Temperature Switches

Temperature Switches

Temperature switches are instruments that provide discrete switching actions when a process temperature crosses a configured limit. They combine a temperature sensor with electronics that evaluate the measured value and drive one or more switch outputs, often alongside a standardized analog signal for trending or control. Many designs include a local display and push‑button or digital configuration, enabling straightforward setup and verification at the measurement point.

The main benefit is direct, reliable protection logic at the source. By generating a clean switching signal, temperature switches simplify alarm and shutdown functions for heaters, pumps, compressors, and other temperature‑sensitive equipment. Integrating switching and measurement functions in a compact device reduces panel components, wiring complexity, and commissioning effort, while supporting cost‑effective use of space in both industrial and hygienic installations.

Configuration options typically include one or two independent switch outputs, or a hybrid arrangement with one switch output plus a standardized analog output. This allows a single device to provide both a protective interlock and a continuous temperature value. A broad selection of process connections - including hygienic styles such as clamp and metallic sealing systems, as well as weld‑in adapters and compression fittings - supports consistent mechanical integration across diverse piping and vessel interfaces.

Temperature switches are applied wherever safe monitoring of process temperature is required: overtemperature protection on heat exchangers, jacketed vessels, and trace-heated lines; temperature limit monitoring in utilities and steam systems; and equipment protection for rotating machinery and bearings. In hygienic processes, they are common on skids and inline systems where compact form factor, clean connections, and rapid response improve control and reduce risk during thermal steps.

Key specification considerations include switching function (high/low limit), setpoint range and hysteresis, response time, accuracy, and environmental/hazardous‑area requirements. Output type and wiring philosophy should match the safety and control architecture, and any local display or diagnostics should be aligned with commissioning and maintenance practices.

Engineered Equipment Company, a leading supplier of specialized industrial equipment.