The Extech RH390 Digital Psychrometer is a device that measures humidity, air temperature, dew point temperature, and wet bulb temperature. It features advanced functions such as data hold, auto power off, and max/min reading.
The Extech RH390 Digital Psychrometer is a handheld instrument designed to measure humidity, air temperature, dew point temperature, and wet bulb temperature. Key features include data hold, maximum/minimum recording, backlight, and automatic power-off functionality. The device utilizes a 9 Volt battery and features a dual LCD display for reading various parameters.
| Wet Bulb Range | 0 to 80°C |
|---|---|
| Dew Point Range | -30 to 100°C |
| Response Time | <30 seconds |
| Operating Conditions | 32 to 122°F (0 to 50°C) |
| Power Supply | 9 Volt battery |
| Battery Life | Approx. 24 hours |
| Dimensions | 7.8 x 1.7 x 1.3 inches |
Press and hold the Hold button while powering on the meter.
Press the MAX/MIN button to toggle between MAX and MIN modes.
Press and hold the Light button until the backlight comes on.
The response time is less than 30 seconds.