Insulation Testers

Insulation testers are the ideal tool for preventative or predictive maintenance programs designed to identify potential equipment failures before they occur. They are perfect for testing a wide range of high voltage equipment including switchgear, motors, generators and cables.

Ideally all 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 typically 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.

Testing the integrity of insulation requires measuring its resistance to current flow across it. 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?

A quality control measure at the time a piece of electrical equipment is produced.
An installation requirement to help ensure specifications are met and to verify proper hook-up
A periodic preventive maintenance task
A troubleshooting tool

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. 123-3387
BrandRS PRO
£331.54
Each
Units
Insulation Multimeter 50V 1000V 20GΩ Auto Backlit Analog Bar Graph Display UKAS - 1100 (times of insulation tests) 0°C +50°C Battery CAT IV 600V CAT IV 600 V
RS Stock No. 123-3386
BrandRS PRO
£311.54
Each
Units
Insulation Multimeter 50V 1000V 20GΩ Auto Backlit Analog Bar Graph Display RSCAL - 1100 (times of insulation tests) 0°C +50°C Battery CAT IV 600V CAT IV 600 V
RS Stock No. 123-3220
BrandRS PRO
£262.54
Each
Units
Insulation Multimeter 50V 1000V 20GΩ Auto Backlit Analog Bar Graph Display - - 1100 (times of insulation tests) 0°C +50°C Battery CAT IV 600V CAT IV 600 V
RS Stock No. 123-1931
BrandRS PRO
£111.24
Each
Units
Insulation Tester 250V 1000V 2GΩ LCD - ≤200mA - 0°C +40°C Battery CAT III 1000V CAT III 1000 V
RS Stock No. 123-1955
BrandRS PRO
£160.24
Each
Units
Insulation Tester 250V 1000V 2000MΩ LCD RSCAL ≤200mA - 0°C +40°C Battery CAT III 1000V CAT III 1000 V
RS Stock No. 123-1956
BrandRS PRO
£180.24
Each
Units
Insulation Tester 250V 1000V 2000MΩ LCD UKAS ≤200mA - 0°C +40°C Battery CAT III 1000V CAT III 1000 V
RS Stock No. 917-6298
BrandRS PRO
£966.86
Each
Units
Insulation Tester 50V 1000V 9.5GΩ LCD - Dot Matrix - - - 0°C +40°C Mains - - -
RS Stock No. 123-1934
BrandRS PRO
£142.14
Each
Units
Insulation Tester 125V 1000V 4GΩ LCD - 1mA - 0°C +40°C Battery CAT III 1000V CAT III 1000 V
RS Stock No. 123-1970
BrandRS PRO
£211.14
Each
Units
Insulation Tester 125V 1000V 4000MΩ LCD UKAS 1mA - 0°C +40°C Battery CAT III 1000V CAT III 1000 V
RS Stock No. 123-1969
BrandRS PRO
£191.14
Each
Units
Insulation Tester 125V 1000V 4000MΩ LCD RSCAL 1mA - 0°C +40°C Battery CAT III 1000V CAT III 1000 V
RS Stock No. 123-2237
BrandRS PRO
£182.41
Each
Units
Insulation Tester 250V 1000V 4GΩ LCD - 1mA - 0°C +40°C Battery - - -
RS Stock No. 123-2329
BrandRS PRO
£251.41
Each
Units
Insulation Tester 250V 1000V 4000MΩ LCD UKAS 1mA - 0°C +40°C Battery - - -
RS Stock No. 123-2328
BrandRS PRO
£231.41
Each
Units
Insulation Tester 250V 1000V 4000MΩ LCD RSCAL 1mA - 0°C +40°C Battery - - -
RS Stock No. 917-6294
BrandRS PRO
£3,689.46
Each
Units
Insulation Tester 50V 1000V 50GΩ LCD - Dot Matrix - - - 0°C +40°C Mains - - -
RS Stock No. 917-6308
BrandRS PRO
£1,961.00
Each
Units
Insulation Tester 50V 1000V 9.5GΩ LCD - Dot Matrix - - - 0°C +40°C Mains - - -
RS Stock No. 161-1630
BrandRS PRO
£156.49
Each
Units
Insulation Resistance Tester 125V 1000V 4GΩ LCD - 1mA - +5°C +40°C Battery - 600 V, 1000 V CAT III, CAT IV
New
RS Stock No. 201-0446
BrandRS PRO
£1,456.40
Each
Units
Insulation Tester 50V 1200V - TFT LCD - - - - - Mains CAT I - CAT I
RS Stock No. 177-4976
BrandRS PRO
£299.00
1 Kit
Kit(s)
Insulation Tester - 1000V 40MΩ LCD - 0.35mA - +5°C +40°C Battery CAT III, CAT IV 600 V, 1000 V CAT III 1000 V, CAT IV 600 V
New
RS Stock No. 201-0450
BrandRS PRO
£2,785.66
Each
Units
Insulation Tester 50V 1200V - TFT LCD - - - - - Mains CAT I - CAT I
New
RS Stock No. 201-0449
BrandRS PRO
£1,986.40
Each
Units
Insulation Tester 50V 1200V - TFT LCD - - - - - Mains CAT I - CAT I
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