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 Components 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.


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Description Price Tester Type Minimum Test Voltage Maximum Test Voltage Maximum Insulation Resistance Measurement Display Type Calibrated Test Current Battery Life Minimum Operating Temperature Maximum Operating Temperature Power Source Safety Category Level Safety Category Voltage Safety Category
RS Stock No. 921-4526
Mfr. Part No.1004-739
BrandMegger
€660.00
Each
units
Insulation Tester 10V 1000V 200GΩ Analogue, Dual Digital - 205mA 2200 (OFF) Test @ 55 s, 2200 (ON) Test @ 5 s -20°C +55°C Battery CAT IV 600V CAT IV 600V
RS Stock No. 921-8749
Mfr. Part No.1006-339
BrandMegger
€728.00
Each
units
Insulation Tester 10V 1000V 200GΩ Analogue, Dual Digital RSCAL 205mA 2200 (OFF) Test @ 55 s, 2200 (ON) Test @ 5 s -20°C +55°C Battery CAT IV 600V CAT IV 600V
RS Stock No. 921-8742
Mfr. Part No.1006-339
BrandMegger
€743.00
Each
units
Insulation Tester 10V 1000V 200GΩ Analogue, Dual Digital UKAS 205mA 2200 (OFF) Test @ 55 s, 2200 (ON) Test @ 5 s -20°C +55°C Battery CAT IV 600V CAT IV 600V
RS Stock No. 528-9337
Mfr. Part No.FLUKE 1507
BrandFluke
€629.00
Each
units
Insulation & Continuity Tester 50V 1000V 10GΩ - UKAS 200mA - -20°C +55°C Battery CAT III, CAT IV 600V CAT III 600 V, CAT IV 600V
RS Stock No. 528-9321
Mfr. Part No.FLUKE 1507
BrandFluke
€614.00
Each
units
Insulation & Continuity Tester 50V 1000V 10GΩ - RSCAL 200mA - -20°C +55°C Battery CAT III, CAT IV 600V CAT III 600 V, CAT IV 600V
RS Stock No. 518-6008
Mfr. Part No.FLUKE 1507
BrandFluke
€546.00
Each
units
Insulation Tester 50V 1000V 10GΩ - - 200mA - -20°C +55°C Battery CAT III, CAT IV 600V CAT III 600 V, CAT IV 600V
RS Stock No. 905-5920
Mfr. Part No.FLUKE-1587 FC
BrandFluke
€834.00
Each
units
Insulation Tester 50V 1000V 2GΩ Backlit LCD - 1mA 1000 h -20°C +55°C Battery CAT III, CAT IV 600 V, 1000 V CAT III 1000 V, CAT IV 600V
RS Stock No. 905-7011
Mfr. Part No.FLUKE-1587 FC
BrandFluke
€917.00
Each
units
Insulation Tester 50V 1000V 2GΩ Backlit LCD UKAS 1mA 1000 h -20°C +55°C Battery CAT III, CAT IV 600 V, 1000 V CAT III 1000 V, CAT IV 600V
RS Stock No. 905-7002
Mfr. Part No.FLUKE-1587 FC
BrandFluke
€902.00
Each
units
Insulation Tester 50V 1000V 2GΩ Backlit LCD RSCAL 1mA 1000 h -20°C +55°C Battery CAT III, CAT IV 600 V, 1000 V CAT III 1000 V, CAT IV 600V
RS Stock No. 528-9343
Mfr. Part No.FLUKE 1503
BrandFluke
€507.00
Each
units
Insulation Tester 500V 1000V 2GΩ Graphic Display - Backlit RSCAL 200mA - -20°C +55°C Battery CAT III, CAT IV 600V CAT III 600 V, CAT IV 600V
RS Stock No. 528-9359
Mfr. Part No.FLUKE 1503
BrandFluke
€522.00
Each
units
Insulation Tester 500V 1000V 2GΩ Graphic Display - Backlit UKAS 200mA - -20°C +55°C Battery CAT III, CAT IV 600V CAT III 600 V, CAT IV 600V
RS Stock No. 518-5998
Mfr. Part No.FLUKE 1503
BrandFluke
€439.00
Each
units
Insulation Tester 500V 1000V 2GΩ Graphic Display - Backlit - 200mA - -20°C +55°C Battery CAT III, CAT IV 600V CAT III 600 V, CAT IV 600V
RS Stock No. 535-3191
Mfr. Part No.MIT230-EN
BrandMegger
€430.00
Each
units
Insulation & Continuity Tester 250V 1000V dc 999MΩ LCD - 200mA 3000 5-Second Tests -10°C +55°C Battery CAT III 300V CAT III 300V
RS Stock No. 535-6493
Mfr. Part No.MIT230
BrandMegger
€513.00
Each
units
Insulation & Continuity Tester 250V dc 1000V dc 999MΩ LCD UKAS 200mA 3000 5-Second Tests -10°C +55°C Battery CAT III 300V CAT III 300V
RS Stock No. 535-6487
Mfr. Part No.MIT230
BrandMegger
€498.00
Each
units
Insulation & Continuity Tester 250V dc 1000V dc 999MΩ LCD RSCAL 200mA 3000 5-Second Tests -10°C +55°C Battery CAT III 300V CAT III 300V
RS Stock No. 535-6465
Mfr. Part No.MIT220
BrandMegger
€453.00
Each
units
Insulation & Continuity Tester 250V dc 500V dc 999MΩ LCD RSCAL 200mA 3000 5-Second Tests -10°C +55°C Battery CAT III 300V CAT III 300V
RS Stock No. 535-6471
Mfr. Part No.MIT220
BrandMegger
€468.00
Each
units
Insulation & Continuity Tester 250V dc 500V dc 999MΩ LCD UKAS 200mA 3000 5-Second Tests -10°C +55°C Battery CAT III 300V CAT III 300V
RS Stock No. 535-3185
Mfr. Part No.MIT220-EN
BrandMegger
€385.00
Each
units
Insulation & Continuity Tester 250V 500V dc 999MΩ LCD - 200mA 3000 5-Second Tests -10°C +55°C Battery CAT III 300V CAT III 300V
RS Stock No. 719-0917
Mfr. Part No.450A920
€3,426.80
Each
units
Flash Tester 250V 5000 V ac, 6000V dc 999.9MΩ Analogue - 20mA - 0°C +40°C Mains - - -
RS Stock No. 516-7681
Mfr. Part No.MIT300-EN
BrandMegger
€455.00
Each
units
Insulation & Continuity Tester 250V 500V dc 999MΩ LCD - 1mA 5000 5-Second Tests -10°C +60°C Battery CAT III 600V CAT III 600V