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Earth Testers

Earth testers, also called earth resistance testers, are specialised electrical test and measurement tools used in electrical engineering to evaluate the integrity of grounding systems. They measure the resistance between an electrical system or device and the Earth, which is critical for ensuring safety, proper equipment functioning, and compliance with electrical regulations.

Purpose/Function of Earth Testers

The primary purpose of an earth tester is to verify that the grounding systems of electrical installations meet specified standards. These standards typically dictate the maximum allowable resistance between the grounding system and the Earth. By measuring this resistance, earth resistance testers help identify any potential issues, such as poor connections, corrosion, or inadequate grounding, which could lead to electrical hazards or equipment damage.

Popular Types of Earth Testers

There are several types of earth testers available, including:

  • Fall-of-Potential Testers – These are the most common type of earth testers and involve driving stakes into the ground to create a circuit between the earth electrode under test and a remote earth electrode. They measure the voltage drop between these two points to calculate the earth's resistance.
  • Clamp-On Testers – These testers are non-invasive and do not require driving stakes into the ground. Instead, they use a clamp to encircle the earth electrode, quickly measuring the magnetic field induced by the current flowing through the electrode. 
  • Selective Testers – Selective testers are designed to measure the resistance of individual earth electrodes within a grounding system. They allow engineers to pinpoint specific issues within complex grounding networks.

Versatile Applications of Earth Testers

Earth testers find applications in various industries and settings, including:

  • Electrical Installations
  • Telecommunications & IT
  • Construction
  • Maintenance Tasks
  • Power Generation and Distribution
  • Lightning Protection Systems.

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Chauvin Arnoux
Rohs Verified
P01126511, Chauvin Arnoux
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£ 6853.49
Megger
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1010-177, Megger
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£ 420.05
RS PRO
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203-5463, RS PRO
2 In Stock
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£ 838.31
Chauvin Arnoux
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P01299930, Chauvin Arnoux
999999997 In Stock
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£ 9188.63
RS PRO
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203-5535, RS PRO
2 In Stock
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£ 887.60
Kewtech Corporation
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KEW4105DLH, Kewtech Corporation
2 In Stock
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£ 406.95
Megger
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1000-347, Megger
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£ 1059.89
Chauvin Arnoux
P01122015, Chauvin Arnoux
2 In Stock
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£ 1224.96
Chauvin Arnoux
Rohs Verified
P01102025, Chauvin Arnoux
1 In Stock
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£ 594.08
Megger
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DET3TD, Megger
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£ 815.68
Megger
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1012-280, Megger
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£ 2491.02
Chauvin Arnoux
P01126506, Chauvin Arnoux
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£ 1509.86
FLUKE-1623-2 KIT, Fluke
3 In Stock
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£ 2980.40
Chauvin Arnoux
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P01126505, Chauvin Arnoux
1 In Stock
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£ 2207.27
Kewtech Corporation
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KEW4105A, Kewtech Corporation
4 In Stock
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£ 255.84
Chauvin Arnoux
P01122018, Chauvin Arnoux
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£ 1394.02
Chauvin Arnoux
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P01102022, Chauvin Arnoux
1 In Stock
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£ 301.35
RS PRO
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123-2339, RS PRO
16 In Stock
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£ 270.54
Chauvin Arnoux
P01127014, Chauvin Arnoux
2 In Stock
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£ 583.91
Chauvin Arnoux
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P01299918, Chauvin Arnoux
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£ 1255.48
Chauvin Arnoux
P01122016, Chauvin Arnoux
1 In Stock
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£ 1476.99
Chauvin Arnoux
P01126501, Chauvin Arnoux
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£ 889.95
FLUKE-1630-2 FC, Fluke
1 In Stock
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£ 1826.45
RS PRO
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144-5352, RS PRO
63 In Stock
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£ 207.26
Chauvin Arnoux
P01299919, Chauvin Arnoux
1 In Stock
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£ 1495.78
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New Items
New items
DET4TC2-RS, Megger

