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Insulation Testers

Showing 32 of 48 items

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  1. DT-5503 Analogue Insulation Tester

    DT-5503 Analogue Insulation Tester

    inc VAT £118.80 ex VAT £99.00
    In Stock - Available Next Day
    • Provides the actual AC voltage measurements of the mains supply
    • Incorporated live circuit warning function for increased safety
    • Three insulation test ranges - 250V, 500V and 1000V
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  2. CEM dt5500 Electrical Insulation Tester full on

    Electrical Insulation Tester

    inc VAT £118.80 ex VAT £99.00
    In Stock - Available Next Day
    Excellent value electrical insulation and continuity tester. Tests at 1000V, 500V or 250V complete with carry case, leads, batteries etc.
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  3. Extech 380320 Analog Insulation Tester

    Extech 380320 Analogue Insulation Tester

    inc VAT £180.00 ex VAT £150.00
    Typically ships in 7-10 working days
    • Tests insulation and voltage with easy to read analogue display
    • Three test voltages 250V, 500V, and 1000V
    • Insulation Resistance to 400MΩ
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  4. Extech 380260 Autoranging Digital Megohmmeter

    Extech 380260 Autoranging Digital Megohmmeter

    inc VAT £204.00 ex VAT £170.00
    In Stock - Available Next Day
    • Insulation resistance testing to 2000MΩ
    • 250V, 500V, and 1000V test voltages and continuity testing
    • Extra durable design with backlit super-sized dual display
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  5. Martindale IN2101 500V Insulation Tester

    Martindale IN2101 500V Insulation Tester

    inc VAT £208.20 ex VAT £173.50
    Discontinued
    The Martindale IN2101 500V Battery Powered Insulation tester with 4000 count backlit display, auto hold, auto discharge and CAT III compliant.
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  6. Martindale IN2102 1000V Insulation tester

    Martindale IN2102 1000V Insulation tester

    inc VAT £238.80 ex VAT £199.00
    Discontinued
    The Martindale IN2102 1000V Insulation tester with 250V & 500V test settings. Backlit display, auto hold, auto discharge and CAT III compliant.
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  7. Megger MIT220 Insulation and Continuity Tester

    Megger MIT220 Insulation and Continuity Tester

    inc VAT £246.00 ex VAT £205.00
    In Stock - Available Next Day
    A compact digital/analogue insulation tester upto 1000MOhm and automatic continuity testing at 200mA. Live circuit warning and test lead zero function
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  8. Extech MG320 Insulation Multimeter

    Extech MG320 Insulation Multimeter

    inc VAT £265.20 ex VAT £221.00
    In Stock - Available Next Day
    • Insulation resistance measurement up to 20GΩ with 50V to 1000V test voltage
    • Multimeter functions such AC/DC voltage, resistance, and continuity testing
    • Save up to 99 readings alongside custom test configurations
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  9. Brymen BM887 Insulation Multimeter

    Brymen BM887 Insulation Multimeter

    inc VAT £286.80 ex VAT £239.00
    Typically ships in 2-4 weeks
    • Test voltages from 50V to 1000V to measure insulation resistance from 3MΩ to 25GΩ
    • Further digital multimeter functions such as AC/DC voltage, current, temperature and frequency
    • The ideal combination tester to White Goods and Appliance repairs
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  10. Fluke 1503 Insulation Resistance Tester

    Fluke 1503 Insulation Resistance Tester

    inc VAT £294.00 ex VAT £245.00
    Typically ships in 5-7 working days
    • Insulation resistance measurement range of 0.1MΩ to 2000MΩ
    • AC/DC voltage measurement, continuity test, and earth bond resistance testing
    • Auto-discharge of capacitive voltage and test inhibition in presence of voltage
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  11. Socket & See IRC PRO Insulation and Continuity Tester

    Socket & See IRC PRO Insulation and Continuity Tester

    inc VAT £298.80 ex VAT £249.00
    Typically ships in 2-4 working days
    • Three insulation test ranges: 250V, 500V and 1000V
    • Auto Ranging Continuity up to 19.99 kΩ
    • Handsfree capabilities
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  12. Brymen BM878 Insulation Multimeter

    Brymen BM878 Insulation Tester / DMM Multimeter

    inc VAT £298.80 ex VAT £249.00
    In Stock - Available Next Day
    • Insulation test voltages of 50V to 1000V and 200mA Continuity Test
    • Multimeter functions such measurement for voltage, current, capacitance, temperature and more
    • The ideal combination tester to White Goods and Appliance repairs
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  13. Megger MIT230 Insulation and Continuity Tester

    Megger MIT230 Insulation and Continuity Tester

    inc VAT £310.80 ex VAT £259.00
    Typically ships in 5-7 working days
    A compact digital/analogue 1000V, 500V or 250V insulation tester up to 1000M ohm and automatic continuity testing at 200mA. Comes with a calibration certificate, carry case, batteries and a test lead set with prods and crocodile clips.
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  14. Kewtech KT300 Digital Insulation/Continuity Tester

