Earth Testers

Verify that electrical current paths are safely earthed with our large range of earth testers. Earth spike testers, high current loop testers and handy bundle packs with earth stakes, leads and more included all available. Read More about Earth Testers
  1. UNI-T UT521 Digital Earth Resistance Tester
    UNI-T logo
    In Stock
    UNI-T UT521 Digital Earth Resistance Tester
    (no reviews)
    £177.59 £147.99
    • Datahold and data logging
    • Simple two-wire testing and precision three-wire testing
    • Range selection
    147 Reward Points
    Price Match Guarantee
    UT521
  2. Extech 382252 Earth Ground Resistance Tester Kit
    Extech logo
    Extech 382252 Earth Ground Resistance Tester Kit
    (1)
    £205.14 £170.95
    • Comes complete with test leads and two auxiliary Earth bars
    • AC/DC voltage, resistance, and continuity testing
    • Auto power off
    170 Reward Points
    Price Match Guarantee
    382252
  3. Sofamel IER4000 Digital Ground Resistance Tester
    Sofamel logo
    Free UK Delivery
    Sofamel IER4000 Digital Ground Resistance Tester
    (no reviews)
    £323.16 £269.30
    • 2-pole and 3-pole methods
    • Results recorded in memory
    • Protects user from dangerous voltages
    269 Reward Points
    Price Match Guarantee
    IER4000
  4. DiLog DL9062 Earth Resistance Tester
    DiLog logo
    Lead Time: 1-6 Days
    Free UK Delivery
    DiLog DL9062 Earth Resistance Tester
    (no reviews)
    £354.00 £295.00
    • Measure ground, low-level regular, and liquid resistance
    • Perform continuity tests and take voltage measurements
    • Earth resistance measurement range of 20Ω to 2000Ω
    295 Reward Points
    Price Match Guarantee
    DL9062
  5. Kewtech KEW4105A Digital Earth Resistance Tester
    Kewtech logo
    2 In Stock
    Free UK Delivery
    Kewtech KEW4105A Digital Earth Resistance Tester
    (no reviews)
    £358.80 £299.00
    • Three earth resistance measurement ranges - 20, 200 and 2000 Ohms
    • Housed in a protective, dust and drip proof case
    • 2 wire simplified measurement system
    299 Reward Points
    Price Match Guarantee
    KEWET1
  6. Robin Amprobe KMP7010 Earth Resistance Tester
    Robin-Amprobe logo
    Only 1 In Stock
    Free UK Delivery
    Robin Amprobe KMP7010 Earth Resistance Tester
    (no reviews)
    £417.84 £348.20
    • Earth resistance measurements across three ranges
    • Also measures voltage
    • 2 and 3 point testing
    348 Reward Points
    Price Match Guarantee
    3730256
  7. Chauvin Arnoux CA 6424 Earth & Ground Resistance Tester – 2 Pole & 3 Pole
    Chauvin Arnoux logo
    Lead Time: 1-6 Days
    Free UK Delivery
    Chauvin Arnoux CA 6424 Earth & Ground Resistance Tester – 2 Pole & 3 Pole
    (no reviews)
    £619.20 £516.00
    • Earth measurement: 0.05Ω to 50kΩ
    • Voltage: up to 600V
    • Line/ leakage current: 0.5mA to 60A
    516 Reward Points
    Price Match Guarantee
    P01127014
  8. Metrel MI3123 SMARTEC Earth Tester
    Metrel logo
    Lead Time: 1-2 Weeks
    Free UK Delivery
    Metrel MI3123 SMARTEC Earth Tester
    (no reviews)
    £698.40 £582.00
    • Simple push button interface designed for use with gloves
    • Comes with rechargeable batteries, rods and test leads
    • Ergonomic, handheld shape
    582 Reward Points
    Price Match Guarantee
    MI3123
  9. Megger DET3TD Earth Tester
    Megger logo
    3 In Stock
    Free UK Delivery
    Megger DET3TD Earth Tester
    (no reviews)
    £718.80 £599.00
    • Measures earth resistance to 2000Ω
    • 2 and 3 point testing
    • Selectable 25V or 50 V output
    599 Reward Points
    Price Match Guarantee
    MEGET8
  10. Megger DET3TC Earth Tester
    Megger logo
    2 In Stock
    Free UK Delivery
    Megger DET3TC Earth Tester
    (no reviews)
    £721.20 £601.00
    • Ground stake testing
    • Attached rod technique ability
    • Large LCD display
    601 Reward Points
    Price Match Guarantee
    MEGET9
  11. Extech GRT300 4 Wire Earth Ground Resistance Tester Kit
    Extech logo
    Free UK Delivery
    Extech GRT300 4 Wire Earth Ground Resistance Tester Kit
    (no reviews)
    £730.80 £609.00
    • Earth resistance measurements up to 2000Ω
    • 2, 3 and 4 wire testing procedures
    • Also measures AC earth voltage

