The Inspector's Dur-O-Test is a pocket hardness tester. It meets DIN EN ISO 22557. It can perform hardness tests on both flat and curved surfaces.
The instrument consists of a sleeve with a pressure spring that can be bent to various tensions by using a slide. The spring acts on a tungsten carbide needle (1.0 mm / 0.04 in.) with its tip extending out of the sleeve. A locking screw fixes the slide, thus maintaining constant spring tension. Protect spring from fatigue, therefore, always set tension value at zero when not in use. Three pressure springs of varying strengths ranging from 0-20 N (0-2000g) are available to cover a large hardness range. Protect spring from fatigue, therefore, always set tension value at zero when not in use. |