The Best Megohmmeter for Your Needs

The Best Megohmmeter for Your Needs

When it comes to choosing the best megohmmeter for your needs, there are a lot of factors to consider. With many different models available on the market, it can be challenging to decide which one is right for you. In this blog post, we’ll discuss the different types of megohmmeters and help you choose the model that’s best suited for your needs. We’ll also look into the features that you should consider when making your purchase. So whether you’re finding a basic model or something more advanced, we’ve got you covered!

Megohmmeters are used to measure the electrical resistance of different insulators.

If your insulation is damaged, it can be hazardous for electricians and people nearby. A bad insulation resistance tester can cause many problems, and it’s a waste of time and money.

An insulation resistance tester is a device that provides accurate readings. It has a wide insulation test range, which means it can be used to test a variety of materials. It is also easy to use, making it perfect for anyone who needs to conduct tests.

We’ve looked at some insulation resistance testers and megohmmeters to find the best ones. Here are the six that we think are the best.

Product Name

Product Image

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Fluke 1507 Megohmmeter Insulation Tester

Fluke 1587 Insullation Tester (2 Gigaohms)

Extech 380260 Insulation Tester

AEMC Megohmmeter Insulation Resistance Tester

Top 5 Best Megohmmeter Insulation Resistance Testers

1. Fluke 1507 Megohmmeter Insulation Tester

The Fluke 1507 is one of the best insulation testers on the market. It has a lot of features, and it is also affordable. This tester can test resistances between 0.01 megaohms and ten gigaohms. It can also test voltages from 50 V to 1000 V.

This model has a large display, making it easier to see the readings. It is also backlit, making it usable in darkened areas.

The Fluke 1507 tester is a safe device to use. It has features that make it easy to use, even for beginners. If the device detects a voltage higher than 30 V, it will not let you perform the test.

This device is ideal for working with higher voltages because it has a safety rating of Cat IV. This means that the device can automatically discharge a capacitive voltage to reduce the possibility of the user being shocked.

The Fluke 1507 insulation resistance tester is known for its compact and lightweight features. It is perfect for electricians to carry with them because it doesn’t cause any fatigue.

The Fluke 1507 also has a longer battery life than other models in its price range. It should be able to conduct around 1000 insulation tests before the batteries need to be replaced. The package also includes four AA batteries.


  • Extremely accurate RMS reading
  • Resistance test range up to 10 GΩ
  • Features a remote test probe for complex testing
  • Backlit display
  • Includes safety measures


  • Tester misses alligator clips

2. Fluke 1587 Insullation Tester (2 Gigaohms)

The Fluke 1587 insulation tester costs more than the Fluke 1507. This tester has many extra features and is easy to use. The Fluke 1587 combines the functions of an insulation tester and a multimeter.

The Fluke 1587 is a great tool because it measures various things. Using it to measure temperature and insulation resistance. An insulation test mode is helpful for motors, generators, cables, and switchgear.

Insulation test voltages range from 50 V to 1000 V. The model measures from 0.01 Megohms to 2 Gigohms. This model also has CAT III safety ratings of up to 1000 V and CAT IV safety ratings of 600 V.

Detecting voltages above 30 V will prevent this Fluke model from testing. It has a large backlit display that makes reading test results easy.

Infrared digital multimeter Fluke 1587 It can read accurately linear or nonlinear loads with undistorted or distorted current or voltage waveforms.

The tester’s battery lasts longer than expected because it shuts down after 20 minutes. Fluke also included a low-battery indicator to let you know when to replace them.

The Fluke 1587 is the best tester. It also functions as a True RMS multimeter, ideal for electricians who need a complete toolkit.

The Fluke 1587 is a fantastic tool for electricians. It is ideal for frequent insulation and resistance testing. You can read our full review of the Fluke 1587 to learn more.


  • Wonderful build quality
  • Features a low-pass filter that blocks unwanted voltages when reading AC voltage and AC frequency
  • Accurate True RMS meter
  • Auto-discharge of capacitive voltage
  • Certified IP40


  • Expensive

3. Extech 380260 Insulation Tester

The Extech 380260 insulation tester is a good choice for electricians looking for a reliable, affordable option. This tester has an accurate build, readings that are easy to understand, and extra safety features. It can measure insulation resistance from 200 megohms to 2000 megohms.

The voltage range for testing begins at 250 V, 500 V and goes up to 1000 V. This model also has a large backlit display so you can see it in the dark. The dual backlit display shows the test voltage and insulation resistance.

Extech is a very accurate model that is in its price range. It usually has an accuracy level of +/- 3%. It also doesn’t have any big mistakes when it is used. Even though it is cheap, it comes with everything an electrician needs to get started. This includes 6 AA batteries, alligator clips, multimeter test leads, and a carry case.

The device can lock itself on continuous mode, meaning you don’t have to keep hold of it while it does its job. This is helpful when working alone and needing to do something else. The device will automatically discharge at the end of every test as a safety measure.

