The SIR2 Infrared Pocket Thermometer with Laser Sight is among our most popular IR thermometers. It conveniently fits in a shirt pocket and boasts a 6:1 field of view. The laser guide helps you aim at the target with a reaction time much faster than thermistor based thermometers. Use it immediately after pulling from it from your pocket. A favorite among HVAC/R professionals with a range of -27°F to 482°F.