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RH+T Indicator


HT20 is a relative humidity and temperature indicator with a range from 0 to 100% RH and a temperature range of -20 to 100 °C. It receives input from Radix's SHT20, SHT30 (wall-mount) and SHT40(duct-mount) RH+T sensors which must be ordered separately and may be placed up to 50 meters from the unit. HT20 features a two-color dual LED display; the upper indicates relative humidity and the lower, temperature. This RH+T indicator is accurate to within 2% for humidity and within 0.5°C for temperature. HT20 transmits an isolated current (4-20 mA) or voltage (0-10 V DC) output signal to other devices such as a Programmable Logic Controller (PLC) or Solid-State Relay (SSR). Signal isolation protects your devices and machines downstream of our instruments from damaging fluctuations in the input signal. This product features Radix's proprietary sensor-break indication technology.

  • RH and T inputs from sensors
  • Accuracy: ± 2% RH, ± 0.5 °C
  • User programmable
  • 85 - 265 V AC SMPS
  • Isolated retransmission output corresponding to either temperature or humidity
  • Sensor break indication


  • humidity measurement



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