The Extech tester is made with a robust housing that protects the internal components from being damaged. It’s also one of the lightest insulation resistance testers on the market.

Overall, this is a good choice for an electrician who wants to save money. The low price means that it has a lot of features that are worth your consideration.


  • Provides accurate readings
  • Reliable device
  • Very affordable
  • Includes test leads & a hard carrying case


  • Fewer features than other models

4. AEMC Megohmmeter Insulation Resistance Tester

The AEMC megohmmeter is an excellent choice for electricians who are looking for a good, affordable tool. This model is among the lightest insulation resistance testers in its price range, weighing only 24 ounces.

You can measure your home’s insulation with three voltages: 250 V, 500 V, and 1000 V. The AEMC tester can measure between 1 kΩ and 4000 MΩ. It also includes a beeper so you can hear the results if your resistance is under 35 Ω.

The device also features overload protection rated at 600 Vrms. If you need to do extended testing, you can lock the test button for up to 15 minutes.

This insulation resistance tester is backlit and has a digital display. This makes it easier to work within dark spaces. It also has a rating of IP51, which means that it is resistant to dust and water droplets. This AEMC tester also has a longer battery lifespan than its competitors. It uses six AA batteries.

This insulation resistance tester isn’t as reliable as different models, but it is still an excellent choice if you’re looking for a cheaper option and you are a fan of AEMC products.


  • True Megohmmeter
  • Lightweight
  • Dust and water drop proof
  • Affordable


  • Low-ohm rating
  • Unreliable requires frequent restarting
  • Fragile housing

5. Megger MIT230 Insulation Tester (1000 Megaohms)

The Megger MIT230 megger is a great insulation tester. It has exceptional features that make it better than other meggers. These features include an average sensor that lets you measure linear loads without calculating the readings yourself.

The Megger tester is a compact device that is portable and easy to use. It has a set of simple controls, perfect for beginners. This tester is also safe to use and difficult to break. It is rated CAT III up to 600 V and IP40 rated.

This model has a smaller digital display screen and might be challenging to read if you are not sharp-eyed. However, the tester also includes an analog-style meter, to users of both types of insulation testers will feel comfortable using it.

This model can measure insulation resistance ranging from 0 to 1000 megohms and read voltages from 25 V to 600 V.

The Megger insulation tester is an expensive device, but it is still the best megger tester on the market. This makes it the best option for rich electricians.


  • Average-sensing meter gives accurate readings for linear loads
  • Best insulation tester available
  • CAT III rated to 600 V
  • IP40 ingress protection


  • Expensive device
  • Small screen

Top 5 Best Insulation Testers

Megohmmeters are used to measure the resistance and safety of electrical wiring insulation. If the insulation breaks down, there can be many hazards, such as electrical shock and injury, system failure, fire hazards, etc.

Insulation Testing is a recommended part of an annual or semi-annual maintenance program. Maintenance and repair times can be scheduled if insulation or wiring hazards are found. Many factors can cause insulation failure and deterioration, such as excessive heat or cold, mechanical damage, moisture, dirt, corrosive vapors, vibration, aging, and 

1. Reed Instruments Megohmmeter Insulation Resistance Tester (2000 Megohms)

The Reed megohmmeter insulation tester has a few extra features for its price. They make it easier to use. Together with the low price, these features make this product appealing to first-time buyers of insulation resistance testers.

That’s insulation resistance and test voltage on a big screen! It is versatile and light in the dark. It can test up to 2000 megohms of insulation resistance.

The resistance tester’s lock feature eliminates the need to keep your finger down. This facilitates long-term testing. The device automatically turns off when not in use to save battery power.

This low-cost resistance tester can withstand impacts. It is also CAT III safe for use up to 1000 volts.

Even with auto-shutdown, this product’s battery life is poor. It’s inefficient compared to other products we’ve discussed. The Reed R5600 is still a good budget megohmmeter option. 


  • Low cost
  • Durable construction
  • Includes a carry case and a strap.


  • Short battery life
  • Buttons are stiff

2. Supco M500 Megohmmeter Insulation Tester (1000 Megohms)

This insulation resistance tester can measure insulation resistance from 0 to 1000 megohms. You can see the result through a series of lights. It is simpler than other insulation resistance testers, which makes it more reliable because there are fewer components that can fail. This device is also more affordable than many other ones on this list.

For such a low price, you would expect this megohmmeter to be less durable and have less long-term reliability. However, we were impressed by the model’s robustness. The Supco megohmmeter is constructed to a better quality than most low-cost variants. We encountered no troubles during our testing.

This megohmmeter is lighter than the competition because it is simpler to use. It weighs only 12 ounces. The M500 also comes included with a soft carry case to be stored safely when it is not in use.

This model has some advantages, but it is not as good as the top three choices on this list. This model can only read resistance, while other models can also take voltage readings. The way the results are displayed makes it difficult to take a reading at a glance. 


