Temperature Transmitters

Temperature Transmitters

A temperature transmitter converts the input signal from temperature sensors - most commonly RTDs and thermocouples - into a stable, standardized output suitable for control systems. Beyond basic conversion, modern digital transmitters add intelligence and flexibility, delivering high accuracy and becoming a critical component of the measurement chain that can improve process safety and efficiency.

Transmitter form factors are commonly offered as DIN-rail devices for panel installation, head-mounted modules that fit inside thermometer connection heads, and field transmitters designed for direct connection in the process area. Portfolios also include variants for hazardous areas and options for secure Bluetooth-enabled remote parametrization to simplify field setup and maintenance activities.

Key technical benefits include sensor linearization, stable signal conditioning for long cable runs, and enhanced resistance to electromagnetic interference by converting the sensor signal close to the measurement point. Digital designs can provide advanced diagnostics such as sensor break detection, out-of-range alarming, drift monitoring, and configurable damping, enabling earlier identification of measurement issues and more consistent control performance.

Transmitters are selected to match both the sensor type and the communication architecture. Common implementations include 4–20 mA loops for straightforward integration, and smart/digital protocols for richer diagnostics, device configuration, and asset management within DCS and maintenance platforms. Configuration flexibility also supports standardizing output ranges across assets even when sensor types or insertion geometries differ.

Typical applications span virtually all industries: retrofitting standardized outputs to existing RTD/TC installations, improving measurement stability in electrically noisy environments, adding diagnostics to critical temperature points, and supporting consistent calibration and configuration across fleets of instruments. They are also used to rationalize spares by decoupling sensor selection from output requirements at the control system interface.

Miller Mechanical Specialties, an exclusive authorized representative of sales and service for Endress+Hauser.