The HD500 from Extech Instruments, Waltham, MA, combines the functions of a precision humidity meter, IR thermometer, and built-in Type K thermometer. Designed to meet the needs of the HVACR industry, the meter's IR thermometer has a temperature range to 500°C with a 30:1 distance to target ratio and its built-in Type K thermometer provides contact temperature measurements to 1372°C. Accuracy is 2% (RH). Other features include fast response time, rugged housing, backlit triple LCD, and built-in self-calibration utility that lets you perform field calibrations using optional RH calibration bottles.
Heavy-Duty Psychrometer from Extech