Testo 810 pocket size infrared thermometer 0560 0610 testo 0560 0810 p the 810 infrared thermometer from testo measures the temperature on two channels on one hand being an infrared thermometer it can take non contact surface temperature measurements of the object being measured on the other it can measure the air temperature using its additionally integrated ntc sensor p p the testo 810 infrared temperature measuring instrument is extremely well suited to use in heating ventilation