An ohmmeter is a meter used in the measurement of electrical resistance and continuity of an electrical circuit and components and is 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. There are various types of meters available with different sensitivity levels which include micro, mega and milliohm meters.

Typical Applications for Ohmmeters

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 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. It’s important when using an Ohmmeter to sustain accurate measurements, this is done through calibration to UKAS standard or RS Components offers an in-house calibration service to RSCAL service.

Why choose RS Components for Ohmmeters?

RS Components have a large range of Ohmmeters from leading brands such as Megger, Chauvin Arnoux and from our very own brand RS PRO. Our wide range of products have been selected to meet high industry standards, so you are ensured reliable and robust solutions. RS Components has on hand technical advisors to offer advice on specific requests and offering our in-house calibration service.

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Description Price Maximum Resistance Measurement Resistance Measurement Resolution Measurement Type Battery Life Calibrated Battery Type Power Source Handheld Weight Height Length Maximum Accuracy Maximum Operating Temperature Minimum Accuracy
RS Stock No. 523-392
Mfr. Part No.P01143200
399 Ω 1µΩ 4 Wire - - Rechargeable NiMH Battery - 5kg 280mm 273mm +0.25% + 2 digits - ±0.25% + 2 digits
RS Stock No. 911-9658
Mfr. Part No.P01143200
399 Ω 1µΩ 4 Wire - RSCAL Rechargeable NiMH Battery - 5kg 280mm 273mm +0.25% + 2 digits - ±0.25% + 2 digits
RS Stock No. 174-7893
Mfr. Part No.P01143221
2500 Ω 100nΩ 4 Wire 4500 Tests - Rechargeable NiMH Battery Yes 4kg 180mm 270mm 0.05 + 300 mΩ % +50°C 0.05 + 1 μΩ %