Temperature Switches

Temperature Switches

Temperature switches are instruments designed for safe monitoring of process temperatures with discrete switching outputs, and in many cases a simultaneous analog output. They combine sensing and evaluation in one device so that a defined temperature threshold can directly drive an alarm, interlock, or control action. The category is positioned as modern, space-efficient instrumentation emphasizing reliable operation and easy commissioning.

Functional flexibility is provided through output configuration. Devices can be selected with one or two switch outputs, or with one switch output plus a standardized analog output, enabling both protective switching and continuous indication to coexist in the same measurement point. A variety of process connections supports broad mechanical compatibility across different piping standards and hygienic/industrial connection practices.

Integrated features often include transmitter and display options, allowing local visualization of temperature and setpoint status while still providing control-system signals. Fast sensor response is highlighted in the portfolio description (e.g., very short t90 response time) to support applications where temperature changes rapidly and where switch delay translates directly into process risk or quality loss.

Benefits typically show up in simplified architectures for protective functions. By consolidating sensing, threshold logic, and outputs, temperature switches reduce the need for separate signal conditioning and logic blocks for straightforward temperature protection duties. They also provide a clean interface for standardized interlocks, helping limit variability and improve maintainability when many similar monitoring points are deployed.

Typical applications include temperature alarms on vessels and piping, pump and bearing protection, freeze/overheat protection on utilities, and local interlocks where a dedicated switch signal is preferred over a control-system-derived alarm. They also fit well on packaged equipment where a compact, integrated monitor is needed to enforce temperature limits independently of higher-level automation availability.

Field Instruments & Controls, Inc. an exclusive authorized representative of sales and service for Endress+Hauser.