Wireless Relative Humidity (RH) Transmitter - Up to 3 Mile Operation

  • $359.00
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Wireless Relative Humidity (RH) Transmitter - Up to 3 Mile Operation

Model: WSS-RH-900-RS

(Price shown includes RH Sensor, Wireless Transmitter and Wireless 4-20mA receiver)


  • Wireless Bridge Between RH Sensor & Process Instrument
  • Digital RH Sensor in Remote Sensor Design
  • Up To 3 Mile Line-of-site Transmit/Receive Distance
  • 3-95% Humidity Measurement Range
  • Accurate To +/- 3 % Relative Humidity
  • 12-24V DC, Hardwired, Battery or Solar Powered
  • Receiver Provides 4-20mA , 1-5V or 0-5V DC Analog Output
  • License Free Point-to-point Radio Operation


  • Laboratory and Research Facilities
  • Storage Room, Wine Cellar
  • Workplace Environmental Monitoring
  • Warehouse Monitoring


Model WSS-RH-900-RS Wireless Relative Humidity Transmitter provides a license free 900 MHz wireless bridge between RH sensor and process instrument at a distance up to 3-miles line-of-site (LOS). The sensor/wireless transmitter combination accomplishes Humidity measurement by providing a 4-20 mA / 1-5V DC, or 0-5V DC output on the wireless receiver side that corresponds to the % Humidity measured by the sensor. Connect the receiver output to a process instrument or PLC.

General Specifications
Radio Frequency: 900 MHz
RF Output Impedance: 50 Ohm nominal
Transmitter/Receiver Code Matching: Factory set
Wire Connections: Terminal Blocks (14 – 24 AWG)
Antennas: 5dBi Antenna (Included with system)
Transmit/Receive RF Distance:
Up to 1 Mile Line-of-sight (With Included 5dbi Antennas)
Up to 3 Miles Line-of-sight (With Optional Long Distance Antennas)

Wireless RH Transmitter Specifications

Humidity Measurement Range: 3 – 95% RH
Humidity Accuracy: +/- 3 % RH (10 to 90 %) @23ºC
Humidity Hysteresis: ± 1% RH
Ambient Operating Temperature:  -13 to 140 ºF (-25 to 60 ºC)
Hardwired: 12 to 24V DC @ 250mA
RF Power Output: 250mW
RF Data Rate: 250 Kbps
Enclosure: PCT NEMA 4X

Wireless Receiver Specifications
Operating Power: 12-24V DC @ 350mA
Operating Temperature: -10 to 130 ºF (-23 to 54 ºC)
Receive Sensitivity: -110 dBm
RF Input Impedance: 50 Ohm nominal
Analog Output: 4-20mA, 1-5VDC (Field Selectable)
Enclosure: NEMA 4X PCT 

Wireless Regulatory Approvals
Regulatory: FCC Part 15 (No license required)

IC (Canada) - 1846A-XB900HP

Standard Antennas are included with this system.

Note: The standard antennas included with this model allow for a maximum line-of-site (LOS) distance of 1 Mile. For greater distances up to 3 miles you will need the long distance antenna option. Order optional antenna model DRWC-900-LRANT.