    Kewtech KT300 Digital Insulation/Continuity Tester

    inc VAT £322.80 ex VAT £269.00
    In Stock - Available Next Day
    • Performs highly accurate insulation and continuity tests
    • Multiple features to ensure error-free results
    • Ergonomically designed for comfortable hand-held use
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  15. Megger MIT300 Insulation and Continuity Tester

    Megger MIT300 Insulation and Continuity Tester

    inc VAT £322.80 ex VAT £269.00
    Typically ships in 7-10 working days
    The Megger MIT300 Insulation and Continuity tester comes with a 3 Year Warranty & Calibration Certificate. Tests insulation resistance at 250V or 500V. Extremely rugged and weatherproof IP54.
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  16. Megger MIT310A Analogue Insulation and Continuity Tester

    Megger MIT310A Analogue Insulation and Continuity Tester

    inc VAT £328.80 ex VAT £274.00
    Typically ships in 5-7 working days
    The Megger MIT310A Analogue Insulation & Continuity tester tests at 250V, 500V or 1000V DC. IIdeal for testing the continuity of electrical cables.
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  17. Megger MIT230-HD Insulation and Continuity Tester

    Megger MIT230-HD Insulation and Continuity Tester

    inc VAT £330.00 ex VAT £275.00
    In Stock - Available Next Day
    This Megger Tester comes with a protective rubber boot It's compact and gives you digital readings with an analogue bargraph. 1000V insulation tester up to 1000 M ohms and automatic continuity testing at 200mA test current.
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  18. Megger MIT400/2 CAT IV Insulation Resistance Tester

    Megger MIT400/2 CAT IV Insulation Resistance Tester

    inc VAT £359.94 ex VAT £299.95
    Typically ships in 5-7 working days
    • Over voltage limit of 2%
    • 250V, 500V or 1000V insulation resistance test voltages
    • CAT IV 600V and IP54 rated
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  19. Megger MIT310 Insulation and Continuity Tester

    Megger MIT310 Insulation and Continuity Tester

    inc VAT £364.80 ex VAT £304.00
    In Stock - Available Next Day
    The Megger MIT310 Insulation and Continuity tester with 3 Year Warranty.
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  20. Fluke 1507 Insulation Resistance Tester

    Fluke 1507 Insulation Resistance Tester

    inc VAT £394.80 ex VAT £329.00
    In Stock - Available Next Day
    • Large insulation resistance measurement range of 0.01MΩ to 10GΩ
    • Test voltages of 50V, 100V, 250V, 500V and 1000V
    • Voltage measurement to 600V and earth bond resistance testing
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  21. Metrel MI3121 Smartec Insulation and Continuity Tester

    Metrel MI3121 Smartec Insulation and Continuity Tester

    inc VAT £396.00 ex VAT £330.00
    Typically ships in 2-4 working days
    The Metrel MI3121 is designed for the verification, maintenance and periodic testing of insulation resistance in electrical installations. It has selectable test voltages from 50V to 1000V and performs a continuity test with automatic polarity reversal to improve accuracy.
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  22. Megger MIT320 Insulation and Continuity Tester

    Megger MIT320 Insulation and Continuity Tester

    inc VAT £399.54 ex VAT £332.95
    Typically ships in 10-14 working days
    The Megger MIT320 is a Insulation and Continuity tester, 250, 500 & 1000V with Calibration Certificate & 3 Year Warranty.
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  23. Chauvin Arnoux CA6511 Analogue Insulation Tester

    Chauvin Arnoux CA6511 Analogue Insulation Tester

    inc VAT £412.08 ex VAT £343.40
    Typically ships in 5-7 working days
    • Measures resistance up to 1GΩ with 500V test voltage
    • Continuity testing with 200mA test current
    • Automatic voltage absence test and double insulation
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  24. Extech MG325 Insulation Multimeter

    Extech MG325 Insulation Multimeter

    inc VAT £414.00 ex VAT £345.00
    Typically ships in 7-10 working days
    • Test voltages from 0 to 1000V for measuring insulation resistance up to 200GΩ
    • Multimeter measurements for voltage, capacitance, resistance and frequency
    • Insulation testing benefits from PI/DAR, step voltage and auto discharge
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  25. Chauvin Arnoux CA6522 Insulation Tester

    Chauvin Arnoux CA6522 Insulation Tester

    inc VAT £419.22 ex VAT £349.35
    Typically ships in 5-7 working days
    • Measures industrial insulation up to 40GΩ
    • Test voltages of 250V, 500V, and 1000V
    • Adjustable timed testing for true-to-life assessment
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  26. Megger MIT410/2 CAT IV Insulation Resistance Tester

    Megger MIT410/2 CAT IV Insulation Resistance Tester

    inc VAT £442.80 ex VAT £369.00
    Typically ships in 5-7 working days
    • Over voltage limit of 2%
    • 50V, 100V, 250V, 500V or 1000V insulation resistance test voltages
    • PI and DAR tests
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  27. Megger MIT330 Insulation and Continuity Tester

