The CellaTemp® PX 40 is a digital ratio pyrometer for the measurement of temperatures from 500 to 3000 °C. Due to the quotient measuring method, the device reacts less sensitively to disturbances caused by dust and steam in the field of view, dirty protective screens or changing measuring surfaces than a spectral pyrometer. A through-the-lens sighting, a laser pilot light or a camera module are available for easy and precise sighting of the measurement object.