    609 Reward Points
    Price Match Guarantee
    GRT300
  12. Chauvin Arnoux CA6460 Earth & Resistivity Tester
    Chauvin Arnoux logo
    Lead Time: 1-6 Days
    Free UK Delivery
    Chauvin Arnoux CA6460 Earth & Resistivity Tester
    (no reviews)
    £894.00 £745.00
    • Measurements of earth, resistivity and coupling
    • Watertight protective casing for use wherever you need it
    • Superior protection - work safely at all times
    745 Reward Points
    Price Match Guarantee
    P01126501
  13. Megger DET4TD2 Earth Tester
    Megger logo
    3 In Stock
    Free UK Delivery
    Megger DET4TD2 Earth Tester
    (no reviews)
    £1,008.00 £840.00
    • Two, three and four point testing
    • Stakeless testing
    • Failure indication
    840 Reward Points
    Price Match Guarantee
    MEGET11
  14. Chauvin Arnoux CA6462 Earth Tester - Choice of Kit
    Chauvin Arnoux logo
    Free UK Delivery
    Chauvin Arnoux CA6462 Earth Tester - Choice of Kit
    (no reviews)
    £1,146.00 £955.00
    • Rechargeable battery contains almost five hours of power
    • Measures up to 1999 Ohms of ground resistance
    • User-friendly LCD screen with backlight
    955 Reward Points
    Price Match Guarantee
    CA6462
  15. Megger DET4TR2 Rechargeable Earth Tester
    Megger logo
    Only 1 In Stock
    Free UK Delivery
    Megger DET4TR2 Rechargeable Earth Tester
    (1)
    £1,162.80 £969.00
    • 2, 3 and 4 point testing
    • Rechargeable
    • Suitable for use outdoors
    969 Reward Points
    Price Match Guarantee
    1000-324
  16. Megger DET4TC2 Earth Tester
    Megger logo
    2 In Stock
    Free UK Delivery
    Megger DET4TC2 Earth Tester
    (no reviews)
    £1,284.00 £1,070.00
    • IP54 safety ratings
    • Warning indicators prevent test failure
    • Simple one button operation
    1070 Reward Points
    Price Match Guarantee
    1000-345
  17. Megger DET4TCR2 Rechargeable Earth Tester
    Megger logo
    3 In Stock
    Free UK Delivery
    Megger DET4TCR2 Rechargeable Earth Tester
    (no reviews)
    £1,327.20 £1,106.00
    • ART (Attached Rod Technique) capability 
    • Multiple, user selectable test frequencies
    • Includes leads, stakes, calibration certificate and rugged carry case
    1106 Reward Points
    Price Match Guarantee
    1000-346
  18. Sofamel CRT-1200 Clamp Earth Resistance Tester - Optical & Acoustic
    Sofamel logo
    Free UK Delivery
    Sofamel CRT-1200 Clamp Earth Resistance Tester - Optical & Acoustic
    (no reviews)
    £1,331.76 £1,109.80
    • 3700 V test voltage
    • 6.5 mm electric clearance
    • Automatic range
    1109 Reward Points
    Price Match Guarantee
    CRT-1200
  19. Fluke 1623-2 GEO Earth Ground Tester
    Fluke logo
    Only 1 In Stock
    Free UK Delivery
    Fluke 1623-2 GEO Earth Ground Tester
    (no reviews)
    £1,498.80 £1,249.00
    • Four measuring methods
    • Suitable for use indoors and outdoors
    • High accuracy
    1249 Reward Points
    Price Match Guarantee
    FLUEGT1
  20. Chauvin Arnoux CA6470N Earth & Resistivity Tester
    Chauvin Arnoux logo
    Lead Time: 1-2 Weeks
    Free UK Delivery
    Chauvin Arnoux CA6470N Earth & Resistivity Tester
    (no reviews)
    £1,554.00 £1,295.00
    • Rechargeable battery can be charged through the mains or in a car
    • Measures earth resistance, frequency, resistivity and coupling
    • USB port to send data to your computer
    1295 Reward Points
    Price Match Guarantee
    P01126506
  21. Catu MX-430-M Earth Tester
    CATU logo
    Free UK Delivery
    Catu MX-430-M Earth Tester
    (no reviews)
    £2,172.24 £1,810.20
    • Measure earth resistance, resistivity and detect parasitic voltages
    • Built inside its own carrying case
    • Four measurement ranges
    1810 Reward Points
    Price Match Guarantee
    MX-430-M
  22. Megger DET4TC2 Earth Tester + Clamps
    Megger logo
    Lead Time: 1-2 Weeks
    Free UK Delivery
    Megger DET4TC2 Earth Tester + Clamps
    (no reviews)
    £2,178.00 £1,815.00
    • Free calibration certificate with your device, as well as leads, stakes and a hard wearing carry case 
    • ICLAMP and VCLAMP provided
    • ART and stakeless testing possible
    1815 Reward Points
    Price Match Guarantee
    1000-365
  23. Megger DET4TCR2 Earth Tester + Clamps
    Megger logo
    Only 1 In Stock
    Free UK Delivery
    Megger DET4TCR2 Earth Tester + Clamps
    (no reviews)
    £2,310.00 £1,925.00
    • Includes DET4TCR2 + Clamps
    • Perform ART and true stakeless testing
    • Wide testing range
    1925 Reward Points
    Price Match Guarantee
    1000-366
  24. Fluke 1625-2 GEO Earth Ground Tester
    Fluke logo
    4 In Stock
    Free UK Delivery
    Fluke 1625-2 GEO Earth Ground Tester
    (no reviews)
    £2,348.40 £1,957.00
    • Four measuring methods included
    • Features new Stakeless Testing
    • Advanced functions included
    1957 Reward Points
    Price Match Guarantee
    FLUKE 1625

