Buy a digital K-type thermometer with stainless steel probe HT-02
How Thermocouples Works and Basic Working Principle
Waterproof K Type Thermocouple - Jaybva Grounded Temperature Sensor Probe for PID Temperature Controller Two Wire Stainless Steel NPT3/4" BSPT 1/2" inch Pipe Thread 0~500℃ with 2m Shield Wire: Amazon.com: Industrial &