Insulation & Continuity Testers
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£8.84 £7.37
- 1-second test cycle
- 24V DC test voltage
- PASS/ FAIL indication
7 Reward PointsPrice Match GuaranteeVER-2529067 -
£28.68 £23.90
- Easy and quick local/remote continuity verification
- Lightweight for hands-free attachment to wires
- Bright flashing LED indicators and remote test probe
23 Reward PointsPrice Match GuaranteeCT20 -
£41.40 £34.50
- Built in continuity buzzer
- Tough outside casing
- Tests for voltage and current
34 Reward PointsPrice Match GuaranteeMARTEK402 -
£48.36 £40.30
- Continuity tester with a buzzer and optical display
- Voltage proof up to 600V
- Test resistance, semi-conductors, polarity, light-bulbs, and fuses
40 Reward PointsPrice Match Guarantee3454373 -
£51.00 £42.50
- Audible and visual indicators
- Safety measure included
- Test leads and battery included in kit
42 Reward PointsPrice Match GuaranteeMARTEK404 -
£138.00 £115.00
- Simple dial and push-button interface
- Large LCD screen
- Four jacks for testing
115 Reward PointsPrice Match GuaranteeUT501A -
£166.80 £139.00
- Compact and lightweight with included protective cover
- Insulation resistance measurements up to 5.5GΩ
- Also tests polarisation index and dielectric absorption ratio
139 Reward PointsPrice Match GuaranteeMG310 -
£186.00 £155.00
- Tests for both insulation and voltage
- New Lock Power On function
- Also detects and measures continuity, resistance and AC voltage
155 Reward PointsPrice Match Guarantee380320 -
£190.80 £159.00
- Measure insulation resistance to 20.0GΩ
- Selectable test voltages to 1000V
- AC/DC voltage measurements to 600V
159 Reward PointsPrice Match GuaranteeUT505A -
£210.00 £175.00
- 0.01 MΩ - 10.00 GΩ resistance range
- Data storage
- Automatic power off
175 Reward PointsPrice Match GuaranteeCIT-10 -
£218.40 £182.00
- Conducts insulation tests and voltage detection
- Hands free operation possible with lock power on
- Super large backlit dual display
182 Reward PointsPrice Match Guarantee380260 -
£254.28 £211.90
- Detects test voltage and conducts resistances tests
- Live circuit warning system
- Measures AC/DC voltage up to 999V
211 Reward PointsPrice Match Guarantee380363 -
£261.60 £218.00
- Combined insulaition tester and digital multimeter
- Insulation resistance to 20GΩ
- AC/DC voltage, resistance and continuity functions
218 Reward PointsPrice Match GuaranteeMG320 -
Free UK DeliveryRobin Amprobe KMP7036 Insulation Tester£306.00 £255.00
- 250V, 500V and 1000V ranges
- Tests insulation of transformers, motors, cables and wires
- Optimised to preserve user and instrument safety
255 Reward PointsPrice Match Guarantee3730274 -
Free UK DeliveryUNI-T UT513A Insulation Resistance Tester£322.80 £269.00
- High spec insulation resistance tester
- Autoranging
- Bright backlit screen
269 Reward PointsPrice Match GuaranteeUT513A -
Free UK DeliverySocket & See IRC PRO Insulation and Continuity Tester£322.80 £269.00
- Conduct insulation tests at 1000V, 500V and 250V
- Buzzer function for ‘belling out’
- Hands-Free function
269 Reward PointsPrice Match GuaranteeIRCPRO -
Free UK DeliveryMegger MIT220 Insulation and Continuity Tester£352.80 £294.00
- Lightweight
- Test up to 500V
- Easy-to-use interface
294 Reward PointsPrice Match GuaranteeMEGIT8 -
Free UK DeliveryDiLog DL9050N Digital Insulation/Continuity Tester£354.00 £295.00
- A hand held tester designed to perform insulation and continuity tests
- Four test voltage ranges: 125, 200, 500, 1000V
- Measurement ranges from 0.01Ω to 4GΩ
295 Reward PointsPrice Match GuaranteeDL9050N -
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 DeliveryKewtech KT300DL Digital Insulation/ Continuity Tester£378.00 £315.00
- 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
315 Reward PointsPrice Match GuaranteeKT300 -
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 MIT310 Insulation and Continuity Tester£414.00 £345.00
- Specifically designed by electricians to deliver optimum performance
- Automatic power down functionality to preserve battery life
- Durable and robust design
345 Reward PointsPrice Match GuaranteeMEGIT2 -
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
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.