Humidity = Voltage x 20
  • +/- 2% RH from 10% to 90% RH @ 25°C (77°F)
  • +/- 3% RH from 5% to 10% RH and 90% to 95% RH@ 25°C (77°F)
  • Contact Technical Support for information on additional uncertainty due to temperature effects.
Output signal range 0 to 5V for 0 to 100% RH, with a load resistance greater than 10 k ohms
Power requirements
Supply voltage 10 V to 30 V DC, 12 V at 2.6 mA typical
Mounting uses a sheet metal bracket with a hose clamp, to be mounted to the tower, under the shelter box
Tools required 8 mm (5/16 inch) nut driver or wrench
Operating temperature range -40°C to 70°C (-40°F to 158°F)
Operating humidity range 0 to 100% relative humidity
Connections wire leads, 3 conductor shielded cable:

  • Red: Power
  • Black:Ground
  • White: Signal out
Cable length 1.5 m (5 feet)
Weight 0.62 kg (1.36 pounds)
Dimensions 110 mm (4.3 inches) x 109 mm (4.3 inches) x 50 mm (2.0 inches) enclosure dimensions, without the bracket or shroud
Cable 3 conductor 22 AWG, with overall foil shield and drain wire, chrome PVC jacket
Enclosure polystyrene plastic box with galvanized steel mounting bracket

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