Temperature Switches

Temperature Switches

Temperature switches are instruments designed for monitoring and switching functions - providing discrete outputs for alarms, permissives, or protective interlocks tied to process temperature. They complement continuous transmitters by adding deterministic switching behavior at the instrument level, supporting fast, localized responses when a threshold is exceeded or when temperature must be maintained within a defined band. In the Endress+Hauser portfolio framing, they align with modern expectations for compactness, reliability, and straightforward commissioning.

The operational value is direct integration of measurement and switching. A temperature switch can be configured with one or two switch outputs, or with a combination of one switch output plus a standardized analog output to retain trending and control-system visibility. This supports layered protection and simplifies wiring where separate instruments for switching and indication would otherwise be required. Cost efficiency and optimal space utilization are recurring drivers in the category.

Process interface flexibility is a key differentiator. The portfolio description emphasizes switches with transmitter and display options and a broad set of process connections spanning hygienic and industrial needs, including clamp systems, metallic sealing systems, weld-in adapters, APV-inline, Varivent, Ingold-style connections, and compression fittings. Fast-responding sensors are positioned to support effective temperature monitoring and timely switching behavior for critical limits.

Typical applications include overtemperature protection on heat exchangers and heaters, temperature limit monitoring for rotating equipment auxiliaries, thermal protection for pumps and seals, and hygienic process temperature verification where a discrete alarm or shutdown threshold is required. They are also used where local indication and a simple relay output reduce dependence on control-system logic for basic protective functions.

Selection generally follows the needed switching philosophy (single vs. dual thresholds), required output mix (switch-only vs. switch + analog), and the mechanical connection standardization strategy. Matching response characteristics and process connection type to the service conditions ensures the switch functions as a reliable protective element rather than a nuisance-trip source.

Forberg Smith, an exclusive authorized representative of sales and service for Endress+Hauser.