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Insulation Testers

Insulation testers are electrical measurement test tools used for preventative or predictive maintenance programs. Also known as megohmmeters they are designed to identify potential equipment failures before they occur. Insulation resistance testers are perfect for testing a wide range of high voltage equipment including switchgear, motors, generators and cables.

RS offer a range of high-quality electrical test tools from leading brands including Megger, Fluke, Chauvin Arnoux, Keysight Technologies, Metrohm, FLIR and of course RS PRO.

We also offer an in-house calibration service. See here for more details calibration services

Insulation tester types

Insulation testers are handheld devices but can be portable with a handle or bench mounted. Testers usually have an LCD or digital display, but some have the more traditional analogue needle such as the Megger MIT310A.

How do insulation resistance testers work?

Testing the integrity of insulation requires measuring its resistance to current flow across it. Testers use high voltage low current DC charge to measure the resistance. A high level of resistance means that very little current is escaping through the insulation. Conversely, a low level of resistance indicates a significant amount of current may be leaking through and along the insulation.

What is the purpose of insulation testing?

Ideally, all the electrical current sent along a conductive wire should reach its intended destination. However, you do find that some of it is lost along the way due to various reasons. Wires are insulated with a resistant sheathing to contain the conductivity of the copper or aluminium core, but even with this insulation in place, some of the current still manages to escape. The electricity that leaks out can be detrimental to electrical circuits and machinery.

Testing can help you determine whether the insulation is performing at an effective and safe level. Excessive heat or cold, moisture, vibration, dirt, oil and corrosive vapours can all contribute to deterioration therefore routine testing can identify problems before they result in injury or equipment failure.

Insulation testers provide noise-free, reliable results. They are safe and easy to use and the ideal solution for troubleshooting, commissioning and preventative maintenance applications.

