The Model RH490 hygro-thermometer with direct digital display of grains per pound features 2 percent rh accuracy and an rh response time of less than 30 seconds. The dual backlit display enables the simultaneous viewing of humidity or grains per pound, along with air temperature, dew point, or wet bulb. The hygro-thermometer incorporates a slim design with rubberized sides for better grip and one-hand operation. The device features a data hold and auto power off with disable and low-battery indicator. It comes complete with carrying case and 9-V battery.

Extech Instruments, a FLIR Co., 285 Bear Hill Rd., Waltham, MA 02451; 781-890-7440, ext. 220; 781-890-7864 (fax);;

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