• Infrared measurement with 1-point laser sighting and 6:1 optics ratio
• Display of differential temperature, such as between a window and air
• Hold function and min./max. values
• Display illumination

The testo 810 infrared thermometer allows for the simultaneous measurement of the air temperature and surface temperature of the object being measured – without contact. This infrared temperature measuring instrument automatically displays the temperature difference. This makes it particularly suitable for use in the heating, ventilation, and air conditioning trades.

The testo 810 simultaneously measures ambient air and surface temperature via infrared sensors, at the touch of a button. For example, the testo 810 thermometer can take the non-contact surface temperature of a radiator or air vent, and compare it with the air temperature of the room at the same time. The testo 810 features a 1-point laser sighting and 6:1 optics ratio; it's also very compact, convenient, and easy to operate.