Called the "Seeker Series" for their ability to detect and monitor a broad range of potentially hazardous environmental and physical conditions, General Tools & Equipment offers a line of specialty instruments for testing and measuring temperature, moisture, humidity, flammable gases, escaping microwaves, and ultraviolet sun exposure. The non-contact, handheld Heat Seeker infrared thermometers, No. IRT203 and IRT206, detect energy loss around doors and windows, insulation, ductwork, as well as heat hazards such as overloaded circuit breakers or wiring.