FAQ – Infrared Thermometers
- Q: How far away from an object should I be when I use my eT650D to measure surface temperature?
- A: The two laser beams cross at a distance of 8 inches (203 mm). This is the recommended target distance for most measurements. Since the distance-to-spot ratio of the eT650D is 10:1, the spot diameter at this distance is 0.8 inches (20 mm). To measure a smaller spot area, move the thermometer closer to the target and use the distance-to-spot ratio of 10:1 to estimate the spot size. For instance, at a target distance of 5 inches, the spot size is 0.5 inch (13 mm). The further away […]