Karl Deutsch RMG-4015 — Crack Depth Probe RMSQ 0°

SKU: 4418.001

Overview

The Karl Deutsch Crack Depth Probe RMSQ 0° is a high-precision, straight-orientation probe designed exclusively for use with the Karl Deutsch RMG-4015 Crack Depth Meter. Purpose-built for non-destructive testing (NDT) applications, this probe enables accurate and repeatable measurement of surface-breaking crack depths in a wide range of electrically conductive materials — including steel, iron, austenite, aluminium, copper, and brass.

The RMSQ 0° is the go-to probe for inspectors who need reliable crack depth data on standard perpendicular cracks, particularly in challenging locations where other probe types cannot reach or maintain consistent contact.

Design & Construction

The defining feature of the RMSQ series is its square-shaped arrangement of four contact pins. Unlike linear pin configurations, this square layout provides superior stability and contact consistency on small, curved, or irregular surfaces — making it ideally suited for components that would otherwise be difficult to inspect.

The probe operates on the proven AC Potential Drop (ACPD) four-pole technique: two outer contact pins introduce a controlled alternating current into the test material, while the two inner pins measure the resulting voltage drop across the crack. The RMG-4015 meter processes this data to calculate and display an accurate crack depth reading.

All contact pins are spring-loaded, tip-hardened, and gilded, ensuring reliable electrical contact with minimal attachment pressure — reducing operator fatigue and the risk of surface damage during inspection.

Key Features

• Square pin arrangement — optimized for measurements on small, curved, or hard-to-reach surfaces
• 0° straight orientation — ideal for standard perpendicular crack measurements on flat or accessible surfaces
• Spring-loaded, gilded contact pins — consistent electrical contact with low attachment pressure required
• Exchangeable contact pins — extends probe service life and reduces long-term costs
• Includes 1 spare contact pin (standard pin) — ready for immediate field use
• Compatible exclusively with the Karl Deutsch RMG-4015 Crack Depth Meter

Ideal Applications

• Crack depth measurement on small or curved component surfaces
• Hard-to-access locations where linear probes cannot achieve stable contact
• Quality control and rework evaluation of high-value components
• Supplement to Magnetic Particle Testing (MT) and Penetrant Testing (PT)
• Aerospace, automotive, oil & gas, power generation, and heavy manufacturing inspections

Compatible Materials

The RMSQ 0° probe can be used across a broad range of electrically conductive materials, including:

• Steel and iron
• Austenitic (stainless) steels
• Aluminium
• Copper
• Brass
• Most non-ferrous metals

Part of the RMG-4015 Probe Family

The RMSQ 0° is one of several probes available for the RMG-4015 system, each designed for specific inspection scenarios:

What's Included

• Crack Depth Probe RMSQ 0°
• 1 spare contact pin (standard pin)