The New Karl Deutsch RMG 4015 Crack Depth Gauge measures crack depths on workpieces of iron, ferrous and austenitic steels and can also be used for cracks in copper, brass, aluminum and other non-ferrous metals. For the measurement of oblique cracks a special oblique cracks probe is available.
The RMG 4015 uses the electrical potential principle: A probe with four spring-loaded and gilded contact pins is positioned across the crack to be measured on the workpiece. A constant alternating current is passed via two of the pins into the workpiece; the two other pins measure the voltage drop across the crack from which the depth of the crack is derived. The alternating current of the instrument utilizes the skin effect, which forces the current to follow the surface of the conductor and therefore, follows the contour of the crack. The operation and measured value formation are monitored by the microprocessor of the gauge.
For Oblique cracks, the instrument is equipped with an additional measuring function for the determination of oblique cracks, which helps determine the inclination of the crack with respect to the material surface. The measurement is executed by means of a special four-pin probe, which allows you to connect an external current pole to be positioned to the left or right of the crack. Via the differences of the readings and the crack depth measured, the meter will determine the inclination and the projection perpendicularly to the surface.
RMG 4015 with probe for measuring oblique cracks
Small, battery operated mobile instrument
Displays the crack depth in mm or inches
Menu guided operation
Crack depth measurement for inclined cracks in ferromagnetic materials
Orientation of inclined cracks determinable with special probe setup
Robust probe design
Three standard probes are available for most workpieces
Special probes are available for surfaces of complex shape and difficult accessability crack locations
Sturdy, exchangeable and gold plated contant pins
Interface for printer and PC
Memory for measured crack depths
Fast evalution (1 measurement per second)
Single and continuous measurement operation
Wide range of accessories: control blocks, polishing fleece and self twisting or needle contact pins
Crack depth measurement of an inclined crack after angle determination
Measurement of a normal crack on a small area
Standard Probes (all dimensions in mm)
Probe RMSQ 0° Square arrangement of the pins for measurement of normal cracks at difficult to reach locations. Includes 1 spare contact pin (standard pin)
Probe RMSL 90° 90° right angled probe with linear arrangement of contact pins for measurement of normal cracks (e.g. inside of bore holes or inside of tubes) Includes 1 set of spare contact pins (standard pins)
Probe RMSL - S° Linear arrangement of contact pins for measurement of inclined and normal cracks. The design of the probe allows for measurement of difficult to reach locations. Includes external magnet as 2nd current pole, cable and 1 spare set of contact pins (standard pins)
Probe RMSL - S 90° 90° right angled probe with linear arrangement of contact pins for measurement of inclined and normal cracks (e.g. inside bore holes or inside of tubes). Includes external magnet as 2nd current polem cable and 1 set of spare contact pins (standard pins)
Probe RMSL 0° Linear arrangement of contact pins for measurement of normal cracks. The design of the probe allows for measurements of difficult to reach locations. Includes 1 set of spare contact pins (standard pins)
Special Probes (all dimensions in mm)
Special Probe RMSL 90° 90° right-angled probe with linear arrangement of contact pins for measurement of normal cracks. With a special arrangement of the pins it is possible to measure cracks with a width more than 2.54 mm (0.1 inch).
Special Probe RMSQ 90° 90° right angled probe with square arrangement of the pins to measure particularly small narrow cracks in very narrow gaps.
Special Probe RMSQ 0° Square arrangement of the pins to measure normal cracks at very difficult to reach locations (e.g. inside deep bore holes or grooves).
Depth measurement of surface cracks in electrically conducting materials
Principle of Measurement:
AC electrical potential drop method
2 x 1.5V AA Alkali-Manganese dry cells or alternatively 2 x 1.2V AA NiCd or NiMH rechargeable batteries. Optical alarm in case of empty batteries.
At least 11.5 hours with Alkali-Manganese cells.
A total number of approximately 3850 values can be stored in up to 300 batches. For each batch, a statistical evaluation can be printed out. This evaluation determines the minimum value, the maximum value, the average value and the standard deviation.
0 mm to 99 mm / 0 inches to 3.9 inches for ferrous materials and 0 mm to 12 mm / 0 inches to 0.5 inches for aluminum, copper and brass.
Depending on the material and measuring range. A typical figure for a two-point material correction on Ferromagnetic material is 3 to 15% and on austenitic materials is 3 to 25%.
RS232C to KARL DEUTSCH printer or PC: 4800 bauds, 8 data bits, 1 stop bit, no parity bit. USB adapter available.
Operating Temperature: From 0°C to 45°C, storage temperature: -20°C to 60 °C with removed batteries. From 0°C to 45°C with inserted batteries (depending on battery type and brand).