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Best Ground Resistance Tester – Reviews & Buying Guide

                        “Ensure electrical safety and performance with our expert-selected ground resistance testers.”

Ground resistance testers, also known as earth resistance testers or ground testers are crucial instruments used to ensure electrical safety by measuring the resistance of ground before installing any electronic systems. Whether you’re an electrician, an engineer, or a safety inspector, selecting the right ground resistance tester is essential to maintain safety standards and ensure optimal performance of electrical systems. Widely used across various electrical applications, from telecommunications and industrial setups to residential installations, these testers mitigate the risk of electrical hazards.

Given the plethora of options available, selecting the right ground resistance tester can be overwhelming. Here are the key considerations that help you in quick selection:

  • Measurement Range: It determines the versatility and suitability for different applications. Look for testers with a wide measurement range to accommodate various grounding systems and environments.
  • Resolution: A higher resolution allows for more precise readings, ensuring accurate assessments of ground resistance. Consider testers with high-resolution capabilities to obtain detailed and reliable results.
  • Accuracy: The accuracy of a ground resistance tester is paramount for obtaining reliable measurements. Look for testers that offer high accuracy, as this ensures the validity of the results, contributing to enhanced safety and efficiency in electrical systems.

To streamline your decision-making process, we’ve provided a comprehensive “Buying Guide” and a list of Top Ground Resistance Testers for your convenience. Go through them and select your ideal option suitable for your specific electrical requirements.

Top 5 Ground Resistance Testers Table

Best ground resistance testerMeasurement RangeResolution RangeAccuracyBuy Now
ETCR Ground Resistance Tester0.01-200Ω0.001Ω±1%±0.01ΩCheck On Amazon
Extech Ground Resistance Tester20 to 2000 Ω0.01Ω/0.1Ω/1Ω‎+/-0.5%Check On Amazon
DLG Ground Resistance Tester0.01 to 1000 Ω0.001Ω-Check On Amazon
LAKAGO Ground Resistance Tester0.01Ω-200Ω0.001Ω±1%±0.01ΩCheck On Amazon
ETCR ETCR2100+ Ground Resistance Tester0.01-1200Ω0.001Ω±1%±0.01ΩCheck On Amazon

Top 5 Ground Resistance Testers Reviews

Here are our top picks that are carefully selected to make you choose the best option confidently tailored to your specific requirements, ensuring optimal electrical safety and performance.

1. ETCR 2100A+ Ground Resistance Tester

ETCR Resistance Tester

ETCR presents the ETCR2100A+, a powerful digital clamp ground earth resistance meter designed for accurate and efficient testing. With a wide measuring range of 0.01-200Ω and a high resolution of 0.001Ω, this device ensures precise readings for various applications. Its beep-alarming feature provides quick notifications, while the data memory capability allows storage of up to 99 sets for later analysis.

One of its standout features is the self-bootup system, enabling instant use with a swift 0.5-second boot time. The device boasts a large clamp size of Φ32mm and automatic shifting for added convenience during measurements. Additionally, it includes a low battery indication for precautionary measures and features a clear LCD display for easy visibility of readings. With dual insulation, safety is prioritized, making it an ideal choice for electrical professionals and enthusiasts alike.

Best Features:

  • Wide measuring range of 0.01-200Ω
  • High resolution of 0.001Ω for precise readings
  • Beep alarming for quick notifications
  • Data memory for up to 99 sets
  • Self-bootup system for instant use
  • Large clamp size of Φ32mm
  • Automatic shifting for convenience
  • Low battery indication for precaution
  • LCD display for clear visibility
  • Dual insulation for safety


  • Long battery life with 30 hours of continuous usage
  • Supports 6VDC 4 PCS AA batteries


  • The measuring range could be expanded

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2. Extech Ground Resistance Tester

ETCR Resistance Tester

Extech offers a versatile solution with its 382252 resistance tester kit, perfect for professionals in various fields. This kit includes all necessary hardware to accurately measure earth ground in three ranges from 20 – 2000 ohms. With a large dual display featuring backlighting, visibility is enhanced in any lighting conditions. The test hold function simplifies operation, while automatic zero adjustment ensures accuracy.

