True Surface Thermocouple (TST)

Watlow's true surface thermocouple (TST) offers superior accuracy for measuring flat surface temperatures. This compact, highly accurate sensor isolates the thermocouple junction from ambient airflow. The TST typically achieves accuracy and repeatability between one to two percent (ΔT). The TST, with its removable molded cover, fits into corners and other tight locations. TSTs are easy to install with a variety of commonly used screw types.

Features & Benefits

Isothermal measuring junction offers excellent thermal conductivity for the measuring junction

Molded insulator isolates the isothermal measuring block from ambient airflow

Compact, universal package easily fits into corners and other tight locations


Optical Res Accuracy Temperature Outside Diameter
up to 400 up to 200 In Cm
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Quality Certificates

ISO 90012008 Certificate - Richmond

ISOIEC 17025 2005 Certificate - Sensors - 1-31-19 Richmond