RH200 Hygro-Thermometer

The Extech RH200W multi-channel hygro-thermometer, with easy-to-read 1.3" (33mm) digits, displays indoor temperature and humidity levels. You can connect up to 8 wireless transmitters to remotely measure temperature/humidity levels up to 98ft (30m) away. The LCD is designed with an auto-night light, and it displays icons that indicate indoor comfort levels and trending arrows that show the increase, decrease or consistent readings. It also records Min/Max for the duration of each measurement session. The Extech RH200W is ideal for multi-room environmental monitoring.


  • Base Station LCD with Auto-Night Light displays local and up to eight remote Temperature/Humidity readings either auto-cycle or manual mode from the wireless transmitters
  • Easy-to-read 1.3" (33mm) oversized digits
  • Min/Max recording with reset
  • Indoor Comfort icons displayed on Base Station indicating too cold, comfortable, or too hot/humid conditions
  • Trend arrows indicate rising, steady or falling of the Temperature/Humidity readings
  • Snow icon appears when remote temperature is 37.4°F (3°C) or below
  • Transmitter LED flashes to indicate normal operation
  • Transmitters can be mounted up to 98ft (30m) from the base station
  • Operates at 433MHz; FCC approved
  • Includes a base station with 4 AA batteries and one transmitter with 2 AA batteries. Additional remote Transmitters (RH200W-T) sold separately (up to 8 transmitters can be wirelessly connected to the base)