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 Test Current Battery Life Minimum Operating Temperature Maximum Operating Temperature Power Source Safety Category Level Safety Category Voltage Safety Category Battery Type
RS Stock No. 123-2237
BrandRS PRO
$368.05
Each
units
Insulation Tester 250V 1000V 4GΩ LCD 1mA - 0°C +40°C Battery - - - AA
RS Stock No. 123-3220
BrandRS PRO
$474.94
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 Alkaline
RS Stock No. 161-1630
BrandRS PRO
$423.08
Each
units
Insulation Resistance Tester 125V 1000V 4GΩ LCD 1mA - +5°C +40°C Battery - 600 V, 1000 V CAT III, CAT IV 1.5 V AAA, 9V NEDA 1604
RS Stock No. 123-1934
BrandRS PRO
$269.01
Each
units
Insulation Tester 125V 1000V 4GΩ LCD 1mA - 0°C +40°C Battery CAT III 1000V CAT III 1000 V AA
RS Stock No. 123-1931
BrandRS PRO
$211.09
Each
units
Insulation Tester 250V 1000V 2GΩ LCD ≤200mA - 0°C +40°C Battery CAT III 1000V CAT III 1000 V AA
RS Stock No. 2552269652
Mfr. Part No.RS5500 AU Std CAL
BrandRS PRO
$302.80
Each
units
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RS Stock No. 2552269666
Mfr. Part No.IIT1500 AU Std CAL
BrandRS PRO
$576.00
Each
units
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RS Stock No. 2552269653
Mfr. Part No.RS5505 AU Std CAL
BrandRS PRO
$362.40
Each
units
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RS Stock No. 516-7681
Mfr. Part No.MIT300-EN
BrandMegger
$762.30
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 600 V AA
RS Stock No. 447-7606
Mfr. Part No.3132A
BrandKyoritsu
$421.67
Each
units
Insulation & Continuity Tester 250V 1000V 400MΩ Analogue 200mA - - - Battery CAT III 600V CAT III 600 V AA
RS Stock No. 518-6008
Mfr. Part No.FLUKE 1507
BrandFluke
$1,144.00
Each
units
Insulation & Continuity Tester 50V 1000V 10GΩ - 200mA - -20°C +55°C Battery CAT III, CAT IV 600V CAT III 600 V, CAT IV 600 V AA
RS Stock No. 905-5920
Mfr. Part No.FLUKE-1587 FC
BrandFluke
$1,637.90
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 600 V AA, NEDA 15A
RS Stock No. 535-3191
Mfr. Part No.MIT230-EN
BrandMegger
$952.60
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 300 V AA
RS Stock No. 516-7697
Mfr. Part No.MIT310-EN
BrandMegger
$897.60
Each
units
Insulation & Continuity Tester 250V 1000V dc 999MΩ LCD 1mA 5000 5-Second Tests -10°C +60°C Battery CAT III 600V CAT III 600 V AA
RS Stock No. 518-5998
Mfr. Part No.FLUKE 1503
BrandFluke
$889.90
Each
units
Insulation Resistance Tester 500V 1000V 2GΩ Graphic Display - Backlit 200mA - -20°C +55°C Battery CAT III, CAT IV 600V CAT III 600 V, CAT IV 600 V AA
RS Stock No. 122-6801
Mfr. Part No.1006-767
BrandMegger
$1,985.50
Each
units
Insulation Tester - - 200GΩ - - 3000 5-Second Tests - - Battery CAT IV - - AA
RS Stock No. 820-2976
Mfr. Part No.U1461A
$1,525.33
Each
units
Insulation Tester 50V 1000V 260GΩ OLED 1mA 160 h -40°C +55°C Battery CAT III, CAT IV 1000 V, 600 V CAT III 1000 V, CAT IV 600 V AA
RS Stock No. 516-7704
Mfr. Part No.MIT310A-EN
BrandMegger
$871.20
Each
units
Insulation & Continuity Tester 250V 1000V dc 999MΩ Analogue 1mA 5000 5-Second Tests -10°C +60°C Battery CAT III 600V CAT III 600 V AA
RS Stock No. 535-3185
Mfr. Part No.MIT220-EN
BrandMegger
$789.80
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 300 V AA
RS Stock No. 122-6799
Mfr. Part No.1006-755
BrandMegger
$1,768.80
Each
units
Insulation Tester 50V 1000V 100GΩ Digital 20 mA @ 10.0 Ω → 99.9 Ω, 205 mA @ 0.01 Ω → 9.99 Ω 2200 5-Second Tests -20°C +55°C Battery CAT IV 600V CAT IV 600 V Alkaline, NiMH
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