The device is designed to read relative humidity (RH) and ambient temperature dew point and wet bulb, and functions as a type K or J thermometer

It records data onto standard SD memory cards (like a digital camera). When full, simply exchange SD cards for unlimited data storage. The removable SD card is easy to transport and insert into a computer’s memory card slot or SD card adapter. It then uploads preformatted data to Excel, without the need for additional software and cables. Additional SD cards are readily available in a variety of memory sizes. The card logger can also stream data directly to a computer using the optional software and cables. Each data set includes temperature, RH, time, and date. It features min./max., auto power off, low battery indicator, and hold function. This well made unit is extremely accurate with fast response times, and includes a fold-out tripod and large, easy-to-read backlit LCD.