Extech Instruments has launched its heavy-duty series of instruments, a new line of products specially designed to meet the needs of the HVACR industry. The HD200, a differential thermometer data logger and infrared thermometer, allows users to take differential temperature readings with dual Type K thermocouple probes, as well as noncontact surface temperature measurements using an optional IR thermometer probe. The HD300 CFM/CMM thermo-anemometer with IR thermometer provides simultaneous display of air flow in CFM/CMM or air velocity plus ambient temperature. Housed in a protective carrying case, it can measure remote surface temperatures to 932°F (500°C) with 30:1 distance-to-spot ratio and laser pointer. The HD500 psychrometer with IR thermometer is a three-in-one combination meter with the functions of a humidity meter, Type K thermometer, and infrared thermometer. The HD700 differential pressure manometer can serve as a low range/high resolution gauge or can provide differential pressure from zero to 55.40 inches of water. Max/min recording and relative time stamp are featured, as well as data hold and auto power off functions.

Extech Instruments, 285 Bear Hill Road, Waltham, MA  02451; (781) 890-7440; fax (781) 890-7864; www.extech.com.