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Loop Testers

Showing 14 Items

  1. Martindale EZ650 E-Ze Check Xtra Professional Kit

    Martindale EZ650 E-Ze Check Xtra Professional Kit

    inc VAT £106.80 ex VAT £89.00
    Due to ship February 2022
    This kit allows testing of electrical wall sockets, electrical light fittings, electrical distribution boards and terminals.
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  2. Martindale EZ2500 E-Ze Test Loop tester

    Martindale EZ2500 E-Ze Test Loop Tester

    inc VAT £142.80 ex VAT £119.00
    Due to ship April 2022
    Patented T-Safe Technology provides fast and accurate measuement without tripping 30mA, or higher, RCDs. Just plug it in and note the readings!
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  3. Socket & See PDL 234 PLUS Installer Loop Testing Kit

    Socket & See PDL 234 PLUS Installer Loop Testing Kit

    inc VAT £167.94 ex VAT £139.95
    In Stock - Available Next Day
    As used by over 8000 British Gas Engineers. 4 in 1 digital tester - loop, mains voltage, correct wiring, correct polarity for Part P testing
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  4. Socket & See DLMPRO Combined Digital Multimeter, Loop & Socket Tester

    Socket & See DLMPRO Combined Digital Multimeter, Loop & Socket Tester

    inc VAT £286.80 ex VAT £239.00
    Typically ships in 2-4 working days
    • All-in-one electrical tester for Gas and Domestic Appliance Installers
    • Combined Loop and Socket Tester with DMM Functions
    • Supplied with FREE SS130 Socket Adaptor
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  5. Socket & See PDL PRO High Resolution Loop Tester

    Socket & See PDL PRO High Resolution Loop Tester

    inc VAT £298.80 ex VAT £249.00
    In Stock - Available Next Day
    • Various tests for measuring system loop and external loop impedance
    • True impedance technique for accurate measurements
    • Hands Free operating capabilities
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  6. Kewtech KT400 Digital Loop Impedance & PSC/PFC Tester

    Kewtech KT400 Digital Loop Impedance & PSC/PFC Tester

    inc VAT £310.80 ex VAT £259.00
    In Stock - Available Next Day
    • Hands free function, in line with 18th edition regulations
    • Distribution network polarity tests & PSC/PFC measurements
    • No trip low current to high current, high resolution loop tests
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  7. Metrel MI3122 Smartec Z Line-Loop & RCD Tester

    Metrel MI3122 Smartec Z Line-Loop & RCD Tester

    inc VAT £406.80 ex VAT £339.00
    Typically ships in 2-4 working days
    The Metrel MI3122 is designed for the verification, maintenance and periodic testing of Loop & RCD's in 18th Edition electrical installations.
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  8. Megger LT300 High Current Loop Tester EN-BS

    Megger LT300 High Current Loop Tester EN-BS

    inc VAT £444.00 ex VAT £370.00
    Typically ships in 5-7 working days
    High current loop tester offering single & 3-phase testing with loop impedance measurements to 200 ohms. Supplied with BS1363 mains plug lead.
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  9. Megger LTW325 Loop Impedance Tester

    Megger LTW325 Loop Impedance Tester

    inc VAT £454.80 ex VAT £379.00
    Typically ships in 5-7 working days
    The Megger LTW325 Loop Impedance Tester allows testing on voltages up to 440V AC and is guaranteed not trip 30mA RCDs.
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  10. Megger LTW315 Loop Impedance Tester

    Megger LTW315 Loop Impedance Tester

    inc VAT £466.80 ex VAT £389.00
    In Stock - Available Next Day
    The Megger LTW315 Loop Impedance Tester allows testing on voltages up to 280V AC and is guaranteed not trip 30mA RCDs.
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  11. Megger LTW425 Loop Impedance Tester

    Megger LTW425 Loop Impedance Tester

    inc VAT £478.80 ex VAT £399.00
    In Stock - Available Next Day
    The Megger LTW425 Loop Impedance Tester offers a high current, high resolution to 0.001 ohms, tests from 50V to 440V.
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  12. Megger LRCD210 Loop and RCD Tester

    Megger LRCD210 Loop and RCD Tester

    inc VAT £492.00 ex VAT £410.00
    In Stock - Available Next Day
    The Megger LRCD210 Loop & RCD tester: with 3 year warranty & free Calibration Certificate
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  13. Megger LTW335 Loop Impedance Tester

    Megger LTW335 Loop Impedance Tester

    inc VAT £562.80 ex VAT £469.00
    In Stock - Available Next Day
    The Megger LTW335 Loop Impedance Tester that can store and download results, test voltages up to 440V AC and is guaranteed not trip 30mA RCDs.
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  14. Megger LRCD220 Loop and RCD Tester

    Megger LRCD220 Loop and RCD Tester

    inc VAT £598.80 ex VAT £499.00
    In Stock - Available Next Day
    The Megger LRCD220 Loop & RCD tester: Phase - Phase & High Current Loop Testing with Dual Operation Voltage (110V & 230V) with Calibration Certificate
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Showing 14 Items

Loop Testers

We supply loop testers from Megger, Kewtech, Metrel, Martindale and Socket & See. Loop / Ze / Zs testers are designed to check earth fault loop impedance, Prospective Fault Current PFC and Prospective Short Circuit Current PSC. Most of these earth loop impedance testers have a no trip earth loop impedance test P-E and P-N. Our loop impedance testers include 2 wire non-tripping and high current meters as well as combined loop impedance and RCD testers.
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About Loop Testers

We supply Ze and Zs loop testers and loop impedance testers from Megger, Kewtech and Socket & See designed to check prospective earth fault current and short circuit current. Our range includes 2 wire non-tripping and high current models as well as combined loop impedance and RCD testers. The earth-fault loop measurement includes the resistance of phase and protective conductors within the installation, the highest values will occur at points furthest from the incoming supply position. A measurement within the installation will give the complete earth-fault loop impedance for the point at which it is taken (Zs), or the earth-fault loop impedance external to the installation (Ze) may be measured at the supply position.

We supply loop impedance testers from Megger, Metrel, Kewtech, Martindale and Socket & See that are designed to check the impedance and prospective earth fault current and short circuit current within a protective earth system.

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The ‘earth fault loop’ refers to the overall fault path for electrical current to flow in the event of an electrical fault. In general terms, the lower the fault loop impedance, the greater the amount of current will flow in the event of an electrical fault. This may sound horrific; however, the large amount of fault current will enable a protective device to operate quickly to isolate the fault and stop the flow of current.

Measuring the earth loop impedance of an installation is important for maintaining both the efficiency of an electrical installation under prospective fault conditions, but also for reducing the risk of electrical shocks and fires taking place due to a defective means of earth. The majority of loop testers will also display a Prospective Fault Current (PFC) or Prospective Short Circuit Current (PSCC) value based upon the loop test impedance result.


It is important for a contractor to have the correct test equipment to carry out a loop impedance test to certify that an electrical installation is safe for use and not a potentially life-threatening installation.


In very simple terms, a loop tester operates on the principle of Ohm’s law. By varying the amount of resistance placed across the line and CPC conductor within an electrical installation, a fault current will naturally circulate within the loop. The instrument will then calculate an impedance value by dividing the fault current by the supply voltage.


Test-meter.co.uk offer a variety of loop testers in stock. From standard loop testers, to models that offer a low current anti-trip test, you can be sure that we can cater for your loop testing application.