It is capable of testing AC/DC voltage, resistance, and continuity, providing versatility and precision in one package. Its user-friendly design allows for quick and easy measurements, suitable for both beginners and experts. The backlit LCD ensures clear visibility of readings, even in low-light environments.

It is designed for safety and efficiency that help ensure proper grounding, essential for safeguarding electrical systems from potential hazards. Whether for residential or commercial use, this kit offers a complete solution for comprehensive testing needs.

Best Features:

  • Measures earth ground in 3 ranges from 20 to 2000 Ohm
  • Large dual display with backlight
  • Test hold function for easy operation
  • Automatic zero adjustment for accuracy
  • Tests AC/DC voltage, resistance, and continuity
  • Simplistic design for quick and easy measurements
  • Backlit LCD display for low-light conditions
  • Test Hold function for freezing data on-screen
  • Ensures proper grounding for safety
  • Complete kit for comprehensive testing


  • Includes all necessary hardware for measurements
  • Quick and easy operation


  • The resolution range could be more precise

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3. DLG Ground Resistance Tester

DLG Resistance Tester

Ranked third, the DLG DI-120 Clamp-On Tester has various advanced features that make it excel in accuracy and efficiency. With a wide resistance measurement range from 0.01Ω to 1000Ω and a resolution of 0.001Ω, this tester ensures precise readings for various applications. While its USB connectivity allows for seamless data uploading to Windows systems, it ensures precise readings and streamlined workflow.

Its user-friendly design includes a large LCD, ergonomic rubber coating, and slip-proof handling for added convenience. Autoranging capabilities, configurable alarm value, and a verification resistor enhance usability and accuracy. Portable and durable, this tester is ideal for professionals seeking reliable performance in electrical testing and maintenance.

Best Features:

  • USB connection for data uploading
  • Wide ground resistance measurement ranges from 0.01Ω to 1000Ω
  • Large LCD display for clear visualization
  • Ergonomic design with rubber coating for slip-proof handling
  • Data logging capability with 99 data points
  • Autoranging ground resistance measurements for convenience
  • Configurable alarm value for resistance
  • Includes verification resistor for accuracy confirmation
  • Complete with heavy-duty case for portability
  • Supports Windows 2000/XP/Vista/7


  • High performance and accuracy
  • Easy to use with auto-calibrate feature


  • Relatively expensive compared to other options.

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4. LAKAGO ETCR2100A+ Ground Resistance Tester

LAKAGO Resistance Tester

The LAKAGO ETCR2100A+ is a compact and precise digital clamp ground earth resistance tester designed for professional use. With a wide resistance range from 0.01Ω to 200Ω and a high resolution of 0.001Ω, it ensures accurate measurements for diverse applications. While the clamp size of Φ1.26″ (32mm) allows for versatile usage.

Notable features include the ability to measure inaccessible ground faults. While its automatic measurement frequency for convenience, dual insulation for safety, and a data memory function for storing up to 99 sets of readings.

It has an RS232 interface for easy data transfer and further analysis and reporting. Powered by 6VDC LR6 Alkaline batteries (4 PCS), it offers reliable performance in various environments, making it an efficient tool for electrical professionals.

Best Features:

  • Wide resistance range of 0.01Ω-200Ω
  • High resolution of 0.001Ω for precise measurements
  • Clamp size of Φ1.26″ (32mm) for versatile usage
  • Measures ground fault inaccessible by traditional methods
  • Automatic measurement frequency for convenience
  • Dual insulation for safety assurance
  • Data memory for storing up to 99 sets
  • RS232 interface for data transfer to computers
  • Supports 6VDC 4 PCS of LR6 Alkaline batteries
  • Compact and lightweight design for portability


  • High resistance accuracy for reliable results
  • Convenient data transfer to computers


  • Screen size could be improved for better visibility

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5. ETCR ETCR2100+ Ground Resistance Tester

ETCR ETCR2100+ Resistance Tester

The ETCR2100+ is a versatile digital clamp ground earth resistance meter designed for electrical professionals. With a wide measuring range of 0.01-1200Ω and ±1%±0.01Ω accuracy, it delivers precise readings for diverse applications. Its large clamp size of Φ32mm allows for versatile usage.

