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.

Find out more about Earth Loop Testers below.

TPI 85C3 Part
TPI 85C3 Part "P" Electrical Loop Tester Kit
£115.00
£138.00 inc. vat
  • Identifies polarity faults
  • Easy to Use
  • Mains powered (no batteries required)
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Socket & See PDL 234 PLUS Multifunction Loop Testing Kit
In Stock : Get It Next Working Day*
Socket & See PDL 234 PLUS Multifunction Loop Testing Kit
£154.67
£185.60 inc. vat
  • Kit comes with loop tester, fused leads, carry case and more
  • Earth loop, wiring configuration and other measurements
  • LED indicators
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Socket & See PDL PRO High-Resolution Loop Tester
Socket & See PDL PRO High-Resolution Loop Tester
£269.00
£322.80 inc. vat
  • Loop No Trip L-E, Loop High-Current L-E and High-Resolution L-E/ L-N test sequences
  • Calculate PFC and PSC
  • Cycle through and view L-N, L-E and N-E AC voltages
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Kewtech KT400DL Loop Impedance & PSC/PFC Tester
Kewtech KT400DL Loop Impedance & PSC/PFC Tester
£329.00
£394.80 inc. vat
  • High current high resolution (0.001Ω)
  • Polarity and voltage present warning LEDs
  • Lightweight, compact design with a magnetic hanger for hands free operation
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Robin Amprobe KMP7030 Earth Loop Impedance Tester
Stock Due : Estimated 2-3 Weeks
Robin Amprobe KMP7030 Earth Loop Impedance Tester
£352.20
£422.64 inc. vat
  • Easy method of evaluating loop status
  • 20, 200 and 2000Ω measurement ranges
  • CAT III 300V safety rated
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Megger LTW315 Earth Loop Tester
In Stock : Get It Next Working Day*
Megger LTW315 Earth Loop Tester
£419.00
£502.80 inc. vat
  • 2 wire non-tripping loop test
  • 50 V to 440 V operation
  • 110 V centre-tap loop testing
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Megger LTW325 Earth Loop Tester
In Stock : Get It Next Working Day*
Megger LTW325 Earth Loop Tester
£454.00
£544.80 inc. vat
  • 2 wire earth loop tester
  • Portable, lightweight design with built-in carrying case
  • Guaranteed not to trip RCDs
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Megger LT300 Earth Loop Tester
In Stock : Get It Next Working Day*
Megger LT300 Earth Loop Tester
£458.00
£549.60 inc. vat
  • Easily test high current loops
  • Supplied with fused leads and clips
  • Suitable for use on both single and 3-phase equipment
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Megger LTW335 Downloadable Earth Loop Tester
Stock Due : Estimated 1-2 Weeks
Megger LTW335 Downloadable Earth Loop Tester
£486.00
£583.20 inc. vat
  • Built-in memory
  • Two-wire system for accurate analysis of single or three phase
  • Designed not to trip RCDs
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Megger LTW425 Earth Loop Tester
In Stock : Get It Next Working Day*
Megger LTW425 Earth Loop Tester
£509.00
£610.80 inc. vat
  • 2 Wire Non-tripping loop tester
  • 50 V to 440 V operation
  • 110 V centre-tap loop testing
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Metrel MI3122 Z Line-Loop/RCD Tester
Stock Due : Estimated 1-2 Weeks
Metrel MI3122 Z Line-Loop/RCD Tester
£532.00
£638.40 inc. vat
  • Performs RCD trip time, RCD ramp current and automated RCD testing
  • Line resistance testing for 3 phase systems
  • Non-trip RCD testing
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Sonel MZC-310S High Current Loop Impedance Meter
Sonel MZC-310S High Current Loop Impedance Meter
£2,570.00
£3,084.00 inc. vat
  • AC voltage measurement in range 0…440 V
  • Frequency measurement 45.0...65.0 Hz
  • Rechargeable battery
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Sonel MZC-306 Loop Impedance Meter
In Stock : Get It Next Working Day*
Sonel MZC-306 Loop Impedance Meter
£3,550.00
£4,260.00 inc. vat
  • 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
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Sonel MZC-340-PV Fault Loop Impedance Meter
Sonel MZC-340-PV Fault Loop Impedance Meter
£4,750.00
£5,700.00 inc. vat
  • Remote control
  • Operates voltages up to 900 V AC
  • Measurement of very low short circuit loop impedances
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Megger NIM 1000 Network Impedance Meter (1000A)
Megger NIM 1000 Network Impedance Meter (1000A)
Call For Pricing
  • Impedance of phases and neutral conductors up to the 10th harmonic
  • Automatically switches between measurement points
  • 1kA test current
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Megger NIM 1000-SET Network Impedance Tester
Made To Order
Megger NIM 1000-SET Network Impedance Tester
£8,090.00
£9,708.00 inc. vat
  • Measure the grid impedance of LV grid systems
  • Multi-phase measurements with automatic test point switching
  • Memory storage and transfer to PC
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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.