Extech RH300 Digital Psychrometer is a device that can measure relative humidity, air temperature, and dew point temperature. It features data hold, auto power off, and MIN/MAX record functions.
The Extech RH300 and RH305 are digital psychrometers designed to measure relative humidity, air temperature (T1), and optional external probe temperature (T2). The device calculates derived values such as dew point, wet bulb temperature, and temperature differences. It features a three-zone LCD display, data hold, min/max recording, and an adjustable auto power-off function. This manual is written in Chinese.