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Insulation Testers

Insulation testers, also called Megohmmeters or megger testers, are specialised test and measurement instruments designed to assess the quality and integrity of insulation in multiple electrical components. These devices can test the insulation of a wide array of equipment, including cables, generators, motors, transformers, and other electronic devices. By applying a high voltage, an insulation tester measures the resistance between conductive parts and the insulation material, ensuring that it effectively prevents current leakage. Using a megohmmeter helps identify potential faults, ensuring safety and reliability in electrical systems.

Why Buy Insulation Testers?

The fundamental function of insulation testers is to ensure electrical safety. They help prevent issues like electric shock or short circuits and help prevent costly failures or breakdowns, ensuring your systems are operating efficiently. In addition, these megger testers ensure that your installations comply with local and international electrical codes.

Check Our Range of Insulation Testers: 

Insulation testers are classified into various types, including handheld, portable models and bench-mounted testers. They include analogue and digital insulation testers with advanced models, including multifunction insulation testers and high-voltage insulation testers. Our quality lineup includes: 

  • Insulation Fault Locator: An insulation fault locator is a device designed to identify insulation faults with ease precisely.
  • Dielectric Strength Tester: Measure the dielectric breakdown strength of materials.
  • Hipot Tester: Verify the integrity of electrical insulation in high-voltage applications.
  • Insulation Resistance Tester: An insulation resistance tester gets accurate resistance readings to maintain equipment reliability.
  • Wireless Connector: This wireless connector provides convenient wireless connectivity for insulation testing.

Insulation Testers Based on Power Source:

We also carry insulation testers powered by different sources, which directly influence their portability and usability and where they can be effectively used. These include:

  • Battery-Powered Insulation Testers – These testers get power from internal batteries, typically AA or rechargeable battery packs. They are highly portable and lightweight, making them ideal for on-site testing or locations without access to an external power supply.
  • Mains-Powered Insulation Testers – These testers operate by plugging directly into an AC mains power supply. They are suitable for environments where consistent testing is required. 

Which Insulation Tester Brand Should I Choose?

Choosing the right insulation tester depends on your specific needs and budget. When selecting a brand, consider factors like accuracy, voltage range, durability, and additional features. Among the leading brands include Fluke, Megger, Omron, Facom, and Kewtich. 


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RS PRO
Rohs Verified
123-2328, RS PRO
59 In Stock
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£ 259.48
Rohs Verified
FLUKE 1550C/KIT, Fluke
1 In Stock
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£ 4933.65
Gossen Metrawatt
Rohs Verified
M550P, Gossen Metrawatt
4 In Stock
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£ 968.75
RS Pro
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123-3220, RS Pro
Pre Order
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£ 340.76
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FLUKE 1550C, Fluke
2 In Stock
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£ 4476.09
Chauvin Arnoux
Rohs Verified
P06234101, Chauvin Arnoux
3 In Stock
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£ 252.64
Schneider Electric
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IMD-IM400, Schneider Electric
1 In Stock
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£ 4016.35
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FLUKE-789/771 GEAR, Fluke
7 In Stock
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£ 1766.07
Chauvin Arnoux
P01140824, Chauvin Arnoux
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£ 597.97
RS Pro
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177-4976, RS Pro
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£ 452.20
RS PRO
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123-3386, RS PRO
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£ 390.05
RS PRO
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123-3387, RS PRO
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£ 410.51
RS PRO
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201-0446, RS PRO
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£ 1681.11
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FLUKE 1555, Fluke
2 In Stock
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£ 4933.65
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FLUKE-1535, Fluke
4 In Stock
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£ 1254.57
Robin-Amprobe
KMP7036, Robin-Amprobe
2 In Stock
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£ 361.77
Metrix
MX0406B, Metrix
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£ 547.90
DT-500, Catu
1 In Stock
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£ 450.01
RS PRO
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201-0448, RS PRO
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£ 1876.07
Chauvin Arnoux
MX0409, Chauvin Arnoux
7 In Stock
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£ 354.94
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FLUKE-1537, Fluke
3 In Stock
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£ 2007.87
RS PRO
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123-1955, RS PRO
145 In Stock
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£ 181.25
Gossen Metrawatt
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M550T, Gossen Metrawatt
7 In Stock
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£ 1328.57
Chauvin Arnoux
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P01132504, Chauvin Arnoux
1 In Stock
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£ 631.60
Chauvin Arnoux
P01140838, Chauvin Arnoux
2 In Stock
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£ 354.94
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New Items
New items
MIT220-EN, Megger

