Extech RH490-NIST Precision Hygro-Thermometer is a professional tool for HVAC and water damage restoration contractors. It features a fast response time, simultaneous display of humidity or GPP (g/kg) and temperature, dew point or wet bulb temperature, and data hold and min/max functions.
The Extech RH490 is a precision hygro-thermometer specifically designed for HVAC and water damage restoration contractors. It features a slim design with rubberized sides for one-hand operation and includes dual backlit display capabilities.
Key measurement functions include simultaneous display of humidity or Grains per Pound (GPP)/Grams per Kilogram (g/kg) plus Temperature, Humidity/Dew Point/Wet Bulb/Absolute Humidity. The device offers a response time of less than 30 seconds and includes data hold and Min/Max functions.
| Humidity Range | 0 to 100%RH |
|---|---|
| Temperature Range (Internal) | -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) |
| Absolute Humidity Range | 0 to 1120GPP (0 to 160g/kg) |
| Basic Accuracy (Humidity) | ±2%RH |
| Max. Resolution (Humidity) | 0.1%RH |
| Dimensions | 7.8x1.7x1.3" (200x45x33mm) |
| Weight | 7oz (200g) |
The RH490 is specifically designed for HVAC and water damage restoration contractors.
The humidity measurement range is 0 to 100%RH.
The humidity response time is less than 30 seconds.