Earth Loop Testers

Loop impedance testers, or loop testers, verify the loop impedance of a live electrical circuit without disconnecting from the electrical supply. Most testers include non-tripping RCD technology as standard to prevent unexpected outages. Read More about Earth Loop Testers
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13 Products
  1. Kewtech KT400DL Loop Impedance & PSC/PFC Tester
    Kewtech logo
    Lead Time: 1-6 Days
    Free UK Delivery
    Kewtech KT400DL Loop Impedance & PSC/PFC Tester
    (no reviews)
    £394.80 £329.00
    • High current high resolution (0.001Ω)
    • Polarity and voltage present warning LEDs
    • Lightweight, compact design with a magnetic hanger for hands free operation
    329 Reward Points
    Price Match Guarantee
    KT400DL
  2. Robin Amprobe KMP7030 Earth Loop Impedance Tester
    Robin-Amprobe logo
    Free UK Delivery
    Robin Amprobe KMP7030 Earth Loop Impedance Tester
    (no reviews)
    £422.64 £352.20
    • Easy method of evaluating loop status
    • 20, 200 and 2000Ω measurement ranges
    • CAT III 300V safety rated
    352 Reward Points
    Price Match Guarantee
    3842833
  3. Megger LTW315 Earth Loop Tester
    Megger logo
    3 In Stock
    Free UK Delivery
    Megger LTW315 Earth Loop Tester
    (1)
    £502.80 £419.00
    • 2 wire non-tripping loop test
    • 50 V to 440 V operation
    • 110 V centre-tap loop testing
    419 Reward Points
    Price Match Guarantee
    MEGLTW315
  4. Megger LTW325 Earth Loop Tester
    Megger logo
    3 In Stock
    Free UK Delivery
    Megger LTW325 Earth Loop Tester
    (no reviews)
    £544.80 £454.00
    • 2 wire earth loop tester
    • Portable, lightweight design with built-in carrying case
    • Guaranteed not to trip RCDs
    454 Reward Points
    Price Match Guarantee
    MEGLTW325
  5. Megger LT300 Earth Loop Tester
    Megger logo
    1 Option in Stock
    Free UK Delivery
    Megger LT300 Earth Loop Tester
    (no reviews)
    £550.80 £459.00
    • Easily test high current loops
    • Supplied with fused leads and clips
    • Suitable for use on both single and 3-phase equipment
    459 Reward Points
    Price Match Guarantee
    LT300-EN-FS-BS-00
  6. Megger LTW335 Downloadable Earth Loop Tester
    Megger logo
    Lead Time: 2-3 Weeks
    Free UK Delivery
    Megger LTW335 Downloadable Earth Loop Tester
    (no reviews)
    £570.00 £475.00
    • Built-in memory
    • Two-wire system for accurate analysis of single or three phase
    • Designed not to trip RCDs
    475 Reward Points
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    MEGLTW335
  7. Megger LTW425 Earth Loop Tester
    Megger logo
    4 In Stock
    Free UK Delivery
    Megger LTW425 Earth Loop Tester
    (no reviews)
    £610.80 £509.00
    • 2 Wire Non-tripping loop tester
    • 50 V to 440 V operation
    • 110 V centre-tap loop testing
    509 Reward Points
    Price Match Guarantee
    MEGLTW425
  8. Metrel MI3122 Z Line-Loop/RCD Tester
    Metrel logo
    Lead Time: 1-2 Weeks
    Free UK Delivery
    Metrel MI3122 Z Line-Loop/RCD Tester
    (no reviews)
    £638.40 £532.00
    • Performs RCD trip time, RCD ramp current and automated RCD testing
    • Line resistance testing for 3 phase systems
    • Non-trip RCD testing
    532 Reward Points
    Price Match Guarantee
    MI3122
  9. Sonel MZC-310S High Current Loop Impedance Meter
    Sonel logo
    Free UK Delivery
    Sonel MZC-310S High Current Loop Impedance Meter
    (no reviews)
    £3,084.00 £2,570.00
    • AC voltage measurement in range 0…440 V
    • Frequency measurement 45.0...65.0 Hz
    • Rechargeable battery
    2570 Reward Points
    Price Match Guarantee
    MZC-310S
  10. Sonel MZC-306 Loop Impedance Meter
    Sonel logo
    Made To Order
    Free UK Delivery
    Sonel MZC-306 Loop Impedance Meter
    (no reviews)
    £4,020.00 £3,350.00
    • Wide operating voltage range ensures suitability for measuring an array of networks
    • Measure fault loop impedance to a resolution of 0.01Ω
    • Save up to 990 readings which can be download via a USB interface
    3350 Reward Points
    Price Match Guarantee
    MZC-306
  11. Sonel MZC-340-PV Fault Loop Impedance Meter
    Sonel logo
    Free UK Delivery
    Sonel MZC-340-PV Fault Loop Impedance Meter
    (no reviews)
    £5,580.00 £4,650.00
    • Remote control
    • Operates voltages up to 900 V AC
    • Measurement of very low short circuit loop impedances
    4650 Reward Points
    Price Match Guarantee
    MZC-340-PV
  12. Megger NIM 1000 Network Impedance Meter (1000A)
    Megger logo
    Free UK Delivery
    Megger NIM 1000 Network Impedance Meter (1000A)
    (no reviews)
    Call for Pricing
    • Impedance of phases & neutral conductors up to the 10th harmonic
    • Automatically switches between measurement points
    • 1kA test current
    We require additional information before you purchase this product.
    128312147
  13. Megger NIM 1000-SET Network Impedance Tester
    Megger logo
    Made To Order
    Free UK Delivery
    Megger NIM 1000-SET Network Impedance Tester
    (no reviews)
    £9,708.00 £8,090.00
    • Measure the grid impedance of LV grid systems
    • Multi-phase measurements with automatic test point switching
    • Memory storage and transfer to PC
    8090 Reward Points
    Price Match Guarantee
    1003373

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About Earth Loop Testers

Measuring the earth loop is vital for maintaining both the efficiency of electrical systems and for reducing the risk of electrical fires/shocks taking place due to a short circuit caused by incorrect earthing of a system.

Without regular loop testing, the overall integrity of an electrical system could be compromised. Electricians need to have the tools necessary to carry out earth fault loop impedance testing, as an incorrectly installed loop could be the difference between a safe system and a dangerous one. Earth loop testers are designed to find the exact path of earth loop impedance through a system, allowing users to determine whether the path taken by the impedance is sufficient enough to trip a protective measure installed upon that electrical system before problems arise.

The basic rule for earth loop testers is that the lower the loop impedance, the greater the overall fault current is, and the more quickly the circuit is disconnected during a fault. It is therefore important that users utilise earth loop testers to determine the fault current value and the overall path of the loop, ensuring that the protective measure trips out the circuit quickly and efficiently.

Tester.co.uk offers a wide range of earth loop testers, including Chauvin Arnoux loop testing equipment, Kewtech earth testers, Martindale loop testers, Megger earth loop testers, Metrel earth loop testers, and Socket and See digital loop testers. Our products comply with the latest 18th-edition rules and regulations and come from some of the world's top suppliers of earth loop testers.