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    What is the best earth ground resistance tester on the market in 2019? That’s what we will take a look at today.

    We have selected 5 top rated models covering a range of price points and functionality. Whether you’re a working professional needing a full clamp-on kit, or a home user needing basic testing features, you will find a tool to suit your needs.

    For our findings at a glance, just head to the table below. For an in depth review of each of our selected testers, keep on reading.


    Top 5 Earth Ground Resistance Testers

    NAME TESTER DETAILS OUR RATING
    Top Pick:
    Extech 382252
    Earth Ground
    Resistance
    Tester Kit
    20 to 2000 Ohm
    Acc: ±(2%rdg+2d)
    Test Frequency:
    <2.5mA/820Hz
    Best For Pros:
    Ideal Industries
    61-796 Earth
    Ground Tester
    0 - 2000Ω range
    Max Earth Volt:
    0-200V AC, 40-500Hz
    Acc: ±(1%rdg+2d)
    Amprobe GP-2A
    Earth Ground Tester
    Voltage: 0 to 460V
    Earth Resistance:
    0.08Ω to 49.9kΩ
    Resistivity:
    0.5Ωm to 314kΩm
    Best Clamp On:
    DUOYI DY1200
    Earth Resistance
    Tester Multimeter
    Jaw Size: 55*32mm,
    (1.26 ×2.17")
    Autoranging:
    0.01OΩ-1kΩ
    AC Leakage:
    10mA-30.00A/50µA
    DLG Clamp-On
    Ground Earth
    Resistance Tester
    Jaw Size: 55*32mm
    Ground Resistance:
    0.01Ω-1kΩ/0.0011ΩR
    USB DI-120

    Ground Resistance Testers Reviews

    earth ground resistance testing

    Although there are different types and brands of earth ground testers available, each can be rated based on build quality, functionality and features, as well as issues such as data transfer compatibility and convenience.

    Based on these rating criteria and more, the following 5 models are what we consider to be the best earth ground resistance testers in 2019.

    1. Top Pick: Extech 382252 Earth Ground Resistance Tester Kit

    The Extech 382252 is our top pick resistance tester because it balances price point with superior testing ability in a way that suits both professionals and home users alike.

    In fact, the product has designed to give you all the professional yet simple services in earth ground testing. It comes with a full set of hardware and customization to give you ease of use and versatility.

    Apart from ground testing, the tester can be used to measure both AC and DC voltages. For AC voltage, the maximum volts measurable is 750. DC voltage can be measured up to an impressive 1000V. This is the kind of range you need for most applications.

    The hardware that comes with the tester includes 6 AA batteries. These keep the unit charged for long periods of function. There are also two ground testers within the kit. In case one fails, which will seldom happen, you are well covered.

    Furthermore, these zinc coated ground rods ensure greater durability and help combat rust.

    The product has a resolution that can be adjusted as one wishes over 0.01/0.1/1 units. The accuracy of the tester is 2%rdg + 2dp. Frequency is less than 2.5mA/ 0.82KHz. With the set of hardware and specifications of the tester, you can test resistance in the region of 20-2000 ohms.

    The product also has LCD backlight. Thus, you can use it during nights and in dim areas. The time of the day or night is never a bother to a user of Extech 382252.

    The backlight is also critical in ensuring that you can get your signals easily, as it is fit with signals for better use and efficiency.

    Testing Specifications
    • Basic Accuracy: ±(2%rdg+2d)
    • Resolution: 0.01Ω/0.1Ω/1Ω
    • Test Current/Frequency: <2.5mA/820Hz
    • AC Earth Voltage/Frequency: 0 to 2000VAC/50 to 400Hz
    • DC Voltage: 0 to 1000V
    Pros of the Extech 382252 Earth Ground Resistance Tester Kit
    • It is designed to be easy to use
    • It offers high level of service.
    • It has a LCD backlight which makes it usable in testing dim lit areas.
    • The product is versatile and can not only measure resistance but also voltage and, High level of accuracy and resolution is offered.
    • Designed to offer reliability in risky areas such as lighting haunted areas.
    • It can freeze readings for you untill the time you do not need them anymore.
    The Cons
    • You can only measure up to 2000 ohms of resistance.

    Bottom Line

    Overall the Extech Earth Ground Resistance Tester is a great option for those that what superior features at a great price. The package comes with everything you need to get started, with the unit providing a range of testing to suit most applications. Our top pick for good reason.

    2. Professional Pick: Ideal Industries 61-796 Earth Ground Resistance Tester

    Manufactured by Ideal industries who are leading manufacturer of resistance testing products, it is clear to see how and why this unit delivers.

    As one of the more premium tools in our top 5, it is designed to offer accuracy and efficiency in measuring earth’s resistance to a degree that will suit the working professional.

