The infrared thermometer Comparator provides a stable black body temperature source and is an inexpensive way of checking infrared hand held thermometers when used in conjunction with a Reference thermometer. The Comparator consists of an aluminium cup Ø60 x 100mm with a solid matt black base. The base incorporates two Ø3.5mm holes, one for a Reference thermometer's probe and the other for an additional probe, if required. Please note the Comparator is not supplied with any thermometers. For details of the Reference thermometer, please click here. Click here to find out more about how to validate readings from your infrared thermometer.