Models 869 digital RTD thermometer measures temperatures from -100 to 630 °C. Compatible with either 3 or 4 wire RTDs, temperature measurement is performed with a best accuracy of .3°. These thermometers are specially constructed with a heavy duty ABS case specifically designed for industrial use. Model 869 reads in °C. An optional tilt stand/belt clip, PN8660, is available for field or bench top use.