    The set of hardware that come with this tester include an auxiliary two ground spikes and three lead testers.

    With these two hardware, you are assured of the ability to test soil and ground resistance with amazing efficiency and accuracy, as its high resolution offers.

    There is also a set of 8 alkaline batteries all rechargeable. This faciltates long working times without any need to recharge. Again, an important benefit for those working out in the field.

    As a precautionary and accuracy enhancing move, there is also a low battery alarm. With that, the user is notified of any drop in battery levels and he/she can change the batteries to avoid either embarrassment or inaccurate readings.

    The tester can measure ground resistance from 0-2000 Ohms at an impressive resolution of a Ohm. The accuracy is set at  0.1 Ohm.

    This is more than enough to ensure high accuracy of readings.  It can work under only 80% humidity. This however is a high humidity level and no ground is likely to surpass it.

    Furthermore, its working temperatures is between 32-104F. This too is a range that allows use in many grounds.

    Overall, this is a tester mainly used by professionals in the building and electrical industries. Any contractor needing a reliable way to test ground resistance can benefit a lot from this unit.

    Specifications
    Earth resistance ranges and resolutions 0 – 20Ω range (0.01Ω resolution); 0 – 200Ω range (0.1Ω resolution); 0 – 2000Ω range (1Ω resolution)
    Earth resistance accuracy + or – 2% reading + 2 digits or + or – 0.1Ω
    Maximum earth voltage 0-200V AC, 40-500Hz
    Earth voltage accuracy + or – 1% reading + 2 digits
    Operating humidity 80 percent
    Operating temperature 32 to 104 degrees F
    Power source (8) 1.5V AA batteries (included)
    Weight 1361g/3lbs. (including batteries)
    Dimensions 210 x 210 x 100mm (H x W x D)
    Package Includes:
    • Ideal 61-796 earth ground tester
    • TL-796 Lead set kit with (3) measuring leads: red 33m, yellow 33m, green 5m
    • (2) Auxiliary earth spikes
    • Simplified measurement probe
    • (8) 1.5V AA alkaline batteries
    • Hard case
    • Instructions
    Pros of the Ideal Industries 61-796 Earth Ground Resistance Tester
    • It has a resistance autorange feature that ensures that readings are accurate.
    • It has three test leads and additional earth spikes provided.
    • It has a data freeze feature that keeps readings untill otherwise decided.
    • 8 rechargeable batteries ensure a long time of use before recharging.
    • A low batter alarm to ensure accurate readings.
    The Cons
    • It can only work in up to 80% humidity conditions.
    • It can only work at temperatures in the region of 32-104.

    Bottom Line

    Designed for professionals by the highly reputable , this is an earth ground tester that has all the features you need for safe and reliable readings.

    The 61-796 does have a higher price point than our number one pick, however if you are using your tester on a daily basis for work, this should not be a deal breaker. Highly recommended.

    3. Amprobe GP-2A Earth Ground Tester

    This tester is designed to give you unsurpassed accuracy in testing the resistance of the earth as well as voltage. It can also be used to establish soil resistivity and noise voltage.

    You need to have proof of safety of electrical equipment once installed in the soil and this device gives you exactly that.

    Just like many other ground testers, the Amprobe GP-2A can also be used to measure voltage. Unlike the Extech 382252 however, it can only test voltage up to 460V.

    Nevertheless, its real strength is in its automated features and functionality which makes it a superb tester.  The product comes with both hardware and software.

    The hardware includes two ground testers, zinc coated resistance rods and 6 alkaline and rechargeable batteries.

    These batteries can be used for testing for up to 500 times without recharging. A great feature of the Amprobe is that it comes with a personal computer software, R-232 download to PC.

    With it, you can easily send sensitive measurements to your PC and easily generate reports for your clients.

    With the tester, you can test resistance as low as 0.08ohms to 49900 ohms. One thing about it is that it has an autoranging feature which decides the best measurement units for you.

    It also automatically takes resistance and voltage readings to ensure that you get very accurate readings.

    Resistivity is calculated to 4 decimal points and automatically applies 3 point frequency readings.  The tester comes with a LCD backlight screen that measures 7.3andndash;6.5cm.

    Thus, it can be used in dim lit areas as well as during the night.

    With its prolific features and accuracy, this tester is good for electricians or any contractor in electrical issues.

