Model TRH-CA thermo-hygrometer measures relative humidity and temperature and calculates and displays either dewpoint or wet bulb temperature. At 25 degrees C, the temperature measurement accuracy is ±0.3 degrees; humidity measurement accuracy is ±2 percent between 35 percent to 90 percent rh. The unit runs on a 9-V battery and can be held in the hand or attached to a belt (in a vinyl carrying case) or a tripod for hands-free operation. Its three-line LCD can be adjusted 120 degrees to provide different viewing angles, the company states.

Shinyei Corp. of America, 11 E. 44th St., Ste. 700, New York, NY 10017; 212-682-4610, ext. 14; 212-286-8426 (fax);

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