Features
- Humidity range: 0 to 100% RH
- Absolute humidity range: 0 to 1120 GPP (0 to 160 g/kg)
- Temperature range: -22 to 199°F (-30 to 100°C)
- Dewpoint range: -22 to 199°F (-30 to 100°C)
- Wet bulb range: 32 to 176 °F (0 to 80°C)
- Basic accuracy: ±2% RH, ±1.8°F/1°C
- Resolution: 0.1% RH, 0.1°F/°C
- 30 second response time
The Extech RH490 hygro-thermometer is a precision hygro-thermometer specifically designed for HVAC and water damage restoration contractors. The Extech RH490 hygro-thermometer features a fast 30 second response time and an accuracy of ±2%. The dual backlit display simultaneously shows humidity or water vapor in grains per pound (g/kg) along with either temperature, dew point, or wet bulb. The Extech RH490 hygro-thermometer features a slim, handheld design with rubberized sides for better grip and for one hand operation. The Extech RH490 hygro-thermometer has data hold and min/max functions as well as auto power off with disable and low battery indicator.
