What Multimeter Should I Buy?

Selecting the right multimeter for your electrical testing needs can be a daunting task, given the vast array of options available in the market. Multimeters are, perhaps, the most important tools used by electricians to measure voltage, current, resistance, and other electrical values. There are many brands, offering tons of different styles, each with slight variations in features – so deciding what to buy can be overwhelming.

One thing to keep in mind is the price-point vs it’s features. We’ve selected a few options within each class which vary in price. Typically the more features a tester has, the more it will cost. You do not need every feature in the world in your tester if you just do residential wiring, however if you’re an industrial technician – you might. So check out each of these meters as they’re extremely common in the electrical trade and have been time tested and trusted by reputable brands like Fluke, Ideal, Klein, and Greenlee; brands known for their quality and performance.

Digital Multimeters (DMMs)

Digital Multimeters, often referred to as DMMs, stand out as not only the most widely used but also the most versatile electrical testing instruments. They offer a range of functions, including measuring voltage, current, resistance, capacitance, continuity, and frequency. DMMs are available in various designs, from handheld portable units to benchtop models for more intricate applications.

Fluke 117 (around $270)

The Fluke 117 is a solid digital multimeter designed for electricians and field service technicians, that remains at an approachable price-point. It features True RMS technology (Root Mean Square) for accurate measurements of non-linear loads, auto-ranging, and VoltAlert™ technology for non-contact voltage detection. Its LoZ mode eliminates ghost voltages, and the large backlit display ensures visibility in dimly lit environments. The compact, ergonomic design makes it comfortable to use for extended periods, and its rugged construction ensures durability in demanding job site conditions.

In addition to its measurement accuracy, the Fluke 117 is equipped with VoltAlert™ technology, a built-in non-contact voltage detector, which enhances user safety by allowing the detection of live wires without the need for direct contact. The Low Input Impedance (LoZ) mode is another notable feature, designed to eliminate ghost voltages that can lead to misleading readings. This multimeter also boasts a large, easy-to-read display with a bright backlight, making it ideal for use in dimly lit environments. The compact and ergonomic design of the Fluke 117 ensures comfort during prolonged use, and its rugged construction ensures durability in demanding job site conditions. Overall, the Fluke 117 is a reliable, feature-rich multimeter that provides the accuracy and functionality needed by professional electricians.

Klein MM700 ($150 range)

The Klein Tools MM700 Digital Multimeter is a top choice among electricians for its durability, accuracy, and comprehensive range of features – all without breaking the bank. Designed to withstand the rigors of job site conditions, the MM700 offers True RMS capability, providing accurate measurements of non-linear loads, which is essential for dealing with modern electronic devices that can produce distorted waveforms. The auto-ranging feature of the MM700 simplifies the measurement process by automatically selecting the appropriate range for the detected signal, saving time and ensuring precision.

In addition to its robust measurement capabilities, the Klein MM700 is designed with user convenience and safety in mind. It features a large, backlit display that ensures readability in low-light conditions, making it ideal for use in dimly lit areas. The multimeter also includes a built-in thermocouple input for temperature measurements, adding to its versatility. With a CAT IV 600V / CAT III 1000V safety rating, the MM700 provides a high level of protection, making it suitable for both industrial and residential electrical work. Its rugged construction, combined with features like a low battery indicator and an auto shut-off function to conserve battery life, ensures that the MM700 is not only reliable but also user-friendly for electricians tackling a wide range of electrical tasks.

Fluke 279 FC ($1000 range)

For those seeking a high-end, feature-rich multimeter, the Fluke 279 FC is an exceptional choice. While it is far more expensive than many standard multimeters, its advanced capabilities set it apart from the competition, offering functionalities that go beyond typical testing tools. The Fluke 279 FC combines a full-featured digital multimeter with a built-in thermal imager, making it an invaluable tool for identifying hot spots, which can indicate potential issues in electrical equipment and components.

The thermal imaging feature allows electricians to visualize heat dissipation and detect problems that might not be apparent through standard measurements alone. This capability is particularly useful for preventive maintenance and troubleshooting in industrial and commercial settings, where identifying overheating components can prevent costly downtime and equipment failure. The Fluke 279 FC’s thermal imager can capture thermal images, which can be stored and shared through the Fluke Connect® app, allowing for easy documentation and collaboration with team members.

In addition to its thermal imaging capabilities, the Fluke 279 FC offers all the advanced features expected from a high-end multimeter. It includes True RMS for accurate readings of non-linear loads, auto-ranging, and a large, easy-to-read color display. The multimeter is also designed with safety in mind, featuring a CAT III 1000V / CAT IV 600V rating. The wireless connectivity provided by Fluke Connect® further enhances its functionality, enabling remote monitoring and data logging for comprehensive analysis. For professionals who need a versatile, high-performance tool that goes beyond conventional multimeters, the Fluke 279 FC is a worthwhile investment.