116 Products showing for Insulation Testers

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Stocked by manufacturer Socomec Insulation monitoring, 24 V ac/dc Min, 1 kV Max, 0.01 GΩ RS stock no. 702-226 Mfr. Part No. 47359511 Subtotal (1 unit) R 141 501,81(exc. VAT) R 141 501,81/unit Quantity	Socomec	-	-	Insulation Monitor	Insulation monitoring	24V ac/dc	1kV	Graphic Display	-	-	-	-	24/240 V ac /V dc	-	-	0.01GΩ	-	-	-	-	93mm	180mm	IEC 61557-9	108mm	-	-
Temporarily out of stock Megger Advanced PAT, 500 V Min, 10 V Max, 30 TΩ CAT IV RS stock no. 718-510 Mfr. Part No. 1016-094 Subtotal (1 unit) R 103 635,11(exc. VAT) R 103 635,11/unit Quantity	Megger	-	-	Insulation Tester	Advanced PAT	500V	10V	Colour Display Screen	-	6mA	4.5h	Lithium-ion	AC Mains	-20°C	50°C	30TΩ	UK	-	CAT IV	600V	181mm	315mm	IEC 61010-1	285mm	-	-
Temporarily out of stock Chauvin Arnoux MH401 Insulation Tester, 250 V Min, 1 kV Max, 2000 mΩ CAT III RS stock no. 225-8960 Mfr. Part No. P06234101 Subtotal (1 unit) R 6 330,05(exc. VAT) R 6 330,05/unit Quantity	Chauvin Arnoux	MH401	-	Insulation Tester	Insulation Tester	250V	1kV	LCD	-	1mA	-	1.5V AA	Battery	0°C	40°C	2000mΩ	-	-	CAT III	300V	-	-	IEC 61010-1	-	-	-
In Stock Extech 380320 Insulation Tester, 250 V Min, 1 kV Max, 400 MΩ CAT III RS stock no. 288-0113 Mfr. Part No. 380320 Subtotal (1 unit) R 5 427,91(exc. VAT) R 5 427,91/unit Quantity	Extech	380320	-	Insulation Tester	Insulation Tester	250V	1kV	Analogue	-	1.3mA	-	AA	Battery	-	-	400MΩ	-	-	CAT III	1kV	50mm	200mm	CE	92mm	-	-
In Stock Chauvin Arnoux CA 6555 Insulation Tester, 40 V Min, 15 kV Max CAT IV RS stock no. 237-2906 Mfr. Part No. P01139716 Subtotal (1 unit) R 128 083,26(exc. VAT) R 128 083,26/unit Quantity	Chauvin Arnoux	CA 6555	-	Insulation Tester	Insulation Tester	40V	15kV	LCD	-	1mA	-	-	Mains, Battery	0°C	30°C	-	-	-	CAT IV	1kV	-	-	BS EN 61010031, IEC/EN 610102030, BS EN 610102030, IEC/EN 61010031	-	-	-
In Stock Facom BC.TGVEPF Insulation Tester RS stock no. 255-6081 Mfr. Part No. BC.TGVEPF Subtotal (1 unit) R 5 261,80(exc. VAT) R 5 261,80/unit Quantity	Facom	BC.TGVEPF	-	Insulation Tester	Insulation Tester	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	135mm	135mm	No	125mm	-	-
In Stock Chauvin Arnoux CA 6505 Insulation Tester, 40 V Min, 5100 V Max, 10 TΩ CAT III RS stock no. 237-2904 Mfr. Part No. P01139714 Subtotal (1 unit) R 54 151,81(exc. VAT) R 54 151,81/unit Quantity	Chauvin Arnoux	CA 6505	-	Insulation Tester	Insulation Tester	40V	5100V	LCD	-	-	30days	Nickel-Metal Hydride	Battery	-	-	10TΩ	-	-	CAT III	2500V	80mm	270mm	IEC 61557, IEC 610101	250mm	-	-
In Stock Gossen Metrawatt M550S Insulation Tester, 50 V Min, 1 kV Max, 999 GΩ Flat Countersunk RS stock no. 645-138 Mfr. Part No. M550S Subtotal (1 unit) R 32 793,53(exc. VAT) R 32 793,53/unit Quantity	Gossen Metrawatt	M550S	-	Insulation Tester	Insulation Tester	50V	1kV	Backlight	-	-	-	Alkaline manganese per IEC LR14 or rechargeable batteries (NiMH, 1.5 V migNon-cell (size AA)	8 Batteries (1.5 V AA)	-10°C	50°C	999GΩ	-	-	Flat Countersunk	1kV	140mm	225mm	EN 1081, IEC/EN 61557, VDE 0470-1, IEC/EN 61010-1, DIN EN 61326-1, EN 60529, VDE 0413	130mm	-	-
Stocked by manufacturer Fluke 1550C Insulation Tester, 250 V Min, 5 kV Max, 1 TΩ CAT IV, CAT III RS stock no. 705-1957 Mfr. Part No. FLUKE 1550C Subtotal (1 unit) R 110 000,00(exc. VAT) R 110 000,00/unit Quantity	Fluke	1550C	-	Insulation Tester	Insulation Tester	250V	5kV	LCD	-	2mA	750Tests	Rechargeable Lead Acid (Yuasa NP2.8-12)	Battery	-20°C	50°C	1TΩ	-	-	CAT IV, CAT III	600V, 1V	160mm	277mm	CE, CSA	269mm	-	-
Stocked by manufacturer Schneider Electric IMDIFL12LMC Insulation Tester, 24 V Min, 480 V ac/dc Max RS stock no. 357-760 Mfr. Part No. IMDIFL12LMC Subtotal (1 unit) R 53 015,41(exc. VAT) R 53 015,41/unit Quantity	Schneider Electric	IMDIFL12LMC	-	Insulation Tester	Insulation Tester	24V	480V ac/dc	Digital Display	-	-	-	-	-	-25°C	55°C	-	-	-	-	-	59mm	110mm	IEC 60364441 IEC 610101 IEC 60364551 IEC 615579 EAC(RETURN)DNVGL(RETURN)CE(RETURN)UL(RETURN)cULus	108mm	-	-
