The Arctic Hayes 3-in-1 Thermometer is a pipe, infrared and stem thermometer, all in 1 instrument. Select measurement in deg;C or deg;F with a response time less than 1 second. The clamp opens to a max. of 1in (25mm) approx. Other features include: max./min. record, data hold and automatic power off function. Specification: IR Temp. Range Temperature Range: -35deg;C to #43;260deg;C/-31deg;F to 500deg;F.IR Temperature Resolution: 0.1deg;C/deg;F.Optical Resolution 1:1 Distance to Spot Size.Thermistor Temperature Range: -40deg;C to #43;260deg;C/-40deg;F to 500deg;F.Resolution: 0.1deg;C/deg;FBasic Accuracy: 2% of Readings.