    Megger MIT330 Insulation and Continuity Tester

    inc VAT £450.00 ex VAT £375.00
    In Stock - Available Next Day
    The Megger MIT330 is a downloadable Insulation and Continuity tester, 250, 500 & 1000V with Calibration Certificate & 3 Year Warranty.
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  28. Megger MIT415/2 Cat IV Insulation Tester

    Megger MIT415/2 Cat IV Insulation Tester

    inc VAT £455.94 ex VAT £379.95
    Typically ships in 5-7 working days
    • Suitable for electrical and industrial applications in a wide range of contexts
    • Insulation testing, continuity testing and True RMS voltage measurement
    • Weatherproof case to IP54 standards with over-moulded, shock-absorbing cladding
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  29. Chauvin Arnoux CA6524 Insulation Tester

    Chauvin Arnoux CA6524 Insulation Tester

    inc VAT £476.34 ex VAT £396.95
    Typically ships in 5-7 working days
    • Extremely wide insulation resistance measurement range of 0 to 200GΩ
    • Test voltages of 50V, 100V, 250V, 500V and 1000V
    • Multimeter functions such as frequency, voltage, and resistance measurement
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  30. Chauvin Arnoux CA6513 Analogue Insulation Tester

    Chauvin Arnoux CA6513 Analogue Insulation Tester

    inc VAT £485.52 ex VAT £404.60
    Typically ships in 5-7 working days
    • Resistance range of 0 to 1000MΩ via two test voltages (500V, 1000V)
    • Automatic AC voltage absence test with measurement range of 0 to 600V
    • Results shown via analogue needle on logarithmic scale
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  31. Megger MIT420/2 CAT IV Insulation Resistance Tester

    Megger MIT420/2 CAT IV Insulation Resistance Tester

    inc VAT £485.94 ex VAT £404.95
    In Stock - Available Next Day
    • Over voltage limit of 2%
    • 50V, 100V, 250V, 500V or 1000V insulation resistance test voltages
    • Variable output voltage between 10V and 1000V
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  32. Megger MIT417/2 Cat IV Insulation Tester

    Megger MIT417/2 Cat IV Insulation Tester

    inc VAT £490.80 ex VAT £409.00
    Typically ships in 5-7 working days
    • Insulation testing with maximum test voltage of 1000V
    • Continuity testing with continuous range from 0.01Ω to 1MΩ
    • Automatic inhibition of readings thanks to automatic voltage detection
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Showing 32 of 48 items

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Insulation Testers

Our analogue and digital insulation testers from Megger, Chauvin Arnoux, Martindale and Kewtech come with features including live circuit warnings, results storage and wireless data transfer.
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About Insulation Testers

With features ranging from live circuit warnings, results storage and wireless data transfer, our analogue and digital insulation testers are perfect for domestic, commercial and industrial electrical contracting. We supply Megohmmeter insulater testers from all the top manufacturers including Megger, Chauvin Arnoux, Martindale and Kewtech.

With features ranging from live circuit warnings, results storage and wireless data transfer, our analogue and digital insulation resistance testers are perfect for domestic, commercial, and industrial electrical contracting. We supply Megohmmeter insulation testers from all the top manufacturers including Megger, Metrel, Chauvin Arnoux, Martindale, Kewtech and Dilog.

Read More

Insulation resistance is calculated using an insulation resistance tester. Generally, two leads are connected into a circuit to carry out the test. How and where these two leads are connected will differ depending on what the test subject may be. A third lead, which may or may not be available for your tester (generally on testers operating at 5kV and above), will connect to a guard terminal. The guard terminal acts to allow you to be selective in evaluating specific electrical components in a large piece of plant machinery, for example.
Electrical conductors within cables, switchgear and machines are usually manufactured from copper or aluminium. Whilst both copper and aluminium boast fantastic conductive properties which make them ideal conductors, the insulating material surrounding them must the opposite to resist the current flow, keeping the flow of electrons on the correct path. These materials are known as insulators. As nearly 80% of electrical testing involves us testing insulation for integrity, it is important to understand the factors which contribute towards the degradation of insulation:

• Temperature – both hot and cold extremities of temperature will cause insulation to expand and contract causing cracks over time,
• Electrical – Specific cable types are manufactured for certain installation methods. Using an incorrect cable product may expose insulation to both over-voltage and under-voltage conditions leading to degradation,
• Physical – damage caused by blunt trauma will almost certainly have an effect on an insulator, as can vibration caused by running machinery out of phase or infrequently,
• Chemical – motor bearing oil, general plant grime and dust can have adverse chemical effects on cable insulation,
• Environment – environmental conditions will almost always influence cable insulation. PVC will react to UV rays over time, whilst fauna and flora can influence insulation resistance values.

As a result of the above, both the reliability and the safety of an electrical installation can become an unwanted issue should insulation resistance values are not tested regularly and monitored.
The test voltage will depend on what your test application, and which regulations are applicable. Please see our guide here.