Biddle 247000 DLRO Digital Low Resistance Ohms Meter

Biddle 247000 DLRO Digital Low Resistance Ohms Meter
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Discontinued - Replaced by the Megger DLRO10HD

The Biddle 247000 Digital Low Resistance Ohmmeter (DLRO) is a highly accurate instrument that provides a simple, practical and reliable means of making low-resistance tests in the field and is also ideal for production quality control.

The Biddle 247000 ductor operates on the four-wire measurement principle, thus eliminating lead and contact resistances. With basic accuracies of ±0.25% and resolution down to 0.1 µ ohms, it is nonetheless designed to be rugged and portable for use at the job site.



  • Switch and circuit breaker contacts
  • Transformers and generators
  • Motor windings
  • Busbar and other joints
  • Aircraft, rail and pipe bonds
  • Cable splices, welds and fuses
  • Metal alloys
  • Graphite electrodes and other composites
  • Wire and cable



  • Kelvin-type, four-wire measurement eliminates errors caused by lead and contact resistance
  • Digital readout with automatic zero circuit eliminates field test inaccuracies
  • Broad line of test leads is available to simplify and enhance data collection



Resistance Range 0 - 5.999 m ohms
0 -59.99 m ohms
0 - 599.9 m ohms
0 - 5.999 ohms
0 - 59.99 ohms
Resolution 1 µ ohms
10 µ ohms
0.1 m ohms
1 m ohms
10 m ohms
Current 10 A
1 A
100 mA
10 mA
1 mA
Accuracy (0.25% rdgd + 1 lsd)
Power Source Rechargeable batteries with separate charger
Dimensions 8" H x 9" W x 8" D
Weight 12.25 lb