Featuring automatic shifting, dual insulation, and a data memory function for up to 99 sets of readings, it ensures seamless operation and data management. The meter’s configurable alarm threshold (1Ω to 199Ω), LCD screen, and low battery indication enhance user convenience. Compact and lightweight, it offers portability for testing in various locations. With its advanced features and reliability, the ETCR2100+ is essential for electrical testing and maintenance tasks.

Best Features:

  • Wide measuring range of 0.01-1200Ω
  • Enhanced measurement accuracy with ±1%±0.01Ω
  • Large clamp size of Φ32mm for versatile usage
  • Automatic shifting for seamless operation
  • Dual insulation for safety assurance
  • Data memory for storing up to 99 sets of readings
  • Configurable alarm threshold range of 1Ω to 199Ω
  • LCD screen for clear visibility of readings
  • Low battery indication for timely replacement
  • Compact and lightweight design for portability


  • Offers enhanced measurement accuracy
  • Convenient alarm threshold range configuration


  • Battery support could be improved.

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Buying Guide to Purchase a Ground Resistance Tester

When it comes to electrical safety, the importance of having the best ground resistance tester cannot be overstated. Buying a ground resistance tester can be daunting due to technical terms and varied recording ranges.

In this concise buying guide, we’ll explore key factors that will assist you in selecting the ideal ground resistance tester for your needs. From understanding its purpose to evaluating accuracy and durability, let’s navigate through essential considerations to make an informed decision.

1. Purpose and Application

The ground resistance tester is designed to measure the resistance of the grounding system to ensure effective grounding, which is vital for the safety of electrical installations. Consider the specific applications for which you’ll be using the tester. Different testers may have varying capabilities suitable for specific industries or environments.

2. Types of Ground Resistance Testers

Here are the three main types of ground resistance testers available:

  • Fall of Potential Testers: These are traditional testers that measure the resistance between the grounding electrode and the earth. They involve driving auxiliary electrodes into the ground and are suitable for testing large grounding systems.
  • Clamp-On Testers: These testers measure ground resistance without the need for auxiliary electrodes. They’re convenient for quick measurements and are ideal for smaller grounding systems or areas where driving auxiliary electrodes is not feasible.
  • Selective Testers: These testers allow you to isolate individual grounding electrodes within a system for precise measurements.

3. Accuracy & Precision

Accuracy is paramount in any measuring instrument. It signifies the deviation between the measured and actual resistance values. Opt for a ground resistance tester with minimal deviation and high accuracy for precise measurement results tailored to your application. Consider the resolution of the tester, which determines its ability to detect small changes in resistance.

4. Measurement Range

Ground resistance testers come with low, intermediate, and high measurement ranges. Each range serves a specific purpose, such as assessing electrode resistance or soil conditions within a grounding system. Understanding these ranges helps you select the right tool for your needs.

Ensure that the tester’s measurement range is suitable for your application. It should be able to measure both low and high resistance values accurately. Some testers offer auto-ranging capabilities, which can be convenient for quickly selecting the appropriate measurement range.

5. Display and Data Logging

Opt for a tester with a clear and easy-to-read display, especially if you’ll be working in low-light conditions. Consider testers that offer data logging capabilities if you need to record, store, and analyze measurement data over time. This can be useful for improved productivity, maintenance purposes, and compliance with safety regulations.

6. Resolution Range

The resolution range indicates the device’s precision in capturing ground resistance values. A higher resolution range offers more precise measurements, enhancing accuracy and reliability.

7. Durability and Portability

Choose a ground resistance tester that is rugged and durable, capable of withstanding harsh environmental conditions. If portability is essential for your work, look for compact and lightweight testers that are easy to carry to different job sites.

8. Safety Features

Ensure that the tester complies with relevant safety standards and regulations. Look for features such as overvoltage protection and automatic discharge of residual voltage to prevent accidents and protect both the instrument and the user.

9. Working Hours

Understanding the device’s working hours provides insight into its lifespan and reliability. Some manufacturers offer warranties based on working hours, making it essential to assess this aspect for long-term performance evaluation.

10. Ease of Use and Interface

Select a ground resistance tester with a user-friendly interface and intuitive controls to streamline the testing process. Features such as built-in help guides or on-screen prompts can be beneficial, especially for users with limited experience.

