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100 A highly portable micro-ohmmeter with DualGround safety

DLRO100E, DLRO100X and DLRO100H

  • DLRO100E, DLRO100X and DLRO100H
  • DLRO100E, DLRO100X and DLRO100H
  • DLRO100E, DLRO100X and DLRO100H
  • DLRO100E, DLRO100X and DLRO100H
  • Overview  
  • Application  
  • Downloads  
  • CAT IV 600 V and DualGround for improved operator safety

  • Light, 100 A, battery powered unit for portability

  • High noise immunity for stable readings

  • Smooth DC output for circuit breaker testing

  • IP54 for protection against dust and moisture whilst testing

  • Save, download and delete results (DLRO100X and DLRO100H variants)

  • Remote operation, Bluetooth® and asset and result tagging (DLRO100H variants)

DLRO100 enables low resistance measurement, across multiple applications, in areas without access to mains power. The integral Li-ion battery supplies a constant 100 A current for up to 200 automatic or manual tests enhancing productivity in remote locations.

With a focus on user safety, advanced design features ensure the safe operation of the instrument in the most adverse conditions, including a CAT IV 600 V safety rating in accordance with IEC61010. A DualGround feature is available on the DLRO100X and DLRO100H, which adds to the operators' safety by grounding both sides ofthe breaker under test.

The tough design, intuitive interface and IP54 (lid open) rating ensure reliability and ease-of-use in the most arduous of conditions.


The need for accurate low resistance measurement is well known and very diverse.
Typical applications include:

Utilities & Service Contractors – commissioning new installations and regular maintenance testing
   Switchgear and circuit breaker contact resistance
   Busbar and cable joints
   Wire and cable resistance
   Lightning conductor bonding

Original Equipment Manufacturer – detecting manufacturing defects
   Production test of circuit breakers – contacts and joints
   Production test of high voltage switchgear
   Production test of welded joints and connections

Transport – manufacturing and maintenance
   Railway rolling stock ground connections and manufactured joints
   Railway lines and conductor rails – commissioning and maintenance
   Aircraft frame bonds and static control circuits