One of 5 interchangeable probes for use with the Key Temperature Tester, the HI98517-15 is a K-type thermocouple probe intended for temperature measurements that require penetration of liquids. The HI98517-15 is designed with a 170 mm (6.7”) long AISI 316 stainless steel probe and the rounds tip provides a fast response and improved accuracy over the entire range.