Crack Depth Meter RMG 4015 Our new crack depth gauge RMG 4015 measures crack depths on workpieces of iron, ferrous and austenitic steels and can also be used for cracks in copper, brass, aluminium and other non-ferrous metals. New feature: Measurement of oblique cracks with special probes

The RMG 4015 operates due to the potential probe principle: A probe with four spring-loaded and gilded contact pins is positioned across the crack to be measured on the specimen. A constant alternating current is passed via two of the pins into the specimen; the two other pins measure the voltage drop across the crack, where the crack depth is derived from. The instrument takes advantage of the skin effect, which forces the current flow to the surface of the conducting material and thus follows the contour of the crack.

Operation and readings are monitored by the microprocessor of the gauge. Incorrect handling or faulty measurements caused by improper probe placement or imperfect contacts therefore are out of question.

The measurement uncertainty of the instrument depends on the material and lies between 1 and 15 % on ferrous material resp. between 1 and 25 % on austenite, after 2 point correction by means of a reference crack.

Steel qualities of higher electrical conductivity and lower permeability, due to the lower skin effect, tend to a higher inaccuracy than steels of lower conductivity and higher permeability. But even on non-ferrous metals, such as aluminium, brass etc. crack depths can be measured, where up to now these measurements were not possible or only with insufficient accuracy.

The crack depth gauge RMG 4015 is equipped with a built-in data logger for up to 3850 measured values, which may be divided into max. 300 batches. A built-in real-time clock automatically reports the date of the measured values. Via the RS232 interface, test reports can be printed on a small-size and battery-operated printer or the instrument can be connected to a PC.

For further processing options the PC program STATUS Windows is available, which not only acquires the measured values, but also offers data administration or a graphics display. Furthermore, test reports or other documents can be created.

The instrument is either battery-powered or can be connected to a mains module. The instrument size is 83 x 151 x 35 mm³. Its light weight of 265 g incl. batteries only and the simple handling of the probes now make the crack depth measurement a low-cost, simple, safe and quick procedure.

Last but not least, the price of the RMG 4015 is very competitive. Just contact KARL DEUTSCH for more information.