Testers

Testers, also known as voltage testers or volt meters, are simplified electrical testing instruments used primarily to check the presence of voltage in a circuit. They are often used for quick and basic voltage testing, but they do not provide as detailed of measurements as DMMs. Testers usually have a few LED lights or an audible indicator to show the presence of voltage. Most have a few of the fundamental measurement capabilities of a DMM, including voltage, current, resistance, and continuity and often come with either an open jaw or clamping mechanism which can detect current flow through electromagnetic induction in the jaw. Other styles of testers do not have dials and settings, rather they have a single purpose; to verify the presence of voltage or faulty wiring conditions.

Fluke T6-1000 Tester ($350 range)

The Fluke T6-1000 Electrical Tester is an incredibly reliable tool, designed to meet the needs of electricians and field service technicians. As an upgrade from the old tried-and-true T5-600, the T6 packs a strong punch that we’re all familiar with. Known for its ease of use and advanced capabilities, the Fluke T6-1000 offers a range of features that make it an essential test instrument for various electrical tasks. One of the standout features of the Fluke T6-1000 is its FieldSense technology, which allows for accurate voltage and current measurements without direct contact with live conductors. This groundbreaking feature enhances user safety by minimizing the risk of electric shock.

In addition to its contactless measurement capability, the Fluke T6-1000 can measure AC voltage up to 1000V and AC current up to 200A, making it highly versatile for different applications. The integrated open fork design allows users to measure current directly in wires without the need for test leads, further simplifying the testing process. The T6-1000 also features True RMS measurements, ensuring accurate readings even in environments with non-linear loads that produce distorted waveforms.

The large, easy-to-read display provides clear measurement readings, and the tester’s compact and ergonomic design ensures comfort during extended use. Its rugged construction ensures durability in demanding job site conditions, while the built-in LED work light enhances visibility in dimly lit environments. Additionally, the Fluke T6-1000 offers a HOLD function to capture stable readings and a low battery indicator to prevent unexpected power loss during critical tasks. If the price-point of this tester is a bit out of reach, the prior T5-600 model is still one of the best electrical testers on the market and is available for nearly a third of the price.

Klein NCVT-5A ($25 Range)

The Klein series of Non-Contact Voltage Tester Pens are versatile and dependable testers used to identify the presence of power. They’re not intended to verify whether a circuit is safe to work on, as that is the job of an actual multimeter; however when switching conductors on and off these are great identifiers to use. Known for its ease of use and precision, the NCVT-5A offers a range of features that make it an indispensable instrument for electrical testing. One of the standout features of the NCVT-5A is its dual range capability, which allows for detection of both low and standard voltage, ranging from 12 to 1000V AC. This dual range functionality makes it suitable for a variety of applications, from residential to industrial settings.

In addition to its voltage detection capabilities, the NCVT-5A is equipped with a built-in laser pointer, enhancing its utility for tasks that require pinpoint accuracy, such as identifying specific cables or components in complex systems. The tool features an intuitive visual and audible voltage indicator that provides clear feedback when voltage is detected, ensuring user safety and efficiency. For users who prefer different features, Klein offers other models of this tool that come with flashlights and laser distance measuring capabilities instead of the laser pointer. These models provide additional functionality and flexibility, catering to a variety of specific needs and preferences.

Megohmeters (Insulation Testers)

Megohmeters, also known as insulation testers, measure the resistance of electrical insulation in cables, wires, motors, transformers, and other components. They apply a high voltage to the insulation and measure the resulting current flow, indicating the insulation’s quality. These tools are amazing additions to an electrician’s tool collection as they help to identify underground faults, and insulation breakdown in conductors.

Greenlee 1kV Megohmmeter/Insulation Tester ($900 Range)

The Greenlee 1kV Megohmmeter/Insulation Tester is a highly reliable and stout piece of test equipment, specifically designed for professional use. Known for its robustness and accuracy, the Greenlee Megohmmeter offers a range of features that make it an essential instrument for testing insulation resistance in electrical systems. One of the standout features of this megohmmeter is its ability to test insulation resistance up to 1kV, making it suitable for a wide range of applications, from residential to industrial environments.

The Greenlee 1kV Megohmmeter provides accurate measurements of insulation resistance, ensuring the safety and reliability of electrical installations. Its user-friendly interface includes a large, easy-to-read digital display that provides clear and precise readings, even in challenging job site conditions. The tester also features a low resistance measurement mode, allowing for the testing of continuity and the identification of short circuits.

Built with the needs of professionals in mind, the Greenlee Megohmmeter includes a range of test voltages, enabling versatile testing capabilities. The device comes equipped with an automatic discharge circuit that ensures user safety by eliminating residual charge from the circuit under test. Additionally, the tester has a lock function for continuous testing, enhancing efficiency during extended measurement tasks.