DET4TC2-RS, Megger

DET4TC 4 Pole Earth Tester 4 pole earth tester for measuring soil resistivity and resistance of earth rods and associated installations. Supplied in a hard carry case together with auxiliary stakes and cables.,An ICLAMP selective clamp is available separately, and when used with the DET4TC allows the testing of an earth rod without the need for disconnection from the system.,A VCLAMP is also available separately, which when used in conjunction with ICLAMP allows stakeless measurements to be made in situations where driving auxiliary stakes is not practical. Resistance range 0.01 to 20000 ohms auto ranging Choice of 2, 3 or 4 terminal measurements Simple one button operation Superior noise rejection to 40V pk-pk Measures earth voltage 0 – 100V Automatic P spike and C spike check Clamp input for no-disconnect testing (required ICLAMP) Clamp inputs for stakeless testing (required ICLAMP and VCLAMP) Earth current range (requires ICLAMP) Resistance range: 0.01 to 20000Ω Accuracy: 2% ± 3 digits Ingress protection: IP54 Output ±25V or ±50V at 128Hz Earth current range with ICLAMP 0.5mA to 19.9A Display: LCD with back light Operating temp: -15 → +55 °C Standards EN61010-1 CAT IV 100V Supplied with 4 earth test stakes, 4 connection leads, 8 x AA alkaline batteries, hard carry case, quick start guides, user guide on CD
New items
DET3TC EARTH TESTER         RC, Megger

DET3TC EARTH TESTER RC, Megger

DET3TC 3 Pole Earth Tester 3 pole earth tester for measuring the resistance of earth rods and associated installations.,An ICLAMP selective earth clamp is available separately, and when used with the DET3TC allows the testing of an earth rod without the need for disconnection from the system. Resistance range 0.01 to 2000 ohms auto ranging Choice of 2 or 3 terminal measurements Simple one button operation Superior noise rejection to 40V pk-pk Measures earth voltage 0 – 300V Automatic P spike & C spike check Clamp input for no-disconnect testing (requires ICLAMP) Earth current range (with ICLAMP up to 19.9A) Resistance range: 0.01 to 2000 ohms Accuracy: ±(2% rdg +3 digits) Ingress protection: IP54 Display: LCD Operating temperature -20 → +50 °C Size (HxWxD) 148 x 203 x 78mm Weight 990g Standards EN61010-1 CAT IV 150V & CAT III 300V Supplied with 2 earth test stakes, 3 connection leads, 8 x AA alkaline batteries, hard carry case, quick start guides, user guide on CD
New items
1007-331, Megger

1007-331, Megger

DET24C Earth Test Clamp DET24C is a clamp-on ground resistance tester that set new standards in terms of access, performance, features, simplicity of operation and safety. The units are designed with flat core ends to prevent dirt build-up, ensuring measurement integrity and improved reliability over products with interlocking teeth. Other enhancements include a built-in filter function for electrically noisy environments, time and date stamped stored test results and ultra-long battery life. PowerDB Lite software comes as standard with the instrument. Elliptical clamp shape improves access to earth cables and straps up to 50 mm Low maintenance flat jaw interface Measures ground resistance from 0.05 Ω to 1500 Ω Measures true RMS ground leakage current from 0.5 mA rms to 35 A rms CAT IV 600 V safety rating Backlit LCD display Bluetooth® stored test results transfer to PC Advanced memory functionality with download Megger PowerDB/PowerDB Lite™ compatible 300% increase in battery life Supplied with Carry case, carry strap (wrist loop), user guide CD-ROM, calibration check accessory, powerDB Lite software & 4 x AA alkaline batteries
New items
1000-346, Megger

1000-346, Megger

DET4TCR/2 4 Pole Earth Tester 4 pole earth tester with rechargeable batteries for measuring soil resistivity and resistance of earth rods and associated installations.,An ICLAMP selective clamp is available separately, and when used with the DET4TCR/2 allows the testing of an earth rod without the need for disconnection from the system.,A VCLAMP is also available separately, which when used in conjunction with ICLAMP allows stakeless measurements to be made in situations where driving auxiliary stakes is not practical. Resistance range 0.01 to 200k ohms auto ranging Choice of 2, 3 or 4 terminal measurements Simple one button operation Superior noise rejection to 40V pk-pk Measures earth voltage 0 – 100V Automatic P spike and C spike check Clamp input for no-disconnect testing (required ICLAMP) Clamp inputs for stakeless testing (required ICLAMP and VCLAMP) Earth current range (requires ICLAMP) Resistance range 0.01 to 200kΩ Accuracy 2% ± 3 digits Ingress protection IP54 Output ±25V or ±50V Test frequency Hz 94.105.111 Earth current range with ICLAMP 0.5mA to 19.9A Display LCD with back light Operating temp. -15 → +55 °C Standards EN61010-1 CAT IV 100V Supplied with 4 earth test stakes, 4 connection leads, 8 x AA NiMH rechargeable batteries, hard carry case, mains charger, quick start guides, user guide on CD
New items
ES165X, Fluke

