Insulation & Continuity Testers
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Free UK DeliveryChauvin Arnoux CA6511 Megohmmeter Analogue with Rubber Boot & Leads£370.80 £309.00
- Measures insulation as high as 1000Mohm
- Also tests for voltage and continuity
- Automatic testing for voltage
309 Reward PointsPrice Match GuaranteeP01140201 -
Free UK DeliveryFluke 1503 Insulation Tester£400.80 £334.00
- Insulation resistance measurements up to 20MΩ
- Voltage and earth resistance measurements
- 500V and 1000V test voltages
334 Reward PointsPrice Match GuaranteeFLUIT1 -
Free UK DeliveryMegger MIT230 Insulation and Continuity Tester£436.80 £364.00
- 250V, 500V and 1000V testing capability
- Audible buzzer notifications
- Insulation testing up to 100mOhm
364 Reward PointsPrice Match GuaranteeMEGIT9 -
Free UK DeliveryMegger MIT230 Insulation & Continuity Tester with Rubber Boot£448.80 £374.00
- Measure insulation resistance up to 1000 MΩ using 250V, 500V and 1000 V test voltages
- Measure continuity between 0.01Ω and 100Ω
- Integrated voltmeter and automatic test halting when a voltage of 50V or above is detected
374 Reward PointsPrice Match GuaranteeMIT230HD-EN -
Free UK DeliveryMegger MIT310 Insulation and Continuity Tester£453.60 £378.00
- Specifically designed by electricians to deliver optimum performance
- Automatic power down functionality to preserve battery life
- Durable and robust design
378 Reward PointsPrice Match GuaranteeMEGIT2 -
Free UK DeliveryMegger MIT300 Insulation and Continuity Tester£462.00 £385.00
- Small and portable for testing on the go
- Selectable measurements using easy-to-use dial
- Locking capability when not in use
385 Reward PointsPrice Match GuaranteeMEGIT1 -
Free UK DeliveryKewtech KT300DL Digital Insulation/ Continuity Tester£466.80 £389.00
- Ergonomic, easy-to-use, accurate, 18th Edition single-function tester
- Run insulation tests at 50V, 100V, 250V, 500V and 1000V
- Determine breakdown voltage and conduct continuity tests with an audible alert
389 Reward PointsPrice Match GuaranteeKT300 -
Free UK DeliveryBeha-Amprobe 93530-D Insulation Tester with Voltage Test£478.32 £398.60
- Insulation, voltage, and resistance measurement
- Acoustic continuity test
- Zero Point adjustment, Lock function, and integrated memory
398 Reward PointsPrice Match Guarantee3454416 -
Free UK DeliveryMegger MIT400/2 Insulation Tester£498.00 £415.00
- Measure insulation with test voltages of 250, 500 an 1000V
- Also tests continuity and voltage
- Handheld, portable design
415 Reward PointsPrice Match Guarantee1004-731 -
Free UK DeliveryChauvin Arnoux CA6522 Insulation & Continuity Tester£510.00 £425.00
- Chauvin Arnoux's entry-level insulation tester, recommended for industrial maintenance
- Selectable test voltages of 250, 500 and 1000V
- Insulation measurement range to 40GΩ
425 Reward PointsPrice Match GuaranteeP01140822 -
Free UK DeliveryFluke 1507 Insulation Tester£522.00 £435.00
- Perform repetitive tests using the 'Compare' feature
- Ships with remote test probe, test leads and alligator clips
- Battery lasts for up to 1000 high voltage tests
435 Reward PointsPrice Match GuaranteeFLUIT2 -
Free UK DeliveryChauvin Arnoux CA6513 Megohmmeter Analogue with Rubber Boot & Leads£543.36 £452.80
- Continuity and insulation tester
- Excellent display and logarithmic scale
- Resistance up to 1,000Ω
452 Reward PointsPrice Match GuaranteeP01140301 -
Free UK DeliveryChauvin Arnoux CA6524 Insulation & Continuity Tester£562.80 £469.00
- Handheld insulation and continuity tester recommended for industrial maintenance
- Upgraded version of the CA6524 with various new measurement modes
- Built-in memory
469 Reward PointsPrice Match GuaranteeP01140824 -
Free UK DeliveryMegger MIT320 Insulation and Continuity Tester£580.80 £484.00
- Powerful insulation and continuity tester in a handheld, weatherproof case
- Upgraded version of the MIT310 with more measurement functions
- Safety features keep you protected when testing in dangerous situations
484 Reward PointsPrice Match GuaranteeMEGIT4 -
Free UK DeliveryMegger MIT410/2 Insulation Tester£582.00 £485.00
- Upgraded version of Megger's MIT400/2
- Test voltages from 50 to 1000V
- Test continuity, voltage, frequency, PI and DAR
485 Reward PointsPrice Match Guarantee1004-735 -
Free UK DeliveryMegger MIT415/2 Insulation Tester£622.80 £519.00
- Insulation measurements up to 100GΩ
- Portable, handheld design with IP54 protection
- Six selectable test voltages
519 Reward PointsPrice Match Guarantee1006-738 -
Free UK DeliveryMetrel MI3121H SMARTEC® Insulation & Continuity Tester (2.5kV)£622.80 £519.00
- Ideal for conducting complete diagnostic insulation and continuity testing
- Resistance range: 100GΩ; test voltage range: 2.5kV
- Calculation of PI and DAR indexes; 200mA and 7mA continuity tests
519 Reward PointsPrice Match GuaranteeMI3121H -
Free UK DeliveryMegger MIT330 Insulation and Continuity Tester£628.80 £524.00
- Most advanced model in MIT300 series
- Selectable voltage range
- Also tests continuity, resistance and voltage
524 Reward PointsPrice Match GuaranteeMEGIT5 -
Free UK DeliveryChauvin Arnoux CA6526 Insulation & Continuity Tester£646.80 £539.00
- Test insulation resistance up to 200GΩ
- Built-in memory storage with download to PC
- Also tests a wide variety of other electrical parameters
539 Reward PointsPrice Match GuaranteeP01140826 -
Free UK DeliveryMegger MIT420/2 Insulation Tester with Memory£657.60 £548.00
