TMS21

Thermocouples feature a simple structure and rugged construction. Thermocouple sensors measure temperature based on the Seebeck effect. Two dissimilar conductors are connected to form a closed loop. A tiny voltage difference develops in the loop whenever the temperatures at the two junctions differ. This voltage difference is known as thermal voltage or thermoelectromotive force. Its magnitude depends on the materials of the two conductors, as well as the temperature difference between the "measuring junction" (the joint of the two conductors) and the "cold junction" (the open‑circuit ends of the conductors). For this reason, thermocouples are generally only used for temperature‑difference measurement. The absolute temperature at the measuring junction can be obtained if the cold‑junction temperature is known, or after separate temperature measurement and compensation. Standards IEC 60584 and ASTM E230/ANSI MC96.1 list common thermocouple conductor material combinations and their corresponding thermal‑voltage‑to‑temperature characteristics.

High‑end Application

It is specially designed for applications requiring compact‑size and lightweight probes. The TMS21 adopts a modular design to flexibly meet customer‑specific requirements. Only one process connection is needed to monitor temperature at multiple measuring points along the entire pipeline. It consists of several small‑diameter sensors, all protected by one thermal thermowell. Two product options are available: with or without a top flexible protective hose (for centering installation).