The DET14C represents a new generation of grounding measurement clamps for measuring resistance in a grounding system. These current clamps induce a voltage in the loop and measure the current flowing in the grounding system. From this, the resistance of the earth loop can be determined. This allows for the measurement of resistance in grounding or lightning protection systems without the need to disconnect individual ground rods. The innovative elliptical design of the clamp jaws and the short clamp body enable it to encompass both round and flat grounding connections. The use of flat clamp jaws prevents dirt accumulation on the measuring clamp and ensures measurement accuracy and reliability in practice. Advanced features, ease of use, and measurement category CAT IV 600 V are additional outstanding characteristics. The DET14C grounding measurement clamps have a memory for 256 measurement values.