How to Choose the Right Megohmmeter for Your Needs

Your Guide to buying the best Megohmmeter


A Megohmmeter is an essential tool for any electrical technician looking to measure insulation resistance of electrical components. In this buying guide, we will provide an overview of what a Megohmmeter is, what it is used for, and the different considerations you should take into account when purchasing a Megohmmeter. We will also provide an overview of the various Megohmmeter models available and the features each model offers. Finally, we will provide a few tips to help you make the best decision for your needs.

Key features

  1. Measuring Range: Megohmmeters come in a range of test voltages, making it important to understand the range you need for the task at hand. Some Megohmmeters support a wide voltage range, while others are limited to specific ranges.
  2. Accuracy: A Megohmmeter must be precise and accurate in its readings. Make sure to look for one that has a high accuracy rating for the voltage range you need.
  3. Display: Consider the size and type of display. For example, some Megohmmeters offer an LCD display for ease of reading, while others may require you to connect to a computer for viewing.
  4. Safety Features: When dealing with high voltages, safety is of the utmost importance. Make sure to select a Megohmmeter with built-in safety features such as circuit protection, over-voltage protection, and temperature sensors.
  5. Cost: Megohmmeters vary in price, and it is important to compare the features of each model to select one that fits your budget.

See the most popular Megohmmeter on Amazon

Important considerations


  • Voltage Range: Megohmmeters can measure voltage from a few milliamps up to several hundred volts.
  • Precision: Megohmmeters offer a high degree of accuracy and precision for measurements.
  • Durability: Megohmmeters are designed to be robust and durable, which makes them perfect for inspections in industrial settings.
  • Simplicity: Megohmmeters are relatively easy to use, and require minimal setup and calibration.
  • Safety: Megohmmeters are designed to be safe for both operators and the target device. They use low levels of current to measure resistance, so there is no risk of electrocution.


  • Cost: Megohmmeters can be quite expensive, depending on the features and capabilities.
  • Size: Megohmmeters can be bulky and difficult to transport.
  • Integration: Megohmmeters may have difficulty integrating with other test equipment.
  • Accuracy: Megohmmeters may not provide accurate readings if misused or not maintained properly.
  • Safety: Megohmmeters can be dangerous if used improperly or in a hazardous environment.

Best alternatives

  1. Insulation Resistance Tester (IR Tester) - A device used to measure electrical insulation resistance.
  2. Continuity Tester - A device used to measure resistance in a circuit and detect any faults.
  3. DC High Voltage Tester (DC HV Tester) - A device used to measure high voltages in the DC range.
  4. Dielectric Withstand Tester (DW Tester) - A device used to measure the insulation resistance of a component to an applied AC voltage.
  5. HiPot Tester - A device used to measure the ability of an insulation material to withstand high electrical pressures.

Related tools, supplies, and accessories

  • Multimeter - A device used to measure electrical properties such as resistance, voltage, and current.
  • Insulation Tester - A device used to measure the insulation resistance of an electrical system or component.
  • High Voltage Probes - Probes used to measure high voltage in electrical systems or components.
  • Connectors - Connectors such as spade terminals, banana plugs, and alligator clips used to connect the Megohmmeter to the electrical system or component being tested.
  • Test Leads - Wires with alligator clips on each end used to connect the Megohmmeter and probes to the electrical system or component being tested.
  • Test Leads Extension - Wires with alligator clips on one end used to extend the reach of the test leads.
  • Ground Connection - A grounding wire used to ground the Megohmmeter during testing for safety reasons.
  • Software - Software used to display, store, and analyze the readings of the Megohmmeter.

Common questions

  1. What is megohmmeter?
    A megohmmeter is an electronic instrument used to measure electrical insulation resistance. It is usually used to test the insulation on electrical components such as wires, cables, transformers, and circuit breakers.
  2. What is the difference between a megohmmeter and an insulation tester?
    A megohmmeter is designed for testing the insulation of high-voltage systems up to 100kV, while an insulation tester is used for testing the insulation of low-voltage systems up to 1kV.
  3. How does a megohmmeter work?
    A megohmmeter applies an electrical current to the component under test, and measures the resistance of the insulation. This resistance value is then displayed on the meter.
  4. What features should I look for when buying a megohmmeter?
    When buying a megohmmeter, it is important to consider the voltage range that the meter can measure, the accuracy of the readings, the display size, the ease of use, and the cost.
  5. What safety precautions should I follow when using a megohmmeter?
    When using a megohmmeter, it is important to follow all safety instructions as specified in the user manual. In addition, it is important to wear proper safety gear, such as insulated gloves and safety glasses, when working with high-voltage systems.


A funny fact about megohmmeters is that they have been used to test the insulation of the Mars rover. The megohmmeter is used to measure the resistance of the insulation around the rover's electrical wiring, and it is believed that it can accurately measure the insulation up to a distance of thousands of miles away. This is important for determining the safety of the rover's electrical systems when the rover is millions of miles away from Earth. Source: Electrical Database.

Disclaimer: This buying guide was not created by humans, and it is possible that some of it's content is inaccurate or incomplete. We do not guarantee or take any liability for the accuracy of this buying guide. Additionally, the images on this page were generated by AI and may not accurately represent the product that is being discussed. We have tried to convey useful information, but it is our subjective opinion and should not be taken as complete or factual.