An ohmmeter is a type of meter used in the measurement of electrical resistance and continuity of an electrical circuit and components and are available in a range of sizes, voltages and types, each with varying levels of accuracy. Ohmmeters (or ohm meters) are available in three main variations including micro-ohmmeter (for measuring low resistance), standard ohmmeters for general purpose and meg-ohmmeter (for measuring high resistance), all of which measure electrical resistance in ohms.


Ohmmeters are used in a wide range of applications where the measurement of electrical resistance is required. Ohmmeters are commonly used in the following areas:

  • Laboratory and Research Environments
  • Production
  • Household Troubleshooting

How does an ohmmeter work?

Ohmmeters generally work by passing a small current through a sample, allowing the instrument to measure the voltage drop and how much an object resists allowing the current to flow through, highlighting the resistance in ohms.

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Description Price Maximum Resistance Measurement Resistance Measurement Resolution Measurement Type Battery Life Battery Type Power Source Handheld Dimensions Weight Height Length Maximum Accuracy Maximum Operating Temperature Minimum Accuracy
RS庫存編號 192-3099
+10 Ω, 1000 MΩ, 1000 Ω - - - AA Battery Yes 167 x 106 x 55mm 500g 55mm 167mm +3 %, +5 % - ±3 %
RS庫存編號 174-7893
2500 Ω 100nΩ 4 Wire - Rechargeable NiMH Battery Yes 270 x 250 x 180mm 4kg 180mm 270mm 0.05 + 300 mΩ % +50°C 0.05 + 1 μΩ %
RS庫存編號 523-392
399.9 Ω 1µΩ 4 Wire 1.2 h Rechargeable NiMH Battery - 273 x 247 x 280mm 5kg 280mm 273mm +0.25% + 2 digits - ±0.25% + 2 digits