MIT220-EN, Megger

MIT220 Insulation & Continuity Tester The MIT200 is one of the smallest insulation testers available on the market today. With options of a two voltage tester to a three voltage instrument, the MIT200 instruments offer a range of safety and operation features. Insulation testing to 1000MΩ Dual & triple test voltages models Digital display with electronic analogue arc display helps to confirm insulation condition & to monitor fluctuating readings not apparent on the digital display Continuity testing at 200mA down to 0.01ohms resolution Automatic discharge of circuit under test 1mA test current at selected voltage range Default voltmeter automatically switches in when the instrument is connected to a circuit with an AC or DC voltage greater than 25V Autoranging analogue arc scale shows only the scale in use Live circuit warning above 25V, also inhibits insulation & continuity tests above 50V Lead resistance compensation on continuity Hands free continuity testing Auto power-down after 5 minutes Complies with IEC 1010-1 safety standard installation Category III, 600V phase to earth Conforms to EN61557-1 Tests to BS7671, 713-02, 713-03, 713-04, 713-06, 713-08, 413-04-04 Model MIT220 Test Voltage 250, 500V Test current on Load >1mA at minimum pass levels specified in BS7671, HD384, IEC364 & VDE0413 part 1 Insulation range 0.01MΩ to 1000MΩ on all ranges Measuring accuracy ±(3% rdg +2d) to 10MΩ, ±(5% rdg +2d) to 100MΩ Continuity Range 0.01Ω to 100.0Ω Open circuit voltage 5V± 1V Accuracy (20°C) >10Ω ±(5% rdg +2d) Zero offset adjust 0 to 9.99Ω Continuity buzzer Operates Voltage measurement range 25V to 600V @ 50/60Hz & dc Accuracy 25V to 450V ac/dc ±(1% rdg +1d) 450V to 600V ac/dc ±(2% rdg +1d) Operating temperature range -10 °C → +60 °C Battery life 3500 x 5 sec tests (typ) Dimensions / Weight 195 x 98 x 40 mm / 530g BM200 Series Replacement Guide Old BM200 M...
New items
P01138902, Chauvin Arnoux

P01138902, Chauvin Arnoux

CA 6543 Megohmmeter The C.A 6543 Megohmmeter supports extreme site conditions and is expert in qualitative insulation analysis. The CA 6543 is a 50V to 1kV high performance insulation tester. Insulation: up to 4TΩ (5 cal.) at 50 / 100 / 250 / 500 and 1000V DC Automatic calculation of insulation quality ratios: DAR and PI Programmable test period and plottingof the R(t) curve Automatic indication of voltage before and after measurement: 1 to 1000V AC / DC Resistance: 0.01Ω to 400kΩ Continuity: 0.01Ω to 40Ω (audible beep and lead compensation ) Automatic capacitance measurement after each insulation measurement: 0.005 to 4.999μF Microprocessor-controlled Memorisation of measurements (128KB) Bi-directional RS232 LCD screen with digital display and bargraph Backlit display SMOOTH function (smoothing of values displayed) Possibility of locking insulation test voltages Programmable alarms Long battery life due to rechargeable battery with built-in charger Remote control probe available (optional) Standards CEI 61010-1 + A2 - Cat III - 600 V and CEI 61557 Supplied with 1 x carrying bag, 2 x 1.5 m safety leads (red/blue), 1 x 1.5 m guarded safety lead (black), 3 x crocodile clips (red/blue/black), 1 x test probe (black), 1 x 2-sided condensed user’s manual, 1 user’s manual, 1 x 2m mains lead.
New items
RS_201-0449, RS PRO

RS_201-0449, RS PRO

RS PRO RSST-2000 Series Electrical Safety Analyser, RSST-2003 Features and Benefits: This range of RS PRO electrical safety testers provides a high-quality and high-efficiency solution to any electrical testing needs with an output capacity of 20 VA Each model has been designed with a 7-inch colour TFT LCD and consistent simplicity in its style to ensure that measurements can be interpreted quickly and easily It has also been designed with a high-efficiency PWM amplifier to exclude the influence of fluctuating voltage inputs or distorted waveforms, ensuring a stable high voltage output To comply with IEC 61010-2-034 requirements, the series uses a double insulation design for input power supply and output voltage to enhance user safety The major test functions include AC and DC withstanding voltage tests, ground bond tests and grounding continuity tests The series also gathers superb output adjustment resolution, measurement resolution, controllable voltage ramps up and ramp down time settings and upper/lower limit judgement settings In addition to this, the high illumination LED lights (flashing or permanently lit) and a high-volume audio indicator are included to provide warnings of the status during on-going tests or judgement results from the safety analyser Other functions and features of the RSST-2000 range includes 100 sets of manual test memory for the storage of different test conditions; rear output terminal for system integration; front panel remote control terminal mount/rear panel Signal I/O for users to conveniently control the analyser’s output/stop based upon the requirements All the above features of this RS PRO series facilitate a greater flexible execution of the required tests so that users can obtain accurate test and measurement results Applications: Automotive Electrical installation Industry Research Production Workshops What does the electrical tester unit come with? Quick Start Guide x 1 Power cord x 1 CD x 1 (complete user manual) Inter...
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1006-341, Megger