- Upgraded version of the MIT410/2 with memory storage
- Variable test voltage up to 1000V
- Handheld, portable design with built-in stand
548 Reward PointsPrice Match Guarantee1004-739 -
Free UK DeliveryTeledyne FLIR IM75-2 Insulation Tester & Digital Multimeter£658.80 £549.00
- True-RMS voltage/current; earth bond resistance; continuity; diode; capacitance; insulation resistance
- LoZ mode & Advanced Variable Frequency Drive Filtering
- Durable, double-moulded casing & backlit display with large digits
549 Reward PointsPrice Match GuaranteeIM75-2 -
Free UK DeliveryApplent AT516L DC Resistance MeterCall for Pricing
- Fast response
- High quality full colour display
- Wide measurement range and high accuracy
AT516L -
Free UK DeliveryMegger MIT417/2 Insulation Tester£690.00 £575.00
- Upgraded version of the Megger MIT415/2
- Test insulation up to 200GΩ
- Selectable test voltage of up to 1000V
575 Reward PointsPrice Match Guarantee1004-738 -
Free UK DeliveryChauvin Arnoux CA6503 Megohmmeter Magneto 250 - 1000V DC£695.88 £579.90
- Average accuracy of 2.5% across four tests
- All terrain tool
- Vast number of uses
579 Reward PointsPrice Match GuaranteeP01132504
About Insulation & Continuity Testers
Insulation is a vital part of any electrical system. Correctly installed insulation ensures that the current flowing through a system remains on the designated path it should be moving through and breakdowns in the overall insulation of a system can cause leakage current to flow, leading to problems and potential hazards.
The overall insulation of any system is susceptible to degradation over some time. As standard, the insulation of an electrical system or appliance should be solid enough to constrain as much leakage current as possible until the overall level is completely negligible, but many outside factors can affect the overall insulation over some time, thus increasing the risk of higher levels of leakage current.
Parameters that can affect the overall amount of insulation present in a system vary greatly; everything from cuts in wiring, vibrations, pollution (corrosive materials), and even dust and dirt in the air can gradually erode at insulative properties, effectively rendering them less useful over time.
Insulation test equipment is designed to effectively measure the level of insulation left on an electrical system. Knowing the overall level of insulation allows the tester to determine whether the insulation is still safe for use, or whether steps have to be taken immediately to make sure that the insulation is repaired to an acceptable level.
Common insulation testers are generally used to perform two different forms of electrical measurements. These measurements are obtained by testing between the conductors that carry current when energized and other parts of the system in which no current should ever flow under normal operating conditions. To gain an overall reading of the level of insulation resistance present two things must be measured: the actual leakage current flowing through the installation, and to measure the actual resistance of the insulation.
Insulation is also commonly measured to verify quality control of manufactured electrical devices, ensure electrical devices meet codes and standards (safety compliance), determine a device's performance over time (preventive maintenance), and determine causes of failure in troubleshooting scenarios. You can further classify insulation resistance testing into different testing types. These are:
- Design testing
- Production testing
- Acceptance testing
- Verification testing
- Preventive maintenance testing
- Fault locating testing
The actual type of insulation resistance tester needed to be used also varies on an application-by-application basis. Although standard ohmmeters commonly found on devices such as multimeters can be used to measure insulation, these generally do not have the measurement range required to determine insulation effectively.
Two main instruments are used to measure insulation resistance - the first is the megohmmeter, a tester that's the same as a standard ohmmeter but has a higher measurement range to accommodate the needs of insulation. The second tester is known as a hipot tester, and these instruments measure insulation resistance by measuring leakage current. Hipot testers apply a high test voltage between two different conductors or between a conductor and ground and measure the leakage current. An excessive amount of leakage current (in apms) indicates a lower resistance or breakdown in insulation. Hipot tests almost always involve applying a test voltage that is several times higher than the specified operating voltage of the cable or device being tested.
Continuity Testing
Continuity testers are used to test for a complete flow path (open, broken, or closed) in any de-energized low-resistance application. They tie in with insulation testers, as broken continuity of a flow path generally means that current is being lost somewhere, which may be the result of a break in insulation levels.
This type of tester is often integrated into an insulation testing device, allowing users to carry out both testing types without the need to switch instruments. If you do prefer to operate with separate instruments both insulation and continuity testing devices are available as separate products as well.
Continuity testers can also contain integrated voltage measurement capability using two-pole probes.