The Extech RH390 Precision Psychrometer is a precision hygrometer produced by Extech Corporation. It has a dual backlit display, can simultaneously display temperature, humidity, dew point, and wet bulb, and has a precision of ±2%RH with a response time of less than 30 seconds.
The Extech RH390 is a precision psychrometer designed with a slim profile and rubberized sides for a secure one-hand grip. It features a dual backlit display capable of showing humidity/temperature, humidity/dew point, and humidity/wet bulb readings simultaneously. The device includes utility functions such as data hold, min/max recording, and auto power-off with low battery indicators, and comes supplied with a carrying case and 9V battery.
| Humidity Range | 0 to 100%RH |
|---|---|
| Temperature Range (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 |
| Dimensions | 7.8x1.7x1.3" (200x45x33mm) |
| Weight | 7oz (200g) |
The RH390 is a precision psychrometer that simultaneously displays humidity, temperature, dew point, or wet bulb readings.
The unit measures 7.8x1.7x1.3 inches (200x45x33mm) and weighs 7oz (200g).
The device provides a basic accuracy of ±2%RH.