The TRH22 measures relative humidity (RH) and temperature.
It measures humidity from 0% to 100% and displays temperature from -20 °C to 60 °C  (-4 °F to 140 °F).
in either Fahrenheit or Celsius. Dual display shows both values simultaneously

• Dual display of both RH and Temperature
• Relative function monitors changes in humidity and temperature
• Extended probe stem to easily access air ducts
• Min/Max readings
• Data Hold
• Capacitive sensor with protective metal cover
• Auto Power off
• Soft Carrying Case
• One-year warranty