Review on Smartsails 2M K Type Temperature Sensing Line - 5PCS Thermocouple Temperature Probe, Sensor TES1310 TM902C: Accurate Temperature Measuring Solution by Eric Pruett

The terminals on these thermocouples are not true K-type terminals which will introduce errors in your measurements. The metal on the pins should be Chromel® and Alumel®, not stainless steel and stainless steel For best results, use a connector plug with a true Type-K connector. Chromel® and Alumel® pins are slightly magnetic due to their nickel content.