The testo 831 is so fast that measurements on palettes or refrigerated shelves can be carried out in a few seconds. Small objects such as yoghurt pots can be measured at a distance. A two-point laser indicates the exact measurement spot.

• Adjustable emissivity of 0,2 to 1,0
• 30:1 optics (measurement spot Ø is 36 mm at a distance of one metre)
• Alarm limit values can be set and are optically and audibly indicated