ATP’s range of K-Type Thermometers are available with single, dual or multiple inputs. We also provide a wide selection of K-Type Probes and data logging features across the range. A K-Type thermometer can accept various types of Thermocouple. A thermocouple is a temperature measuring device consisting of two dissimilar metals. The metals are welded at the tip to form what is commonly known as the thermocouple junction. The most common thermocouple junction is the type K as it provides the widest operating temperature range.