1006-341, Megger

Megger MIT480 mk2 Series Insulation & Continuity Testers MIT480 mk2 Series insulation & continuity testers replace the original MIT480 range. Designed for the Telecommunication and Cable testing markets. The tester features a redesigned case, back-stand and 6 cell battery compartment with separate fuse access. Features and Benefits Insulation testing up to 500 V and 100 GΩ range in a hand held instrument Three wire connection for tip, ring and earth connection Gated access to 500 V to prevent accidental damage Adjustable insulation test voltage from 10 V to 500 V New case design with optional magnetic hanging strap 600 C TRMS AC and DC voltage measurement Live circuit detection and protection Timed Testing: Automatically test to a time limit Flexible silicone test leads prevent measurement errors on GΩ ranges above 5 GΩ CAT IV 600 V IP54 Rated ABS Housing Bluetooth® and software available on MIT485/2 Supplied with Silicone test lead set, SP5 switched probe, AA Batteries x 6, hard carry case and information CD
New items
1004-745, Megger

1004-745, Megger

MIT2500 Insulation Tester MIT2500 insulation & continuity tester has been designed for the Electrical and Industrial test applications. Where operation voltages exceed 1000 V and higher insulation test voltages are needed. The tester offers both fixed range voltages of 50 V, 100 V, 250 V, 500 V, 1000 V and 2500 V. And a variable range that allows any voltage between 50 V and 2500 V to be "dialled in". MIT2500 features a redesigned case, back-stand and 6 cell battery compartment. It also offers a guard terminal to reduce surface tracking currents that reduce accuracy at higher voltages. Insulation testing up to 2.5 kV and 200 GΩ range in a hand held instrument Guard terminal for high-resistance accuracy Adjustable insulation test voltage from 50 V to 2500 V Stabilised insulation test voltage Single range, faster continuity testing from 0.01 Ω to 1 MΩ Live circuit detection and protection CAT IV 600 V applications New case design with optional magnetic hanging strap IP54 Rated ABS housing Standards IEC 61010 & EN61557 Supplied with 2.5 kV rated test leads fitted with medium size crocodile clips and 1 kV rated test leads with probes and clips
New items
1006-339, Megger

1006-339, Megger

Megger MIT 420 mk2 Series Insulation & Continuity Testers Meggers MIT420/2 Series of insulation and continuity testers are designed for testing electrical installation and specialist applications where accurate, reliable and safe testing is essential. Combining the latest range of measurement techniques with new instrument design to provide a state-of-the-art tester that is compact and comfortable to hold. Featuring a redesigned case, back-stand and 6 cell battery compartment with separate fuse access. All instruments are over-moulded for increased protection and achieve an IP54 weatherproof rating, providing an almost indestructible case. All primary results are displayed in the larger digital display and repeated on the analogue arc. Auxiliary test information such as frequency, leakage current, insulation or circuit voltage is displayed in the smaller secondary digital display. A variable range has been added to allow any intermediate voltage from 50 V to 1000 V in 10 V steps. Where application- specific test voltages are required that do not appear in the standard ranges. Continuity testing is now faster, a single auto-ranging 0.01 Ω to 1.0 MΩ function replaces the "ohms" and "k ohms" ranges. Retained are the 200 mA and 20 mA test options. Typical Applications include:- Manufacturing/production line goods, electrostatic measurement, component testing, battery powered traction and letting equipment, commercial avionics and military land, marine and air communications. Stabilised insulation test voltage 600 V TRMS AC and DC voltage measurement Live circuit detection and protection CAT IV 600 V & IP54 Weatherproof, rated to IP54 Battery Requirements: 6 AA Alkaline or Nickel Metal Hydride (NIMH) Standards EC1010 and BS EN 61557 Supplied with Hard carry case complete with red/black silicone test lead set with probes, 1 red & 1 black crocodile...
New items
MIT525, Megger