    Specifications & Features
    Ground Resistance (2 and 3-wire method) Range: 0.01 Ω – 19.99 Ω / 199.9 Ω / 1999 Ω 19.99 kΩ / 49.9 kΩ
    Ground Resistivity (4-wire) Range: 0.06 Ωm – 19.99 Ωm / 199.9 Ωm / 1999 Ωm 19.99 kΩm / 199.9 kΩm / 314 kΩm
    Voltage Measurement Range: 0 V – 460V
    Ranging Auto
    Noise Voltage Detection
    Display Backlight
    Data Storage up to 999 Readings
    PC Connection
    Auto Power Off
    Low Battery Indication
    Package Includes:
    • 2A Earth Ground Resistance Tester
    • (4) Ground stakes
    • Test lead set
    • Alligator clip set
    • USB cable
    • USB driver software
    • Carrying case
    • (6) AA batteries (installed)
    • Instructions
    Pros of the Amprobe GP-2A Earth Ground Tester
    • Autoranging feature that automatically selects the right measurement units.
    • Automatic calculation of resistance and voltage to ensure accuracy of results.
    • LCD backlight screen that makes it usable in dim areas Personal Computer software to ease generation of results.
    • The batteries it uses are not only rechargeable but also last long without need for charging.
    • It has around 1000 memory storage partitions to store readings till you no longer need them.
    The Cons
    • It is more expensive than some other testers.
    • Automation of most things may end up confusing those who do not have a knack about testing. This is because if for instance units are automatically determined, they may think of a malfunction when they manually try operate it.

    Bottom Line

    The Amprobe GP-2A Earth Ground Tester is another unit that is aimed at the professional and has all the required accuracy and features for safe and reliable readings.

    The added functionality of PC compatibility is a real highlight to this model. Again though, cost is a factor with this being one of the most expensive testers in our top 5.

    4. Best Clamp On: DUOYI DY1200 Clamp-on Ground Earth Resistance Tester Multimeter

    The DUOYI DY1200 is yet another tester that does not only give you accuracy but also a wide range to measure earth’s resistance in between.

    It comes with a number of complementary hardware to enable you test the ground and soil before installing any electrical equipment. It offers accuracy and ease of use simultaneously.

    Just as expected, it comes with ground testers to enable you make get your ground resistance measurements easily. There are also rods to ensure that your testing is done with ease and high levels of efficient.

    The DUOYI tester also comes with rubber coating. This is aimed at ensuring that it does not trigger earthly and wrongful circuit breakers specially in wet places.

    Slipping may end up giving you false measurements if not make your tester malfunction. It also ensures that the memory remains intact and functional.

    It has four installed batteries each with 1.5v. This charge is enough to make many test without the need of recharging. You can also easily get spares in case of any misfortunes.

    This tester has a 99 memory partition to store your test results. Though significantly less than that of Amprobe, you still get the option storing your results till the time you do not need them anymore.

    This feature is useful especially when readings are needed for quite some time.

    Moreover, with this tester, you get wide ground rods that can test immense resistance. The tester can measure resistance between 0.01ohms to 1000 ohms. This is quite a wide range where most readings also fall in between.

    The current measurable using this tester is between 0.01 A to 30 A. The resolution stands at an impressive 0.00005A. It also has a configure alarm value for resistance.

    Pros of the DUOYI DY1200 Clamp-on Ground Earth Resistance Tester Multimeter
    • Able to measure up to 1000 Ohms of resistance.
    • It has rubber coating to ensure that it cannot trip earth fault breakers.
    • It has a configure value alarm for resistance.
    • It has an impress resolution in measuring current which is 50000mA.
    • Wide ground rods for certainty in testing.
    The Cons
    • It lacks the automation of some reading like the Amprobe in Sometimes, it might feel too heavy than other testers.
    • The range of resistance testing is smaller than that of some other testers.
    • Voltage tests are not automated.
    • The batteries used last for fewer tests than in Amprobe and Extech 382252.

    Bottom Line

    The DUOYI DY1200 is our top pick clamp-on tester for good reason. It’s excellent price point combined with function and accessories make this an accessible unit for both professionals and home users.

    It also has a quality memory function for the recording of your readings. Well constructed with all the accessories you need within the kit box, this comes highly recommended indeed.

    5. DLG Clamp On Ground Earth Resistance Tester With USB Connection DI-120

    Another Clamp-on earth ground resistance tester makes our top 5 list. This model from DLG has wide rods to ensure good and efficient measuring of resistance. It is definitely comparable to the DUOYI DY 1200 clamp on ground tester with many of the features being in common.

    It is however a more sophisticated version. It comes with a set of hardware to facilitate the measurement of earth resistance and voltage, as well as a USB connection for easy transfer of data.

    One hardware is the set of wide rods as aforementioned. This make it one of the most reliable testers in the market.

    It aslo uses four batteries each 1.5V. These batteries can be used for a fairly long time without the need to recharge.

    A great feature about the tester is that it is able to autorange resistance readings. The range that it can be able to test is between 0.01-1000 Ohms of resistance of the ground.

    With autoranging, the best units if measurement are decided for you and the accuracy of readings thereby improved. The resolution of resistance measurement for this tester is a milliOhm.

    The tester also boasts of a software for decoding and generating reports direct into your PC. The good news is that the software is compatible with almost every operating system for PCs.

