Uni-T UT512 High Voltage Insulation Resistance Tester

The Uni-T UT512 high-voltage insulation resistance tester is an advanced measuring device designed for diagnosing electrical installations and large machines such as transformers, generators and high-voltage motors. It offers a wide range of test voltages up to 2500 V, insulation resistance measurement up to 100 GΩ, and PI and DAR functions that help assess the condition of the insulation over time. Thanks to the memory for 18 data sets, USB communication and PC software, subsequent analysis of the results is possible. The large display with an analog bar graph allows for quick reading, and automatic functions increase comfort and safety during operation.

Stable and accurate measurements

UT512 allows insulation resistance measurements at different test voltages, which allows parameters to be adapted to the device under test. This makes the results more reliable and allows the user to better assess the actual condition of the installation. In addition, the PI and DAR functions support analysis of insulation quality over time, which is important for industrial equipment diagnostics.

Clear display and user-friendly operation

The large, high-resolution display with 30-segment bar graph allows for quick evaluation of the result without having to analyze the numbers in detail. The backlight makes it easier to work in low light conditions, and the intuitive operation makes the device suitable for use both in the field and in the workshop.

Features that improve safety at work

The tester is equipped with automatic current discharge and high voltage signaling, which reduces the risk of errors and improves user safety. In addition, the device warns the user when the measurement range is exceeded or the battery is low, helping to prevent unreliable measurements.

Data analysis and computer communication

Thanks to the built-in memory, up to 18 sets of results can be stored and then transferred to a computer via USB. The included software allows data analysis, which is particularly useful for regular inspections and documentation of the condition of the installation.

Included in the kit

• Insulation Resistance Tester Uni-T UT512
• Red test lead (two-pin) with alligator clip
• Test leads (single) with crocodile clips (2 pieces)
• Power supply
• USB cable
• CD with computer software
• Battery pack (8 × 1.5V LR14)

Warranty: 24 months

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Same summary

The Uni-T UT512 high-voltage insulation resistance tester is a digital handheld instrument that is best suited for professionals and advanced hobbyists who need a high measurement range of over 1000 V when checking the insulation of electrical installations and devices. Due to its specialization in high-voltage measurements, it is suitable where basic multimeters are not sufficient, for example when working in industry, construction or regular network security testing. For everyday or just home repairs where there is no need to measure high voltages, this model may be too extensive, so we advise choosing according to the actual area of application.

Recommendation source: Enaa guides and team experiences.

User view

Such testers are typically found in the hands of users who regularly perform measurements in more demanding environments, such as electricians, inspectors or experienced craftsmen in industry and construction. They are particularly useful where insulation testing is crucial for the safety of equipment and people, as well as in major renovation projects.

The consistency of measurements and the expanded ecosystem of Uni-T brand accessories allow users to trust the accuracy and repeatability of results, which is essential for critical tasks.

Why buy at Enaa

At Enaa, our range of expertly selected measuring instruments is tailored to the needs of different users, so you can easily find the right tool for specific measurements. In addition, we clearly label key technical features for easier comparison between models.

Answers to frequently asked questions

What types of voltages is the Uni-T UT512 suitable for?

This model is designed to test insulation resistance at high voltages, making it ideal for use in professional environments where voltages are higher than typical household circuits.

Is it also suitable for basic household repairs?

Although it is technically capable of basic functions, its high measurement range makes it more suitable for specialized use and professionals, as such parameters are mostly unnecessary for normal household repairs.

What does it mean that the tester is digital and manual?

The digital display allows for clear and accurate reading of values, while the manual version means greater mobility and flexibility when working in different locations.

How important is moisture protection for this model?

Moisture protection is recommended if the tester is used in the field, construction, or other environments where it is exposed to moisture or dust. However, if it is used exclusively in dry indoor areas, this feature is not essential.

Are there any add-ons or upgrades available for this tester?

Various accessories, such as probes and protective bags, are usually available for the Uni-T UT512, which facilitate and protect use in demanding tasks.

Description updated: June 2026