The PyroEpsilon series is a range of high quality, low cost, compact sensors which measure the temperature of inaccessible or moving objects and materials from -20°C to 500°C.

Calex PyroEpsilon sensors provide a linear 4 to 20 mA output representing target temperature plus a 4 to 20 mA input to control the sensor's emissivity setting. This method of emissivity adjustment is far more accurate and repeatable than a built-in potentiometer, much easier to access and less prone to drift through vibration.

The sensor’s emissivity setting can be adjusted from 0.2 to 1.0 to cope with different target materials and presents the opportunity for automatic control using a programmable logic controller (PLC). Alternatively the emissivity setting can be adjusted manually using the optional PyroTune module. If the 4-20 mA input is left open or short-circuit the emissivity setting defaults to 0.95.

The PyroTune module can also be used as a low cost setpoint transmitter for regulating control valves or adjusting the setpoint on a remote controller.

These compact sensors are small enough to fit almost anywhere and their rugged stainless steel housings make them ideal for applications where cleanliness and hygiene are paramount.

PyroEpsilon sensors are RoHS compliant and conform to EN 61326-1:2006 for EMC. They are designed and built by Calex Electronics in the UK, a company with more than 30 years experience of non-contact infra-red temperature measurement.