Measure humidity and temperature simultaneously with the RH390 Precision Psychrometer from Extech. A dual-illuminated readout can be alternated to display wet bulb and humidity, or dew point and humidity, or temperature and humidity. This handheld device registers temperatures from -22 degrees to 199 degrees F (-30 degrees to 100 degrees C) and measures the full spectrum of relative humidity with ±2% accuracy between 20 and 90% RH. Complete with carrying case and 9V battery.
| Humidity | 0 to 100%RH |
| Temperature (Internal) | -22 to 199°F (-30 to 100°C) |
| Basic Accuracy | ±2%RH, ±1.8°F/1°C |
| Max. Resolution | 0.1%RH, 0.1°F/°C |
| Dewpoint | -22 to 199°F (-30 to 100°C) |
| Wet Bulb | 32 to 176 °F (0 to 80°C) |
| Dimensions | 7.8x1.7x1.3" (200x45x33mm) |
| Weight | 7oz (200g) |