  • Very cheap
  • Extremely light


  • No LCD screen makes it difficult to use
  • Only measures megohms
  • Lacks versatility

3. Klein Tools ET600 Insulation Resistance Tester

The Klein Tools ET600 Mega ohmmeter is the best insulation tester to consider if you want accuracy. This tool has a high input resistance, making it a top choice for professionals and armature working with automobiles and electronics.

Klein Tools ET600 insulation tester can measure the resistance of up to 4000MΩ. It also has a test voltage capacity between 125V and 1000V. This insulation tester is user-friendly because it has test and lock buttons which make it easy to use. Additionally, this tester features a high voltage and warning alarm.

The automatic ranging TRMs technology makes this an accurate insulator tester. You can use it anytime because it has a backlit display that you can see in the dark or at night. This tester also has a low battery signal icon that notifies you when the batteries run out. 


  • A reasonably priced insulation tester
  • User-friendly
  • Robust and robust
  • It provides precise readings.


  • When seen from certain angles, the screen may lose contrast.
  • Not optimal for more extensive uses

4. LEAGY VICTOR VC60B+ Digital Insulation Tester

This is an excellent invention that both professionals and DIY electricians have tested and found worth the price. The LEAGY VICTOR VC60B+ uses the latest technologies to provide precise and accurate results. The tester can measure insulation up to 2000 MΩ with a 1000V test voltage. The manufacturer designed it with

This model has a large LCD screen with excellent insulation reading visibility. It also has a backlight, perfect for use in dark areas or at night. Its easy-to-navigate design makes it perfect for both professionals and DIY enthusiasts.

The model has two great features: the auto shut-off and data hold features. The auto shut-off feature turns the tester off automatically after a few minutes if it is not being used. This helps conserve battery life and keeps people safe. The data hold feature allows users to take accurate readings. 


  • Has a bright and large LCD
  • Offers accurate and precise measurements
  • User-friendly
  • High insulation test range


  • Doesn’t come with a battery
  • Lacks a TRMs technology feature

5. BTMETER BT-6688B Megohmmeter Insulation Tester

If you are looking for a good insulation tester, this digital model is a good choice. It has excellent features that let it measure the resistance of up to 200GΩ. The testing voltage of this model is between 500V and 5000V.

This model is a good choice because it has a safety protection feature. It can protect you from getting hurt. The IEC 61010-1 & CATIV 600V / CATIII 1000V safety overload protection feature is important. Electricians use this model to test different things like high voltage and insulation resistance.

The package includes batteries. It also has backlight lighting and high & low power indicator. The backlight lighting enables users to see in dark areas and at night. Lastly, the data retention feature helps users take accurate measurements.

To learn more about various electrical test equipment, click here.


  • High resistance testing range
  • Comes with battery included
  • Offers accurate and precise measurement
  • Use-friendly


  • A bit expensive
  • Don’t come with extra replacement parts

Frequently Asked Questions about Best Megohmmeter

Is a Megger a megohmmeter?

The megger is a high range ohmmeter that measures insulation resistance and other high resistance values. It can also be used for ground, continuity, and short circuit testing of electrical power systems.

What is the difference between Megger and insulation tester?

An insulation tester is a tool used to measure an object’s resistance. It works similarly to a megohmmeter, but it can also do more complex tests and measurements.

What is a good insulation test reading?

The rule is that insulation resistance should be about one megohm for every 1,000 volts of operating voltage. For example, a motor rating of 2,400 volts should have a minimum insulation resistance of 2.4 megohms.

How do I test my house for insulation resistance?

To calculate the IR value, you will need to apply voltage, measure the steady-state leakage current, and divide the voltage by the current. Your test was successful if the insulation resistance reaches or exceeds the required value.

What is a megohmmeter test?

A megger is a device used to test an object’s electrical and insulation resistance. This is usually done by sending a high-voltage signal to the object. A megger is essential for avoiding electric shock and damage to equipment.

Is a megger AC or DC?

Megger Testing is the measure of insulation resistance. Megger injects DC voltages. -Select the voltages on the megger according to the rating of the equipment. -Isolate the connections.

What is led megger is used to measure?

The megger is used to measure how well something is insulated. This is often done with transformers, motors, and cables. The insulation resistance is measured by how much electricity the object can resist.

Why is megger test done?

A megger is an electrical instrument used to test insulation resistance and machine windings. This is important for safeguarding all electrical equipment from significant damage.

Can you test insulation resistance with a multimeter?

You use the insulation multimeter to check the insulation resistance of each conductor to the ground and of each conductor to the others. The insulation resistance readings are all over one gigohm, so it doesn’t seem like there is a problem with the insulation. You want to rule out the input circuitry of the drive.

What Voltage Should I Megger At?

Using a hand-operated megger test, you will need a battery to power the electronic tester. For testing equipment with voltages up to 440 volts, 500 volts DC will be sufficient. For high testing voltage electrical systems, 1000 volts to 5000 volts will be needed.