The HygroLog HL-20/21 humidity and temperature data logger has a large memory of up to 20,000 data points. In addition to recording humidity and temperature, it has the option of recording dew/frost points. All recorded data is date and time stamped. The accuracy of the data logger is unparalleled at 0.8 percent rh and 0.2°C, claims the company. The data logger utilizes the latest AirChip 3000 technology and Hygromer® sensors. It can be used in many applications including those in critical areas such as pharmaceutical clean rooms, warehouses, production rooms, transportation containers, museums, and test facilities or to ensure ideal temperature and humidity values in buildings and office environments. Programming, downloading, and graphing of recorded data is straightforward and uncomplicated with the HW4 software.

Rotronic Instrument Corp., 135 Engineers Rd., Ste. 150, Hauppauge, NY 11788; 631-427-3898; www.rotronic-usa.com

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