ES165X, Fluke

ES165X Earth Spike Test kit For earth resistance testing on the Fluke 1653 & 1653B using the 3 wire connection method and auxiliary earth spikes. Contains Auxiliary earth probes, test connection leads and crocodile clips & carry case Test connection leads length: 20m, 10m, and 5m
New items
DT300, Catu

DT300, Catu

Catohm NG DT300 Loop Controller A device designed to easily measure earth resistance (in TT), monitor continuities and check installations (on standard 2P + T plugs or B.T. panels). On its dual-colour LCD screen, the Catohm NG clearly and instantly displays the correct plug connection, as well as the earth resistance value, whose colour changes from blue to red beyond the 100 Ω limit (max. limit value set by NF C 15-100). Standards NFC15-100, IEC 61010-1 and EN 61557-4
New items
203-5463, RS PRO

203-5463, RS PRO

RS PRO Clamp-On Ground Tester, 0.025Ω to 1500Ω, 0.3mA to 30A, UKAS Calibration Features and Benefits Clamp-on design allowing for non-contact ground resistance measurement No auxiliary electrode needed for quick and easy measurement Ground resistance measurement: 0.025Ω to 1500Ω Leakage current measurement: 0.3mA to 30A, True RMS Jaw diameter of 23mm for easy testing of grounding wires Programmable high and low alarm to easily identify errors Clear and easy to read LCD display screen Data logging of up to 116 records Compact and lightweight design Applications Telecommunication Electrical Power Plant Factory and Facility Cable TV System Cellular Phone System Gas Station & Tank Standards FAQs What batteries are required? What is included? Resistance Calibration Plate x 1 9V Battery (Installed) x 1 User Manual x 1 Carrying Box x 1 Why is grounding important?
New items
P01299930, Chauvin Arnoux

P01299930, Chauvin Arnoux

The Chauvin Arnoux CA6474 tower test kit consists of earth and resistivity tester, adapter for pylon earth measurement and earth cable. A single measurement is sufficient to acquire all the essential quantities like overall earth resistance of the line, resistance of the pylon under consideration, resistance of each pylon footing and resistance of the earth cable between pylons. Automatic calculation of the earth coupling coefficient and ground resistivity Wide measurement range for optimum resolution Rejection of interference voltages up to 60 Vpeak Ground potential measurement
New items
MW9452D, Sefram

MW9452D, Sefram

The Sefram earth measurement tester has earth voltage in between 0 to 200VAC. It has 170 x 165 x 92 mm dimension. Earth measurement with tods Earth resistance 0 to 2000 ohms Robust (dual material) case Delivered with rods and cables
New items
DT170, Catu

DT170, Catu

15-100 Control Kits Kits for performing tests required by NF C 15-100 1 DT-170 (differential controller) 1 DT-300 (earth and continuity measuring device and extension cord) 1 M-9955538 (diagnostic book 15-100) 1 DT-500* (Insulation controller and connectors) Note * DT-500 only in the PRO kit
New items
203-5535, RS PRO

203-5535, RS PRO

RS PRO Clamp-On Ground Tester, 0.025Ω to 1500Ω, 0.3mA to 30A Features and Benefits: Clamp-on design allowing for non-contact ground resistance measurement No auxiliary electrode needed for quick and easy measurement Ground resistance measurement: 0.025Ω to 1500Ω Leakage current measurement: 0.3mA to 30A, True RMS Jaw diameter of 23mm for easy testing of grounding wires Programmable high and low alarm to easily identify errors Clear and easy to read LCD display screen Data logging of up to 116 records Compact and lightweight design Applications: Telecommunication Electrical Power Plant Factory and Facility Cable TV System Cellular Phone System Gas Station & Tank Standards FAQs What batteries are required? What is included? Resistance Calibration Plate x 1 9V Battery (Installed) x 1 User Manual x 1 Carrying Box x 1 Why is grounding important?
New items
P01122015, Chauvin Arnoux

P01122015, Chauvin Arnoux

The Chauvin Arnoux C.A 6417 earth clamps, delivered in a carrying case. It is ideal for quick earth-loop resistance measurements. 600V CAT IV, they display the earth voltage with a dangerous voltage alarm and provide additional safety during measurement. Buzzer and automatic power-off
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 Earth Testers and all others.
You can email us directly at sales@enrgtech.co.uk or via our website for any queries regarding Earth Testers or any other product.
This depends on the Earth Testers individual product and information that can be found on our website.
Yes, we offer special discounts on orders above £200 for Earth 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 Earth Testers.
Yes. We keep updating our stock frequently and if a product like Earth Testers is not in stock then we will let you know.