If you're calibrating IR guns at cold temperatures, this is for you. With solid-state cooling technology, this new IR calibrator reaches -30degrees Celsius (22degrees Fahrenheit) in standard ambient conditions. With a conveniently located dry gas fitting on the front bezel, ice buildup on the target can be avoided. At the upper end of its range, the 9133 provides steady temperatures to 160degrees Celsius (320degrees Fahrenheit). With heating and cooling times of about 15 minutes from ambient to either extreme, this gets you to the temperature quickly and performs when it gets there. Compare your IR devices to the temperature display-its factory calibrated to be within plus or minus0.4degrees Celsius (plus or minus0.7degrees Fahrenheit). No other IR calibrators give you this level of precision in such compact packages. Whatever your temperature application, trust a Hart product to solve it. Range: -30 to 150degrees Celsius @ 23degrees Celsius ambient (-22 to 302degrees Fahrenheit @ 73degrees Fahrenheit ambient)