Handheld DC Resistance Tester with 0.2% Accuracy Multi-range Current Output and

Handheld DC Resistance Tester for Transformer Windings, Tap Changers & Reactors

The Handheld DC Resistance Tester is a portable instrument designed for measuring the DC resistance of transformer windings, tap changers, reactors, and other inductive components.

It is widely used for transformer manufacturing, commissioning, maintenance, overhaul, and preventive testing. With up to 10A test current, 0.1μΩ resolution, automatic current selection, automatic discharge, and a built-in rechargeable battery, it provides a fast and convenient solution for both field and laboratory testing.

*Measurement range varies according to the selected test current.

Not sure which test current or configuration fits your application? Contact Our Engineers

Up to 10A Test Current
Multiple test current levels provide flexibility for transformer windings, tap changers, reactors, and other resistance testing applications.

0.1μΩ Resolution
High-resolution measurement helps detect small resistance differences in transformer windings and electrical connections.

Automatic Current Selection
The automatic mode selects a suitable test current according to the test object, making operation faster and easier.

Built-in Lithium Battery
The rechargeable battery supports convenient field testing without continuous AC power.

Automatic Discharge & Protection
Automatic discharge after testing helps improve safety when measuring transformer windings and other inductive loads.

Data Storage
Up to 99 groups of test results can be stored, reviewed, and printed directly from the instrument.

Compact & Lightweight
With a weight of approximately 4 kg, the tester is easy to transport for field testing and maintenance.

Your Brand. Your Design. Your Requirements.

HKVTEST provides flexible OEM/ODM services for distributors, testing companies, electrical equipment suppliers, and project customers.

OEM Customization

• Logo & Branding
• Product Color
• Housing
• Packaging
• User Manual

ODM Customization

• Customized Functions
• Hardware & Software
• Appearance Design
• Application-Specific Solutions

From private-label products to customized testing solutions, our engineering and production teams can support your project from requirement confirmation to production. Visit our OEM / ODM page for full customization options, or contact us directly with your requirements.

Multilingual Support
We provide multilingual product information and technical documentation for international markets — English, Spanish, Vietnamese, and other languages on request. Available for product manuals, technical specifications, product information, and OEM/ODM documentation.

Portable & Field Ready
The compact design and built-in battery make the tester suitable for substations, transformer plants, workshops, and on-site maintenance.

Reliable & Easy to Operate
Microprocessor control, stable measurement, automatic discharge, and protection against back electromotive force provide reliable testing with simple operation.

Manufacturer Direct
HKVTEST provides direct support from R&D and production to quality control and after-sales service, helping customers communicate technical requirements efficiently.

16+ Years of Electrical Testing Equipment Manufacturing
Wuhan Hongzhi Gaocetest Electrical Technology Co., Ltd. (HKVTEST) is a professional manufacturer of electrical testing equipment with in-house R&D and production capabilities, and long-term cooperation with State Grid Corporation of China and China Southern Power Grid.

We provide direct manufacturer support throughout: R&D → Production → Quality Control → Delivery → Technical Support.

What is a DC resistance tester used for?
It is mainly used to measure the DC resistance of transformer windings, tap changers, reactors, and other low-resistance components.

What is the maximum test current?
The maximum test current is 10A.

Is it suitable for field testing?
Yes. The compact design and built-in rechargeable battery make it suitable for on-site testing.

Can I customize the tester with my own brand?
Yes. We support OEM and ODM customization, including logo, color, housing, packaging, functions, hardware, and software. See our OEM/ODM page for details.

Can you provide multilingual manuals?
Yes. Product manuals and technical documents can be provided in different languages according to your target market.

What warranty do you provide?
The tester comes with a 1-year warranty and long-term technical support, including product selection assistance, operation guidance, troubleshooting, maintenance, and spare parts support.

Need a DC resistance tester for your transformer or substation project?

Send us:

• Test Object:
• Required Current / Resistance Range:
• Application:
• OEM/ODM Requirements:
• Quantity:
• Destination / Test Location:

Our engineers can recommend the appropriate tester, configuration, accessories, and customization options based on your requirements.

Request a Quote

Email: fionahuang60@gmail.com
WhatsApp: +86 18071531810

Wuhan Hongzhi Gaocetest Electrical Technology Co., Ltd. (HKVTEST) has more than 16 years of experience in electrical testing equipment R&D and manufacturing, with long-term technical cooperation with State Grid Corporation of China and China Southern Power Grid, and project partners across multiple international markets.

With in-house engineering and production capabilities, we provide both standard testing instruments and customized OEM/ODM solutions for customers worldwide — focusing on reliable products, flexible customization, and professional technical support for long-term international cooperation.