The arctic hayes 3 in 1 thermometer is a pipe infrared and stem thermometer all in 1 instrument select measurement in c or f with a response time less than 1 second the clamp opens to a max of 1in 25mm approx other features include maxmin record data hold automatic power off function specification ir temp range temperature range 35c to 43 260c 31f to 500fir temperature resolution 01cfoptical resolution 11 distance to spot size thermistor temperature range 40c to 43 260c 40f to