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Ohmmeters

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 offers an in-house calibration service to RSCAL service.

Why choose RS for Ohmmeters?

RS 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 has on hand technical advisors to offer advice on specific requests and offering our in-house calibration service.

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In Stock RS PRO Handheld Insulation Tester, 50 mΩ Max RS stock no. 124-498 Subtotal (1 pack of 1 unit) R 5 608,96(exc. VAT) R 5 608,96/pack Quantity		Handheld	50mΩ	Insulation Tester	-	-	-	-	-	AAA	Battery, Mains	-	634g	68mm	210mm	5°C	-	-	40°C	-	-	EMC/LVD	97mm	-
In Stock RS PRO RM-804 Ohmmeter, 5 mΩ Max, 1 μΩ, 4 Wire RS stock no. 122-5158 Subtotal (1 unit) R 13 821,98(exc. VAT) R 13 821,98/unit Quantity		-	5mΩ	Ohmmeter	-	1μΩ	4 Wire	-	-	-	Mains	-	4kg	283mm	223mm	0°C	-	0.2 %	35°C	RM-804	-	MILSTD1344 method 30021	102mm	0.05 %
In Stock RS PRO Handheld Ohmmeter, 100 μΩ, 4 Wire RS stock no. 124-0940 Subtotal (1 unit) R 6 195,58(exc. VAT) R 6 195,58/unit Quantity		Handheld	-	Ohmmeter	-	100μΩ	4 Wire	-	-	-	Battery	-	700g	160mm	100mm	5°C	-	±0.3 % +1 Digit	40°C	-	-	No	52mm	-
In Stock RS PRO RS-6202H Handheld Ohmmeter, 4 Wire RS stock no. 275-0034 Subtotal (1 unit) R 7 186,24(exc. VAT) R 7 186,24/unit Quantity		Handheld	-	Ohmmeter	-	-	4 Wire	-	-	Lithium-ion	Mains, Battery	-	600g	67mm	212mm	0°C	UK	-	40°C	RS-6202H	-	RoHS	100mm	-
Temporarily out of stock RS PRO RM-804 GPIB Ohmmeter, 1 μΩ RS stock no. 122-5157 Subtotal (1 unit) R 18 884,35(exc. VAT) R 18 884,35/unit Quantity		-	-	Ohmmeter	-	1μΩ	-	-	-	-	100/240 V ac	-	3kg	102mm	283mm	-10°C	-	0.05 %	40°C	RM-804 GPIB	-	MILSTD1344 method 30021	223mm	0.02 %
In Stock RS PRO RM-805 Ohmmeter, 5 mΩ Max, 1 μΩ, 4 Wire RS stock no. 122-5156 Subtotal (1 unit) R 23 678,49(exc. VAT) R 23 678,49/unit Quantity		-	5mΩ	Ohmmeter	-	1μΩ	4 Wire	-	-	-	Mains	-	4kg	283mm	223mm	-50°C	-	0.2 %	399.9°C	RM-805	-	EN61010IEC 61010-1	102mm	0.05 %
Temporarily out of stock Megger Handheld Ohmmeter, 100 mΩ, Low Resistance RS stock no. 265-5896 Mfr. Part No. 1013-795 Subtotal (1 unit) R 66 532,35(exc. VAT) R 66 532,35/unit Quantity	Megger	Handheld	-	Ohmmeter	-	100mΩ	Low Resistance	-	-	HR	Battery	-	905g	105mm	228mm	0°C	UK, EU, US, AUS	-	50°C	-	-	No	75mm	-
In Stock Megger DLRO10X Handheld Ohmmeter, 100 nΩ, Low Resistance RS stock no. 910-6807 Mfr. Part No. 1006-601 Subtotal (1 unit) R 114 061,65(exc. VAT) R 114 061,65/unit Quantity	Megger	Handheld	-	Ohmmeter	-	100nΩ	Low Resistance	-	-	Rechargeable Nickel-Metal Hydride	Battery, Mains	-	2.6kg	237mm	220mm	5°C	Type F, 3-Pin (Global)	0.2 %	45°C	DLRO10X	-	No	100mm	±0.2 %
In Stock Megger Ohmmeter, 0.01 mΩ, Voltage, Current RS stock no. 265-5882 Mfr. Part No. 1008-047 Subtotal (1 unit) R 92 857,60(exc. VAT) R 92 857,60/unit Quantity	Megger	-	-	Ohmmeter	-	0.01mΩ	Voltage, Current	7h	-	6V-7Ah Sealed Lead Acid	Mains	-	6.7kg	181mm	315mm	-10°C	-	±10 %	50°C	-	-	No	285mm	0.2 %
In Stock Chauvin Arnoux Handheld Ohmmeter, 100 nΩ, 4 Wire RS stock no. 174-7893 Mfr. Part No. P01143221 Subtotal (1 unit) R 96 767,93(exc. VAT) R 96 767,93/unit Quantity	Chauvin Arnoux	Handheld	-	Ohmmeter	-	100nΩ	4 Wire	-	-	Rechargeable Nickel-Metal Hydride	Battery	-	4kg	180mm	270mm	0°C	-	0.05 + 300 mΩ %	50°C	-	-	CE	250mm	±0.05 %
