The WeatherMaster' Thermo-Anemometer Model 45158 is a packet-size meter that displays air velocity temperature or air velocity plus relative humidity on a large, dual display LCD. Wind speed values are displayed in six different units (feet/minute, meters/second, kilometers/hour, miles/hour, knots and Beaufort) with +/- 3 accuracy. Averaging for two-, five- or 10-second intervals can be selected. The unit also measures wind chill, dew point and relative humidity.
Extech Instruments Corp., 285 Bear Hill Road, Waltham, MA 02451-1064; 781/890-7440; fax 781/890-7864; www.extech.com.