Demanding humidity/temperature applications require the Series RH Transmitter which offers high accuracy, long term stability, and reliable operation. The Series RH is designed for monitoring and controlling humidity or both humidity and temperature in building energy management systems, HVAC, commercial, residential, clean rooms, museums, climate chambers, and other space monitoring applications.

The Series RH is a two-wire transmitter with a 4-20 mA loop powered output. The state of the art sensor recovers from 100% saturation and is calibration-free. The Series RH is available in duct mount or OSA (outside air) models. Select humidity monitoring or humidity and temperature models.

The combined humidity/temperature version (RHT) provides dual 4-20 mA output signals to control both humidity and temperature with one sensor which reduces installation costs. The dual version is also available with an optional alpha-numeric LCD to provide local indication of humidity and temperature simultaneously. The displayed temperature is field selectable for °F or °C.

SPECIFICATIONS
Relative Humidity Range: 0 to 100% RH.
Temperature Range: -40 to 140°F (-40 to 60°C).
Accuracy: ±2% @ 10-90% RH; ±0.9°F @ 72°F (±0.3°C @ 25°C).
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).
Power Requirements: 10-35 VDC.
Output Signal: 4-20 mA, 2 channels for humidity/temperature models (loop powered on RH).
Response Time: 15 seconds.
Electrical Connections: 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: Solid state band gap.
Housing Material: Duct Mount: PBT; OSA: Polycarbonate.
Enclosure Rating: NEMA 4X (IP65) for OSA mount only.
Display: Optional 2-line alpha-numeric, 8 characters/line.
Display Resolution: RH: 0.1%; 0.1°F (0.1°C).
Weight: Duct Mount: 0.6 lb (0.3 kg); OSA: 1 lb (0.45 kg).
Agency Approvals: CE.