In Stock Chauvin Arnoux CA 6240 Ohmmeter, 1 μΩ, 4 Wire RS stock no. 523-392 Mfr. Part No. P01143200 Subtotal (1 unit) R 62 098,18(exc. VAT) R 62 098,18/unit Quantity	Chauvin Arnoux	-	-	Ohmmeter	-	1μΩ	4 Wire	-	-	Rechargeable Nickel-Metal Hydride	Battery	-	5kg	280mm	273mm	-	-	+0.25% + 2 digits	-	CA 6240	-	No	247mm	±0.25% + 2 digits
Currently unavailable Aim-TTi BS407 Ohmmeter, 20 kΩ Max, 1 μΩ, 4 Wire RS stock no. 424-4383 Mfr. Part No. BS407 Subtotal (1 unit) R 19 116,70(exc. VAT) R 19 116,70/unit Quantity	Aim-TTi	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
In Stock Megger DLRO10 Handheld Ohmmeter, 100 nΩ, Low Resistance RS stock no. 910-6801 Mfr. Part No. 1006-598 Subtotal (1 unit) R 92 971,75(exc. VAT) R 92 971,75/unit Quantity	Megger	Handheld	-	Ohmmeter	-	100nΩ	Low Resistance	-	-	Rechargeable Nickel-Metal Hydride	Mains, Battery	-	2.6kg	237mm	220mm	5°C	Type F, 3-Pin (Global)	0.2 %	45°C	DLRO10	-	IEC 61326-1	100mm	±0.2 %
In Stock Extech 380462 Ohmmeter, 2000 mΩ Max, Low Resistance RS stock no. 288-0121 Mfr. Part No. 380462 Subtotal (1 unit) R 10 846,12(exc. VAT) R 10 846,12/unit Quantity	Extech	-	2000mΩ	Ohmmeter	-	-	Low Resistance	-	-	-	220 V ac, 110 V ac	-	1.5lb	-	6.3in	-	-	0.75 %	-	380462	-	No	2.8in	-0.75 % rdg
In Stock Extech Ohmmeter, 0.1 mΩ, 4 Wire RS stock no. 267-5658 Mfr. Part No. 380580 Subtotal (1 unit) R 20 550,51(exc. VAT) R 20 550,51/unit Quantity	Extech	-	-	Ohmmeter	-	0.1mΩ	4 Wire	40h	-	AA	Battery	-	1.5kg	190mm	110mm	-	-	-	-	-	-	CE	250mm	-0.75 % rdg
In Stock Megger DLRO10HD Handheld Ohmmeter, 2.5 kΩ Max, 100 nΩ, Low Resistance RS stock no. 910-6804 Mfr. Part No. 1006-603 Subtotal (1 unit) R 82 618,65(exc. VAT) R 82 618,65/unit Quantity	Megger	Handheld	2.5kΩ	Ohmmeter	-	100nΩ	Low Resistance	-	-	-	Mains, Battery	-	6.7kg	-	-	-10°C	-	0.2 %	50°C	DLRO10HD	-	IEC 61326-1	-	-0.2 %
Stocked by manufacturer Extech 380460 Ohmmeter, 2000 mΩ Max, Low Resistance RS stock no. 288-0119 Mfr. Part No. 380460 Subtotal (1 unit) R 10 615,31(exc. VAT) R 10 615,31/unit Quantity	Extech	-	2000mΩ	Ohmmeter	-	-	Low Resistance	-	-	-	110 V ac, 220 V ac	-	1.5lb	-	6.3in	-	-	0.75 %	-	380460	-	NIST	2.8in	-0.75 % rdg
Currently unavailable Teledyne LeCroy Ohmmeter, 5 mΩ Max, 0.1 μΩ, 4 Wire, 4 Wire RS stock no. 245-5565 Mfr. Part No. T3MIL50 Subtotal (1 unit) R 26 732,73(exc. VAT) R 26 732,73/unit Quantity	Teledyne LeCroy	-	5mΩ	Ohmmeter	-	0.1μΩ	4 Wire, 4 Wire	-	-	-	100 to 240 V ac	-	3kg	107mm	283mm	0°C	-	0.05 %	40°C	-	-	IEC 61000-4-7	223mm	0.2 %
In Stock Cropico Handheld Ohmmeter, 4 Wire RS stock no. 480-6947 Mfr. Part No. DO4000 Subtotal (1 unit) R 18 312,87(exc. VAT) R 18 312,87/unit Quantity	Cropico	Handheld	-	Ohmmeter	-	-	4 Wire	-	-	AA	Battery	-	800g	130mm	55mm	0°C	-	0.05 %	40°C	-	-	EN 61010-1 EMC-EN 61236	215mm	±0.05 %
In Stock Megger DLRO2 Handheld Ohmmeter, 1 μΩ, Low Resistance RS stock no. 205-0428 Mfr. Part No. 1012-280 Subtotal (1 unit) R 59 946,66(exc. VAT) R 59 946,66/unit Quantity	Megger	Handheld	-	Ohmmeter	-	1μΩ	Low Resistance	4h	-	AA	Battery	-	905g	228mm	105mm	0°C	-	±10 %	50°C	DLRO2	-	EN 61010, IEC 61010-031: 2015, IEC 61010-030, IEC61326-1, industrial specification IEC61326-2-2, IP54 to IEC60529	75mm	±1 %