MIT525, Megger

Megger Insulation Tester The Megger MIT525 5kV lightwEight and compact insulation tester are used for diagnostics testing and maintenance of high voltage electrical equipment. It measures insulation resistance up to 10Tohm and offers tests such as polarisation index, dielectric absorption ratio, step voltage, dielectric discharge and ramp testing. This device has a lithium-ion battery and the large, clear and easy to read display makes it suitable for use in sunlight and poorly lit environments. The information displayed by it includes resistance, voltage, leakage current, capacitance, battery status and time constant. The elapsed time is also displayed constantly, which reduces the need for a separate timer. Features and Benefits PI, DAR, DD, SV and ramp test Improved productivity : Operates from line power/mains if battery is dead Li ion battery - extended capacity, rapid charge Advanced memory with time/date stamp Unique locking HV insulated plugs No detachable clips for safety with capacitance Screened options for high noise environments High-quality silicon double insulated cable Applications Industrial sites Cable testing Motor testing Automotive ESD Panel building Avionics Maintenance sites Certifications CATIV 600 V
New items
1001-939, Megger

1001-939, Megger

MIT500 Series Industrial Insulation Testers - 5 and 10kV Robust and reliable testers for high performance in the real-world. The new MIT series: MIT515, MIT525, MIT1025 are designed for industrial and power distribution applications. The New MIT 515 ( 763-9267 ) instrument can be used to perform both simple Go No-Go insulation tests and basic diagnostic insulation tests such as Polarisation Index (PI). There are two new advanced models: MIT 525 ( 763-9260 ) and MIT1025 ( 763-9264 ) with memory and diagnostic insulation testing. The 10 kV MIT1025 is suited to more rigorous testing of higher voltage equipment. The 5kV models test to 10TOhm while the 10kV models will test to 20TOhm and all instruments have a fully specified guard terminal/circuit to allow accurate results in a wide range of test situations. You can test from battery or from AC power and benefit from a long battery life and a rapid recharge time. To assist with storing and trending results, both the MIT525 and MIT1025 include memory and download to PC via USB, as well as additional diagnostic tests, such as Step Voltage (SV) and ramp test. 10 TΩ (5 kV) / 20 TΩ (10 kV) max. insulation resistance Timed IR plus PI and DAR diagnostic tests Operate with dead battery when on line power/mains Rapid charge Li-ion battery – up to 6 hrs continuous testing (5 kV) Dedicated voltmeter function (30 V to 660 V) CATIV 600 V safety rating Large LCD display with automatic backlight Noise filter – rejects up to 3 mA noise High altitude operation up to 3000 m MIT525/1025 ADDITIONAL FEATURES: Dielectric Discharge (DD), Step Voltage (SV) and ramp test functions Advanced memory with time/date stamp, on screen recall Real time clock Download of memory via isolated USB (type B) interface (USB cable to PC) PowerDB Lite asset management software Supplied with MIT515: User guide CD, power lead, 3 m leadset x 3, medium insulated clips MIT525: User guide CD, power l...
New items
FLUKE-1555 FC w/IR3000FC, Fluke

FLUKE-1555 FC w/IR3000FC, Fluke

The Fluke 1555C Tester together with the IR3000 FC connector and Fluke Connect App allow users to perform advanced insulation testing by wirelessly transfering test results from the tester to Fluke Connect which eliminates error-prone paperwork and saves your technician's time. Kit includes industrial hard case and high voltage test lead. Test voltages to up 10 kV and save time by trending on the spot only with Fluke Connect™ Warning function alerts the user that line voltage is present and gives the voltage reading up to 600 V AC or DC for increased user safety Selectable test voltages in 50 V steps from 250 V to 1000 V, and 100 V steps above 1000 V Measurements can be stored in up to 99 memory locations Long battery life gives the user over 750 tests between charges Large digital/analog LCD for easy viewing Capacitance and leakage current measurement Ramp function for breakdown testing Resistance measurements up to 2 TΩ Timer settings up to 99 minutes for timed tests
New items
123-2328, RS PRO

123-2328, RS PRO

RS Pro IIT1601 Digital Insulation and Continuity Tester RS Pro IIT1601 is a great value autoranging insulation tester. Features include a large backlit 3 digit, 4000 count LCD with analog bargraph. Features and Benefits Insulation resistance to 4000 MΩ autoranging 250 V, 500 V & 1000 V insulation test voltages Continuity to 40 Ω, 200 mA test current Low battery warning Continuity beeper Lock and hold facility Auto power off Dimensions 190 x 140 x 77 mm Weight 900 g approximately (with batteries) Standards EN61557 and BS7671 / wiring regulations, EN61010-1 600V CAT III Supplied with Test leads, AA batteries (x8), user manual RS Pro Insulation Testers
New items
FLUKE 1550C/KIT, Fluke

