Testo 835-T2 Infrared Thermometer, -10°C Min, ±1 %, ±2.0 °C Accuracy, °C Measurements / 7770434

3 batteries Type AA and calibration protocol. 2. Testo 835 T-2 Infrared Thermometer. For non-contact temperature measurements, the Testo 835 T-2 is specifically designed for trade and industry. Featuring a new processor it has better resolution and makes precise IR measurements possible. The 4-point laser thermometer has spot marking and 50:1 distance-to-spot ratio making the testing of small objects possible. With a pistol style ergonomic design it also features adjustable limit values and alarm function. The T2 can measure precise temperatures of up to 1500°C from a safe distance with it's extended temperature measuring range. Features and Benefits:. • -10°C to 1500°C temperature range • Fast readings • Audible and visual alarms • Back-lit display • Adjustable emissivity 0.10 to 1.00. FAQ's. Are infrared thermometers dangerous?. Infrared thermometers are not harmful, they do not emit radiation, only measure it like a digital camera. How accurate are infrared thermometers?. The majority of IR thermometers have a measurement error specification, which shows their best accuracy. The surface being measured can also affect accuracy. Reflective objects result in lower measurements than the actual temperature, whilst non-reflective surfaces give higher measurement. The emissivity of a surface is how effective it is at emitting energy as thermal radiation, as such some IR thermometers have adjustable emissivity settings. Distance to spot ratio is also essential in providing accurate temperature measurements, if an infrared thermometer is too close to its target area, heat can build up in the device. This can give false readings or damage the temperature sensors, therefore it is essential to always follow a manufacturers guidelines.