• Compact enclosure
  • Resistant to volatile organic compounds
  • Highly stable
  • Field selectable outputs
  • 4-20mA, 0-1 VDC,0-5 VDC,
    0-10 VDC
  • Accuracy ±2% to ±5%
  • Humidity span 0% to 100%
  • Temperature options available
  • AC/DC operation
  • Temperature compensated
  • Fast response


The RH series transducers are intended specifically for use in environmental monitoring and control systems and comes in a variety of enclosures. Its state-of-the-art design combines microprocessor based linearization and temperature correction with a world class capacitance sensor. Reliability and accuracy for even the most critical of measurements.

Excellent long-term stability and quick response time combined with temperature compensation make the RH series transducers an ideal choice in the HVAC market. Various models offer accuracy within 2%, 3%, or 5%.

The RH100 Wall Mount comes in a very compact enclosure which mounts directly to a single electrical box. The RH200 Duct comes standard with a 230 mm (9-inch) stainless steel probe, and an ABS enclosure is provided for wire terminations. The RH300 OSA comes mounted in a weatherproof sun and wind shielded enclosure.

Temperature sensor options of RTD's and thermistors are available in all three configurations.


System Accuracy: ±2,3, or 5% RH, 5% to 95% RH
Operating Temp.: 0°C to 50°C (32°F to 122°F) - RH100
-40°C to 70°C (-40°F to 158°F) - RH200/RH300
Sensor Construction: Thermoset Polymer based capacitive
Protection: 60 micron HDPE cover
Repeatability: ±0.5% RH
Hysteresis: ±1% of span max
Linearity: ±0.5% RH typical
Response Time: 15 seconds @ 25°C
Stability: ±1% RH typical at 50% RH in 5 yrs.
Output Signal Types:
(jumper selectable)
4-20mA     Note: all output signals are
0-1 VDC    scaled 0-100%RH
0-5 VDC
0-10 VDC
Power Supply: 18 - 35 VDC at unit (Loop Powered)
18 - 32 VAC nominal ±10% (3-wire)
Wiring Connections: Screw Terminals (14 to 22 AWG)
Optional Temperature Sensor: 100 Ohm RTD, 1000 Ohm RTD,
thermistors and transmitters.



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