FLUKE 1550C/KIT, Fluke

Fluke 1550, 1555 5kV and 10kV Insulation Tester High voltage insulation tester ideal for testing high voltage equipment including switchgear, motors, generators and cables. Meets requirements of IEEE 43-2000 Capacitance and leakage current measurement Resistance measurements up to 2TΩ (Fluke 1555) Ramp function for breakdown testing Voltage breakdown detection alerts and voltage reading up to 600 V ac or dc for increased user safety 99 measurements storage and recall and PC interface Automatic calculation of Dielectric Absorption (DAR) and Polarization Index (PI) Timer settings up to 99 minutes for timed tests Guard system eliminates the effect of surface leakage current on high-resistance measurements Large LCD display with analogue bargraph Long life lead acid battery with over 750 tests between charges EN 61010 safety rating CAT IV 1000 V, CAT III 1000 V Test Voltages dc 250V, 500V, 1kV, 2.5kV, 5kV and 10kV (Fluke 1555 only) -0%, +10% at 1mA load current Resistance measurement 200kΩ → 100 GΩ: ± 5%,(Fluke 1550) 200kΩ → 200 GΩ: ± 5%,(Fluke 1555) 200GΩ → 1TΩ: ± 20% (Fluke 1550) 200GΩ → 2TΩ: ± 20% (Fluke 1555) Bargraph range 0 → 1 TΩ Leakage current measurement 1 nA to 2 mA ±(5% + 2 nA) Capacitance Measurement 0.01 μF to 15.00 μF ±(15% rdg + 0.03μF Charging Rate for capacitive load 5 seconds per μF Discharge rate for capacitive load 1.55 seconds per μF Live circuit warning 30 V → 660V ac/dc 50/60Hz ±(15% + 2 V) Power 12V Lead-acid rechargeable battery: internal mains powered charger Dimensions & Weight 269 x 277 x 160mm : 3.7kg Supplied with Test cables & crocodile clips, infrared USB adaptor, AC power cord, 12V lead acid battery (fitted), FlukeView Forms Basic Software, user manual on CD-ROM, soft carrying case (Fluke 1555 only) Fluke 1550 & 1555 kits include : IP67 hard case, NIST traceable certificate of calibration and additional ruggedized crocodil...
New items
M550P, Gossen Metrawatt

M550P, Gossen Metrawatt

METRISO TECH Insulation Tester The METRISO TECH insulation and resistance measuring instrument allows for quick and effective testing of protective measures in accordance with: DIN VDE 0100, ÖVE-EN 1 (Austria), SEV 1000 (Switzerland) and regulations specific to other countries as well. Insulation measurement per EN 61557-2 / VDE 0413 part 2 Low-resistance measurement per EN 61557-4 / VDE 0413 part 4 Voltage testing and measurement up to 1000 V Intelligent filter: precise and measurement-dependent activation for the measurement of very high resistances Digital and analog display, backlit Indication of dangerous contact voltage LED Acoustic signalling when limit value is exceeded Detection of interference voltage in switch position OFF Overvoltage protection Protects the instrument in the event of inadvertent connection to mains power Fuse link for all resistance measuring ranges Electronic fuse for the protection of low resistance and resistance measurement Rlo and R Compact and rugged for service calls under harsh conditions One measuring point self-test with test resistance of 10 MΩ per IEC/HD 60364-6 / EN 50110 Supplied with METRISO TECH insulation tester, DAkkS calibration certificate, set batteries, carrying strap, alligator clip, KS17-4 cable set, condensed operating instructions, supplement Safety Information, detailed operating instructions for download on the website www.gossenmetrawatt.com
FAQs
We offer free shipping for orders over £200 if delivery is in the UK. All other orders in the UK, shipping from £7.99 depending on the weight and measurement. Mainland Europe shipping charges start from £25. For all other countries shipping charges start from £50 for products like Insulation Testers and all others.
You can email us directly at sales@enrgtech.co.uk or via our website for any queries regarding Insulation Testers or any other product.
This depends on the Insulation Testers individual product and information that can be found on our website.
Yes, we offer special discounts on orders above £200 for Insulation Testers and all other products.
UK orders normally take between 2/3 working days. International orders normally take between 3/5 working days for all products including Insulation Testers.
Yes. We keep updating our stock frequently and if a product like Insulation Testers is not in stock then we will let you know.