PyroSigma: New Infrared Temperature Sensor with Built-in Display

The remarkable new PyroSigma infrared temperature sensor with built-in display is now available to order. 

Calex PyroSigma - miniature infrared temperature sensor with display - rear view showing display and controlsCalex PyroSigma - miniature infrared temperature sensor with display - front showing lens and mounting holes



Measure temperature where space is limited. The PyroSigma is just 29 mm long and 31 mm in diameter.


See the temperature of a surface from 0°C to 1000°C (32°F to 1832°F) without touching it. The sensor works by detecting the thermal IR radiation that objects naturally emit due to their own temperature.

Bright Display

View the temperature directly on the sensor itself. The bright OLED display is easy to read, even in the dark.


No need for additional configuration dongles or interface modules. The sensor is easy to configure using the built-in push-buttons.

Industry Standard Output

Connect the PyroSigma to your panel display, PLC or controller via a configurable, linear voltage output (selectable 0-5, 1-5 or 0-10 V DC).


The PyroSigma provides accuracy of +/- 1.5°C or 1.5%, and repeatability of +/- 0.5°C or 0.5%, for its entire temperature range.

Low Cost

The PyroSigma has the features normally found in expensive pyrometers, but in a very low-cost package. Contact Calex to find out how to order the PyroSigma in your region.

Full specifications: PyroSigma (

By Anthony Smith
  • PyroSigma