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About Earth Testers

Grounding is an essential part of an electrical installation or system. Proper grounding ensures that the electrical system is safe for use at all times and that electricity flows to earth, rather than through a nearby conductor such as a human.

Grounding systems are different from conventional installations - whereas a standard electrical installation will have a ground wire built in to direct the flow of current, grounding systems only have current flow when there is a problem. Grounding systems create a path for current to flow, but during a problem, current can range from a couple of mA of unwanted static charge to induced voltages or fault currents of several thousand amps. Current flowing to the ground through a grounding system is not constrained to follow any given path to earth as the current would in a normal circuit.

Since this is the case, specialist earth testing equipment is required to ensure that earth grounding systems have overall resistance up to a maximum of 25Ω, which is the standard defined to ensure the overall safety of grounding installation. Although this is the overall standard of resistance, several devices experience problems with ground resistance of this level, and specialist earth equipment can be used with sensitive electronic equipment to carry out proper earth grounding as necessary.

Earth testing equipment allows different kinds of earth grounding to be installed correctly. No matter whether you're carrying out earth grounding in buildings, on equipment, or electronics, there's a piece of equipment in store that can do that.

Proper grounding requires extensive testing procedures before, during, and after the installation of the grounding. Earth testers and other earth testing equipment are used regularly in this field to carry out testing procedures on grounding, allowing users to test such things as voltage measurements (system voltage and static electricity voltages), current measurements (system currents and leakage currents) and resistance measurements (ground system resistance, soil resistance, and soil PH measurements).

Earth Tester Types

There are many different types of earth testers, suitable for a wide array of different earthing applications. There are clamp-on ammeters, clamp-on leakage current meters, electrostatic locator meters, multimeters, three-terminal ground resistance meters, four-terminal ground resistance meters, and soil pH meters. There's also a selection of accessories available for these different products that expand the overall capabilities of the tester. Example accessories used with earth testers included earth spikes, cable reels, and attachable optional clamps.

The following equipment types are suitable for the following grounding applications:

Test or Measurement Test Instrument
Measuring circuit, system, or ground voltages Standard voltmeter
Measuring circuit or system current Standard clamp-on ammeter
Measuring ground leakage current Clamp-on leakage current meter
Measuring static electrical charges Electrostatic discharge meter

Measuring earth ground system (ground rod/grid, ground connections

etc.) resistance without connecting the earth's ground to the building grounding system

Clamp-on ground resistance meter

Measuring earth ground system (ground rod/grid, ground connections

etc.) resistance before connecting the earth's ground to the building grounding system
3-terminal ground resistance meter
Measuring the earth's resistance (resistivity) 4-terminal ground resistance meter
Measuring soil pH pH meter