10 Best The Fluke Multimeter 2025 in the United States

The Fluke 28IIEX/ETL Intrinsically Safe True-Rms Digital Multimeter is a robust tool designed for use in hazardous environments such as oil refineries and mining operations. Its intrinsic safety features ensure it can be used in explosive atmospheres without risk, making it highly suitable for professionals working in these fields. The True-RMS capability of the multimeter ensures accurate readings regardless of whether the current or voltage waveform is sinusoidal or nonsinusoidal, which is crucial for technical precision in various scenarios.

It measures a wide range of parameters, including voltage, current, conductance, duty cycle, capacitance, frequency, and temperature, and can perform resistance, continuity, and diode tests, making it a versatile tool for a broad range of applications. The device includes a low-pass filter to block unwanted voltages for accurate measurements, especially useful when working with inverters and variable-frequency motor drives. The LCD display provides clear readings, although it may not be backlit, which could be a drawback in low-light environments.

Safety-wise, it has impressive ratings, including IP67, which denotes it is dust-tight and can withstand immersion in water up to a meter deep. It is also certified for use in environments with explosive gases and conductive dust, offering peace of mind in industrial settings. The additional certification for Category III installations up to 1000V and Category IV installations up to 600V indicates its suitability for high-voltage professional use. Weighing 2.95 pounds, it’s relatively heavy, which may affect portability for some users. With a decent battery life and a robust build, it is durable and reliable for rigorous industrial use.

The Fluke 789 ProcessMeter is a robust and versatile tool designed for industrial and scientific use. One of its significant strengths is its accuracy and wide range of measurement capabilities. It can measure and source 4-20 mA signals, making it particularly useful for professionals working in process control. The built-in 24V loop power supply is another excellent feature, allowing users to power and test process instruments directly without additional equipment.

This ProcessMeter also includes standard digital multimeter (DMM) capabilities, which adds to its versatility. The accuracy is reliable, and the device offers manual and automatic stepping on mA output, which can enhance efficiency during testing and calibration tasks. The selectable 250-Ohm Hart resistor and quick span check buttons further facilitate ease of use in various scenarios. Safety is a top priority with the Fluke 789. It offers 1000V overload protection on voltage, ohms, and frequency measurements, and 150V overload protection on current measurements. These are significant safeguards, especially in industrial settings. Moreover, the device is backed by a robust 440 mA 1000V fuse.

The display is another notable feature; it is a large dual screen with enhanced backlight, making it easy to read even in low-light conditions. The backlight has two brightness settings to suit different environments. However, there are a few drawbacks to consider. The battery life, while decent, may require frequent changes if you're sourcing current often, as it runs about 12 hours typical when sourcing 12 mA. Additionally, the device is relatively heavy at 1.34 pounds and might be cumbersome for prolonged handheld use. Despite these minor downsides, the Fluke 789 ProcessMeter stands out as a highly reliable and feature-rich tool, ideal for professionals in process control and industrial settings.

The Fluke 378FC AC/DC TRMS Non-Contact Voltage Wireless Clamp is a robust and versatile multimeter. One of its standout features is FieldSense technology, allowing for faster and safer testing without the need to touch live wires. This enhances both user safety and efficiency. The clamp jaw design is convenient for measuring voltage and current, and the iFlex feature extends its measurement range, making it suitable for various applications, including complex electrical systems.

It also includes a Power Quality indicator, which helps diagnose whether issues stem from equipment or power lines, adding a layer of diagnostic capability that's valuable in troubleshooting scenarios. The device is well-regarded for its accuracy, essential for reliable readings in professional settings. Its wireless capability makes it easy to record and share data, reducing manual logging time.

However, the weight of 3.28 pounds might be a slight drawback for users who need to carry it around frequently, and the size might be cumbersome in tight spaces. The display quality, while sufficient, could benefit from enhanced visibility in low-light conditions. Safety ratings are robust, ensuring compliance with industry standards, and the inclusion of two AA batteries provides convenience. This multimeter is well-suited for professional electricians and technicians who require precise, safe, and efficient tools for complex electrical testing and diagnostics.