With a 30:1 optics, the measurement spot diameter at a distance of 1 meter is only 36 mm. This means that even smaller objects, such as yogurt cups, can be easily measured from a distance. A 2-point laser marking accurately displays the diameter of the measurement circle, which helps avoid measurement errors. With two measurements per second, the Testo 831 is fast enough to perform scans on pallets or refrigerated shelves in a short amount of time. The user can set an alarm threshold that is continuously monitored during measurement and will trigger an acoustic and visual alert if exceeded or not met. This allows for quick and easy identification of defective products. The large, clear display is illuminated, ensuring that values can be read perfectly even in poor ambient light, such as in storage rooms. Typical applications include rapid temperature tests during goods receiving inspections, in freezers, in refrigerated shelves, or in production at butcheries, bakeries, food manufacturers, or supermarkets.