



The Uni-T UT139C is a solid choice for electricians, technicians, and DIY enthusiasts who need reliable true RMS measurements without breaking the bank. Its well-rounded features, safety rating, and ergonomic design make it a dependable tool for a wide range of electrical tasks. While it lacks advanced connectivity features, it delivers excellent value for the price and is recommended for those prioritizing accuracy and durability in a handheld multimeter.
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How this product performed across our four scoring axes during in-house benchmarking.
A quick visual of how this handheld multimeter compares to the category average across four lab tests.
The Uni-T UT139C true RMS multimeter is a reliable handheld measuring tool designed for both professionals and hobbyists who require precise electrical measurements. It offers true RMS measurement, ensuring accurate readings on non-linear loads, a critical feature for modern electronics and industrial equipment. The device supports a broad range of functions including AC/DC voltage, current, resistance, capacitance, and frequency, making it versatile for various diagnostic and troubleshooting tasks.
Featuring a clear backlit LCD display, the UT139C provides easy readability even in low-light conditions. Its compact and ergonomic design fits comfortably in the hand, with a protective rubber holster that enhances durability and grip. The multimeter includes a data hold function to freeze readings on the display, as well as a low battery indicator to help avoid inaccurate measurements.
Safety is prioritized with CAT III 600V rating, allowing safe use in residential and commercial electrical environments. While the UT139C offers essential features for electrical testing, it remains competitively priced, making it an appealing choice for users who want a balance of performance and value in a true RMS multimeter.