Temporarily out of stock Megger Insulation Resistance Tester, 500 V Min, 10 kV Max, 30 TΩ CAT IV RS stock no. 718-507 Mfr. Part No. 1016-089 Subtotal (1 unit) R 85 921,09(exc. VAT) R 85 921,09/unit Quantity	Megger	-	-	Insulation Tester	Insulation Resistance Tester	500V	10kV	Analogue	-	3mA	4.5h	Lithium-ion	Mains Supply	-20°C	50°C	30TΩ	-	-	CAT IV	600V	181mm	315mm	IEC 61010-031:2008	285mm	-	-
In Stock Megger Advanced PAT, 500 V Min, 10 kV Max CAT IV RS stock no. 718-511 Mfr. Part No. 1016-097 Subtotal (1 unit) R 103 679,21(exc. VAT) R 103 679,21/unit Quantity	Megger	-	-	Test Box	Advanced PAT	500V	10kV	LCD	-	-	4.5h	Lithium-ion	47 Hz to 63 Hz, Lithium-ion Battery	-20°C	50°C	-	-	-	CAT IV	-	181mm	315mm	IEC 61010-1	285mm	-	-
Last RS stock Megger MIT320 Insulation & Continuity Tester, 250 V Min, 1000 V dc Max, 999 CAT III RS stock no. 620-4062 Mfr. Part No. MIT320-FR Subtotal (1 unit) R 19 014,13(exc. VAT) R 19 014,13/unit Quantity	Megger	MIT320	-	Insulation Tester	Insulation & Continuity Tester	250V	1000V dc	Digital	-	1mA	-	AA	Battery	-10°C	60°C	999	-	-	CAT III	600V	78mm	203mm	No	148mm	-	-
In Stock Chauvin Arnoux CA 6550 Insulation Tester, 40 V Min, 10 kV Max CAT IV RS stock no. 237-2905 Mfr. Part No. P01139715 Subtotal (1 unit) R 112 578,05(exc. VAT) R 112 578,05/unit Quantity	Chauvin Arnoux	CA 6550	-	Insulation Tester	Insulation Tester	40V	10kV	LCD	-	-	2h	-	Battery	-	-	-	-	-	CAT IV	1kV	200mm	340mm	CE	300mm	-	-
Temporarily out of stock Schneider Electric IMDIFL12, 1 kV Max RS stock no. 273-2125 Mfr. Part No. IMDIFL12 Subtotal (1 unit) R 56 336,74(exc. VAT) R 56 336,74/unit Quantity	Schneider Electric	IMDIFL12	-	Insulation Tester	-	-	1kV	Analogue	-	-	-	-	Mains	-25°C	55°C	-	-	-	-	-	110mm	108mm	IEC 60364441, IEC 610101, IEC 60364551, IEC 615579	59mm	-	-
Temporarily out of stock Seaward Clare H101 Hipot Tester, 250 V Min, 1 kV Max, 999.9 RS stock no. 719-0917 Mfr. Part No. 450A920 Subtotal (1 unit) R 72 762,02(exc. VAT) R 72 762,02/unit Quantity	Seaward Clare	H101	-	Insulation Tester	Hipot Tester	250V	1kV	Analogue	-	20mA	-	-	Mains	0°C	40°C	999.9	-	-	-	-	300mm	370mm	No	200mm	-	-
In Stock Megger MIT230 Insulation & Continuity Tester, 250 V Min, 1000 V dc Max CAT III RS stock no. 535-3191 Mfr. Part No. MIT230-EN Subtotal (1 unit) R 12 912,42(exc. VAT) R 12 912,42/unit Quantity	Megger	MIT230	-	Insulation Tester	Insulation & Continuity Tester	250V	1000V dc	LCD	-	200mA	-	AA	Battery	-10°C	55°C	-	-	-	CAT III	300V	40mm	195mm	IEC 61326-1	98mm	-	-
Temporarily out of stock Omron K7GE-MGMA Insulation Resistance Tester RS stock no. 239-8223 Mfr. Part No. K7GE-MGMA Subtotal (1 unit) R 16 079,40(exc. VAT) R 16 079,40/unit Quantity	Omron	K7GE-MGMA	-	Insulation Tester	Insulation Resistance Tester	-	-	LCD	-	-	-	-	-	-20°C	65°C	-	-	-	-	-	-	-	CE, EN/IEC 61326-1, CAN/CSA-C22.2 No.61010-1, UL 61010-1	-	-	-
Temporarily out of stock Omron K7GE-MGMA Insulation Resistance Tester RS stock no. 239-8224 Mfr. Part No. K7GE-MGMD Subtotal (1 unit) R 16 079,55(exc. VAT) R 16 079,55/unit Quantity	Omron	K7GE-MGMA	-	Insulation Tester	Insulation Resistance Tester	-	-	LCD	-	-	-	-	-	-20°C	65°C	-	-	-	-	-	-	-	EN/IEC 61326-1, CAN/CSA-C22.2 No.61010-1, CE, UL 61010-1	-	-	-
Stocked by manufacturer Chauvin Arnoux MX604 Insulation Tester, 50 V Min, 500 V Max, 2000 CAT III RS stock no. 229-8921 Mfr. Part No. MX0604 Subtotal (1 unit) R 22 672,92(exc. VAT) R 22 672,92/unit Quantity	Chauvin Arnoux	MX604	-	Insulation Tester	Insulation Tester	50V	500V	Analogue	-	200mA	-	LR03	1.5 V Battery	0°C	45°C	2000	-	-	CAT III	300V	155mm	-	IEC 61010 safety standard	98mm	-	-