    It can run in all windows including windows 7, Vista but sadly, it cannot be used on windows 10. LCD backlight is yet another intriguing feature of this product.

    You can use it during the night or dim lit areas as well without straining to read your measurements.

    Specifications
    • Datalogging with 99 data points
    • USB Interface
    • Earth Resistance 0.01Ω-1000Ω
    • Min. Resolution 0.001Ω
    • Configurable Alarm Value of Resistance 0-199Ω
    • Conductor Size Φ2.2*1.3 inch(Φ55*32mm)
    • LCD Size 1.1*1.8 inch (28*46mm)
    • Dimension 11.2*3.5*2.4 inch(285*90*60mm)
    • Weight 1250g
    Pros of the DLG Clamp On Ground Earth Resistance Tester With USB Connection DI-120
    • It has a wide LCD backlight screen that makes it usable in all conditions and times of the day.
    • Automatic alarm for ground resistance is availed, set between the commom 0-199 Ohms.
    • It has an autoranging feature that helps in increasing accuracy of readings.
    • The batteries used last long and spares can be easily obtained.
    • It has a software to enable generation of reports and compatible with a number of Windows operating systems.
    The Cons
    • Its software cannot run on Windows 10, which is likely to be fancier for you than Windows 7.
    • It can only measure up to 1000 Ohms of ground resistance.
    • The resolution in both resistance and voltage is quite lower than of some other testers.

    Bottom Line

    Another clamp-on tester makes our top 5. Similar in shape and function to the DUOYI DY1200, this unit also has a helpful USB connection for easy data transfer to your PC.

    Worth checking out if you are working professional who will benefit from the in built software for PC compatibility.

    Ground Resistance Tester Buyer’s Guide

    As you will have seen from the reviews above, there’s a wide range of testers available.

    When looking to buy one, you do need to take into account various issues in order to purchase the right tester for your needs.

    Let’s take a look.

    1. How often do you test for soil resistivity?

    Whether you will be needing to conduct soil resistivity testing is an important factor that will determine the type of ground testing kit you buy.

    Are you a contractor that is likely to work on the design and/or installation of new grounding systems?

    If the answer is yes, a kit capable of testing soil resistivity is a must. In fact, the kit you purchase should include 4-pole testing, allowing you to obtain measurement results in ohms.

    An ohm measurement reading will give you the information you need to manually calculate soil resistivity, (normally stated in ohm/cm or ohm/m).

    You can also purchase more sophisticated tools that will calculate soil resistivity using the Wenner or the Schlumberger method.

    Essentially, if you will be carrying out 4 pole testing often enough, you should invest in a ground tester that will automatically calculate soil resistivity.

    2. What type of ground systems will you be working with?

    electricity-meter

    Another important variable that will help narrow down which ground tester you should buy is the type of ground systems you will be working on?

    Are you an electrician that mostly visits residential systems, or will you be expected to work on industrial sized, commercial systems?

    For small residential jobs, a basic 3-pole ground resistance tester (you could also use a 4-pole kit configured for 3-pole work) is the tool you need for measuring resistance of the house ground rod.

    (In situations where the house is already connected to the power line, a basic clamp-on kit will do the job).

    For larger, commercial testing you will need a 4 pole kit with longer testing leads and more sophisticated measuring features.

    3. Will you be testing the bonding of grounding systems?

    If your job involves testing the relationship of parts in a complex grounding system, the continuity of bonding between the various components will need to be measured.

    For this you will need to test conductivity using DC voltage and current.

    There are a range of testers on the market that provide this by using hundred milliamps currents.

    A unit with in built micro-ohmmeter is also useful as it gives you the ability to test at high test currents of up to 200A.

    As with all the points above, a clear understanding of how you will need to use the earth ground resistance tester, will aid you in which one to opt for.

    4. What is the most practical way for you to record the data?

    usb data recording

    The type of measurements you take, how they are recorded is another important question to ask your self.

    Some ground testers have built in memory with the ability to store up to 1000 measurements. Others have USB ports for connectivity straight to your laptop.

    Others can even be connected to wifi and or Bluetooth so that you can send results directly to your phone.

    If you need to send off results while on site, the more efficient the data transfer process the better.

    If you only need download the measurements once back in the office, speed and efficiency are not such a deal breaker.

    5. Will you be testing at sites where electromagnetic interference (EMI) might be present?

    power-poles-electricity

    If the answer is yes to the above, you should look for a testing instrument that features automatic test frequency selection.

    A tool with this capability will find the “cleanest” available frequency. This is extremely beneficial in

    You might want to consider a Clamp-on tester for these situations too. Clamp-ons are designed to test at higher frequencies.

    The model you choose might also have a test frequency selection function, offering you even greater versatility and what should amount to more reliable results.

    Further Information