The HD500-NISTL Psychrometer with Infrared Thermometer combines 3 in 1 with humidity meter, type K thermometer and infrared thermometer functions. The HD500-NISTL features a large triple LCD backlit display, built in USB port, minimum/maximum, data hold and auto power off functions. Built-in InfraRed Thermometer for non-contact temperature measurement to 932°F (500°C). Includes a 3 year warranty, Windows compatible software with USB cable, Type K bead wire probe, carrying case and 9-volt battery. Includes a limited NIST traceable certificate.