Fluke 1587 FC Insulation Multimeter ($260 range)

The Fluke 1587 FC Insulation Multimeter is a high-performance tester that’s actually affordable. Known for its precision and advanced features, the Fluke 1587 FC combines a digital insulation tester with a full-featured true-RMS digital multimeter.

The beauty of the Fluke 1587 FC is its insulation resistance testing capability, which ranges up to 2 GΩ with test voltages of 50V, 100V, 250V, 500V, and 1000V. This wide range makes it suitable for various applications, including troubleshooting, commissioning, and preventative maintenance of electrical systems. The device also features PI (Polarization Index) and DAR (Dielectric Absorption Ratio) functions for detailed analysis of insulation quality over time.

In addition to its insulation testing capabilities, the Fluke 1587 FC operates as a full-featured multimeter, providing accurate measurements of voltage, current, resistance, capacitance, frequency, and temperature. The true-RMS measurement capability ensures precise readings in environments with non-linear loads, which can produce distorted waveforms.

The Fluke 1587 FC is equipped with Fluke Connect™ wireless technology, allowing users to transmit data in real-time to smartphones or tablets. This feature enhances productivity and safety by enabling remote monitoring and data sharing, reducing the need for direct interaction with live circuits.

Clamp-on Ammeters

Clamp-on ammeters,, also known as current clamp meters or clamp meters, enable precise current measurements without the need to break the circuit. Different brands feature a variety of jaw-like designs that clamp around a conductor, allowing the user to measure current flow through it by means of an expanding and collapsing magnetic field around the conductor.

Fluke 374 FC Clamp Meter ($500 range)

The Fluke 374 FC True-RMS AC/DC Clamp Meter is a high-precision tool, designed to meet the rigorous demands of professional electricians. This meter can measure AC and DC currents up to 600A and AC and DC voltages up to 1000V, making it suitable for a variety of applications from residential to industrial settings. The 374 is also compatible with the Fluke Connect® app, allowing for real-time data logging and sharing, which enhances productivity and simplifies reporting. Users can remotely view measurements, capture trends, and create reports directly from their smartphones.

Additionally, the Fluke 374 FC features a detachable jaw, making it easier to access and measure in tight spaces. The clamp meter also includes an inrush measurement function, which captures and analyzes startup current spikes that can cause nuisance tripping and other issues in electrical systems.

Klein CL700 Clamp Meter ($100 range)

The Klein CL700 Clamp Meter is a more price-conscious meter, specifically designed for professional electricians and maintenance technicians. The CL700 offers a range of features that make it an essential instrument for a variety of electrical testing tasks. This workhorse is True RMS capable and can measure AC current up to 600A, AC/DC voltage up to 1000V, and carries a CAT IV 600V/CAT III 1000V safety rating; making it suitable for both residential and industrial applications.

In addition to its core measurement capabilities, the Klein CL700 includes a built-in non-contact voltage tester, enhancing user safety by allowing the detection of live wires without direct contact. The meter also features a low impedance (LoZ) mode, which helps eliminate ghost voltages, ensuring more accurate readings.

The large, backlit LCD display ensures clear visibility of measurements in various lighting conditions, while the data hold function allows users to capture and review readings easily. The CL700 also includes a temperature measurement function, adding further versatility to its range of applications.

Ideal 61-765 Clamp Meter ($250 range)

The Ideal 61-765 Clamp Meter is a robust tester packed with a ton of features and functions; perfect for electricians and maintenance professionals requiring precise information-collecting. Known for its accuracy and reliability, the Ideal 61-765 offers a variety of features that make it indispensable for troubleshooting and regular maintenance tasks.

This True RMS clamp meter can measure AC current up to 600A and AC/DC voltage up to 600V, providing broad utility across different tasks. Beyond its core measurement capabilities, the Ideal 61-765 includes a built-in non-contact voltage detector, enhancing user safety by allowing the detection of live wires without direct contact. The large, backlit LCD display ensures clear visibility of measurements in various lighting conditions, while the data hold function allows users to capture and review readings easily.

Conclusion

Choosing the right multimeter for your electrical testing needs depends on the specific tasks and applications you will be working on. Digital multimeters (DMMs) are the most versatile and commonly used instruments for general electrical measurements, providing accurate readings for voltage, current, resistance, and other parameters. Testers and megohmmeters are specialized instruments for voltage testing and insulation resistance measurements, respectively. Clamp-on ammeters offer non-invasive current measurements, while specialty meters provide advanced features like temperature, frequency, phase rotation, and oscilloscope-like capabilities for specialized applications. Reputable brands like Fluke, Ideal, Klein, and Greenlee offer a wide range of reliable and high-quality instruments suitable for various industries and electrical tasks. Consider your specific requirements, the complexity of the measurements, and safety considerations when selecting the right multimeter for your needs. Always prioritize safety and accuracy in your electrical testing practices. Interested in reading how to test for voltage or resistance? Check out one of these articles next! “How to test for voltage using a multimeter” and “How to test resistance with a multimeter“