11. Calibration and Maintenance

Consider the ease of calibration and maintenance of the tester. Some models may require regular calibration to maintain accuracy. Look for testers that come with calibration certificates and offer calibration services to ensure accurate measurements.

Verdict: By considering these factors and conducting thorough research, you can select the most suitable ground resistance tester for your specific needs. Remember that safety should always be the top priority, so choose a tester that meets the highest standards of quality, accuracy, and reliability.

Ground Resistance Tester – FAQs

1. How do you test ground resistance?

* Disconnect the device from the power source
* Configure the multimeter to Ohms
* Connect the ground component with ground using a piece of wire.
* Adjust the probes on the wire and ground unit of the device to capture the readings

2. What is the difference between ground resistance tester and Megger?

Ans: The basic difference lies in their usage. Meggers are predominantly utilized by field engineers for design and soil surveys, whereas ground resistance testers focus on measuring the present resistance value of soil.

3. How does a ground resistance tester work?

Ans: Ground resistance testers operate on Ohm’s law principle, where voltage drop correlates directly with soil resistance. Electrodes are inserted into the ground to record values accurately.

4. What is the 2-point method of ground resistance?

Ans: In situations where inserting an auxiliary ground rod is impractical, the existing low-ground resistor can function as an auxiliary electrode to measure grounding resistance effectively.

5. Can we test ground resistance with a multimeter?

Ans: Yes, it’s possible to test ground resistance using a multimeter. Set the device to the Ohms setting and adjust the probes similarly to ground resistance testers on the ground rod and wire for execution.

6. Can a ground resistance tester be used for testing lightning protection systems?

Ans: Ground resistance testers are primarily designed for measuring the resistance of grounding systems. While they can provide some insight into the effectiveness of lightning protection systems, specialized equipment designed specifically for testing lightning protection systems may offer more accurate results.

7. What factors can affect the accuracy of ground resistance measurements?

Ans: Several factors can impact the accuracy of ground resistance measurements, including soil moisture content, temperature, electrode spacing, and the presence of nearby structures or utilities. It’s essential to consider these variables and take appropriate measures to minimize their influence on the measurements.

8. Are there any safety precautions to follow when using a ground resistance tester?

Ans: Yes, safety precautions should always be observed when using a ground resistance tester. These may include wearing appropriate personal protective equipment, ensuring the tester is properly calibrated and maintained, and following manufacturer guidelines for safe operation. Additionally, users should be aware of potential hazards such as electric shock and take necessary precautions to mitigate risks.

9. Can ground resistance testing be performed in all weather conditions?

Ans: While ground resistance testing can typically be conducted in various weather conditions, extreme weather such as heavy rain, lightning storms, or freezing temperatures may affect the accuracy of measurements or pose safety risks to the operator. It’s advisable to exercise caution and postpone testing if conditions are deemed unsafe.

10. What are the common applications of ground resistance testing beyond electrical installations?

Ans: Ground resistance testing is not limited to electrical installations and can be applied in various industries and settings. Common applications include telecommunications, lightning protection systems, substations, power generation facilities, and industrial machinery. Additionally, ground resistance testing is often conducted in soil studies for construction projects and environmental assessments.


Understanding soil/ground resistance is pivotal for ensuring the safety and efficiency of electrical installations. Selecting the right ground resistance tester can be challenging. However, fret not! We’ve crafted a list of top picks and a simplified buying guide outlining essential factors to ease your decision-making process.

Here are our top recommendations tailored to your needs.

  • For Budget-conscious Users: If you’re seeking affordability without compromising on essential features, the ETCR ETCR2100A+ Resistance Tester is an excellent choice. It offers reliability and functionality at a pocket-friendly price point.
  • For Premium Performance: If budget constraints are not an issue and you desire top-of-the-line performance, the DLG Resistance Tester is your go-to option. Packed with advanced features, it simplifies your work and delivers unparalleled precision.
  • The Ultimate All-Round: For a product that strikes the perfect balance between features and price, look no further than the Extech Resistance Tester. This exceptional device offers compatibility with various options while delivering outstanding performance, making it the ideal choice for users seeking versatility and value.

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