Series RHP Humidity/Temperature Transmitter

Passive Temperature Outputs, Sintered Filter Options

General Information :

The SERIES RHP Temperature and Humidity Transmitter combine the voltage or current humidity transmitter output with a passive temperature thermistor or RTD output. Featuring polymer capacitance humidity sensors, models are available in 2%, 3% or 5% accuracies. Duct mounted transmitters are available with an optional two-line alpha numeric LCD display.

For models with resistive thermistors or RTD outputs, please find temperature to resistance lookup tables.


Application Note:

For duct mount installations, the sintered filter option should be ordered for applications where the humidity transmitter is mounted in the supply air duct after the fan and cooling coils.

  • Air economizers
  • Outdoor temperature and relative humidity reference
  • Pool room humidity monitoring

Relative Humidity Range: 0 to 100% RH.
Temperature Range: -40 to 140°F (-40 to 60°C).
Accuracy, RH: RHP-2XXX ±2% 10 to 90% RH @ 25°C; RHP-3XXX ±3% 20 to 80% RH @ 25°C; RHP-5XXX ±5% 20 to 80% RH @ 25°C.
Accuracy, Thermistor Temp Sensor: ±0.2°C @ 25°C (±0.36°F @ 77°F).
Accuracy, RTD Temp Sensor: DIN Class B; ±0.3°C @ 0°C (±0.54°F @ 32°F).
Accuracy, Solid State Band Gap: ±0.9°F @ 77°F (±0.3°C @ 25°C).
Hysteresis ±1%.
Repeatability: ±0.1% typical.
Temperature Limits: -40 to 140°F (-40 to 60°C).
Storage Temperature: -40 to 176°F (-40 to 80°C).
Compensated Temperature Range: -4 to 140°F (-20 to 60°C).
4 to 20 mA Loop Powered Models: Power requirements: 10 to 35 VDC; Output signal: 4 to 20 mA.
0-5/10 V Output Models: Power requirements: 15 to 35 VDC or 15 to 29 VAC; Output signal: 0 to 10 V @ 5 mA max.
Solid State Band Gap Temp Sensor Output Ranges: Switch selectable, -20 to 140°F (-28.9 to 60°C); 0 to 100°F (-17.8 to 37.8°C); 40 to 90°F (4.4 to 32.3°C); -4 to 140°F (-20 to 60°C).
Response Time: 15 seconds.
Electrical Connections: Removable screw terminal block.
Conduit Connection: Duct Mount: 1/2″ NPS; OSA: 1/2″ (22.3 mm).
Drift: <1% RH/year.
RH Sensor: Capacitance polymer.
Temperature Sensor: >Types 1, 2, 3: Solid state band gap;

Curves A,B,C; Thermistor;

Curves D,E; Platinum RTD DIN 385. (See R-T Lookup Table).

Enclosure: Duct Mount: PBT; OSA: Polycarbonate.
Enclosure Rating: NEMA 4X (IP66) for OSA mount only.
Display: Duct Mount only, optional 2-line alpha numeric, 8 characters/line.
Display Resolution: RH: 0.1%; 0.1°F (0.1°C).
Weight: Duct Mount: .616 lb (.3 kg) OSA: 1 lb (.45 kg).
Agency Approvals: CE.

  • 2%, 3%, or 5% accuracy models
  • Optional LCD display on duct mount models
  • Radiation shield option for outdoor installation in direct sunlight



Catalog :

RHP Catalog 2016

CE Approval

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