--- description: Achieve precision and dependable outcome with our Contact Resistance Tester from DEMIKS. Place your order now to foster your testing procedures. title: Purchase Contact Resistance Tester from China - DEMIKS image: https://demikspower.com/wp-content/uploads/2025/05/2-25.png --- [Skip to content](#content) ## Top Contact Resistance Tester Manufacturers and Suppliers in China # Contact Resistance Tester Searching for a trustworthy contact resistance tester for your industry? DEMIKS is amongst the prominent manufacturers and suppliers of contact resistance testers in China. The contact resistance testers we manufacture are durable and very precise. Regardless of you being in the electrical or telecommunications or even the automotive industry, our contact resistance testers will serve you well. ## HLY-301A - **Use case**: Best suited for contact resistance and micro-resistance measurements for high-voltage switches operating at high currents (>100A), applicable in the power industry and scientific research. - **Industry Leading**: Achieves an unrivaled resolution capability of 0.01μΩ. - **Consistent Performance**: Measurement results remain the same, even when there are harsh disturbances. - **New Innovations**: uses foreign microcomputers and integrates other technological innovations such as auto ranging. ![HLY-301A](https://demikspower.com/wp-content/uploads/2025/05/2-26.png) [HLY-301A-1](https://demikspower.com/wp-content/uploads/2025/05/2-23.jpg) [HLY-301A-2](https://demikspower.com/wp-content/uploads/2025/05/4-22.jpg) [HLY-301A-3](https://demikspower.com/wp-content/uploads/2025/05/5-17.jpg) [HLY-301A-4](https://demikspower.com/wp-content/uploads/2025/05/6-13.jpg) [HLY-301A-5](https://demikspower.com/wp-content/uploads/2025/05/7-6.jpg) [HLY-301A-6](https://demikspower.com/wp-content/uploads/2025/05/1-16.jpg) | Model | Measurement Range | Output Current | Measurement Accuracy | Display Method | Communication Mode | Printer | | --- | --- | --- | --- | --- | --- | --- | | HLY-301 | 0～1999μΩ | 0\~100A | 1μΩ | LED | | / | | HLY-302 | 0～2999.9μΩ | 50\~200A | 0.01μΩ | LCD | USB or RS232 serial port | With printer | | HLY-303 | 0～2999.9μΩ | 100\~400A | 0.01μΩ | LCD | USB or RS232 serial port | With printer | | HLY-304 | 0～2999.9μΩ | 100\~600A | 0.01μΩ | LCD | USB or RS232 serial port | With printer | ![HLY-301B](https://demikspower.com/wp-content/uploads/2025/05/2-27.png) ## HLY-301B - **Application**: Performs contact resistance tests of high-voltage switches with current ≥100A. - **Versatility**: Capable of micro-resistance measurement across multiple sectors. - **Stability**: Orderly, repeatable readings in the presence of disturbances. - **Operability**: Perfect for manufacturing, administrative tasks, scientific exploration, and teaching. - **Resolution**: Best available at 0.01μΩ. [HLY-301B-1](https://demikspower.com/wp-content/uploads/2025/05/7-7.jpg) [HLY-301B-2](https://demikspower.com/wp-content/uploads/2025/05/8-6.jpg) [HLY-301B-3](https://demikspower.com/wp-content/uploads/2025/05/5-18.jpg) [HLY-301B-4](https://demikspower.com/wp-content/uploads/2025/05/3-20.jpg) [HLY-301B-5](https://demikspower.com/wp-content/uploads/2025/05/4-23.jpg) [HLY-301B-6](https://demikspower.com/wp-content/uploads/2025/05/1-17.jpg) ## HLY-301C - **Application Scope**: The HLY series contact resistance tester is intended for the ultra-precise measurement of high voltage switch (loop) contact resistance.In widespread for use by Electricians in production, Electric power operations, research and educational units. - **Stable and Repeatable Readings**: The device yields static and identical measurements despite extremely repeatable and severe disturbances ensuring accuracy and reliability in challenging enviroments. - **Continuous Large Current Output**: As the most recent power technologies are incorporated into the tester, continuous output of large current over long periods is possible guaranteeing adequate performance during prolonged tests. ![HLY-301C](https://demikspower.com/wp-content/uploads/2025/05/2-30.png) [HLY-301C-1](https://demikspower.com/wp-content/uploads/2025/05/7-8.jpg) [HLY-301C-2](https://demikspower.com/wp-content/uploads/2025/05/5-19.jpg) [HLY-301C-3](https://demikspower.com/wp-content/uploads/2025/05/1-18.jpg) [HLY-301C-4](https://demikspower.com/wp-content/uploads/2025/05/6-14.jpg) [HLY-301C-5](https://demikspower.com/wp-content/uploads/2025/05/8-7.jpg) [HLY-301C-6](https://demikspower.com/wp-content/uploads/2025/05/3-21.jpg) ![HLY-302A](https://demikspower.com/wp-content/uploads/2025/05/2-31.png) ## HLY-302A - **Disturbance Resistance**: Stable, repeatable readings are achieved in the presence of interference. - **High Accuracy**: Results are exact owing to the newest power technology used. - **Advanced CPU**: The measurements are taken faster as the system signal’s range is detected by the high-performance CPU which automatically changes the measuring range for such values. [HLY-302A -1](https://demikspower.com/wp-content/uploads/2025/05/9-4.jpg) [HLY-302A -2](https://demikspower.com/wp-content/uploads/2025/05/1-19.jpg) [HLY-302A -3](https://demikspower.com/wp-content/uploads/2025/05/5-20.jpg) [HLY-302A -4](https://demikspower.com/wp-content/uploads/2025/05/8-8.jpg) [HLY-302A -5](https://demikspower.com/wp-content/uploads/2025/05/3-22.jpg) [HLY-302A -6](https://demikspower.com/wp-content/uploads/2025/05/4-24.jpg) ## HLY-302B - **High-Voltage Compatibility**: Engineered for accurate loop resistance checks in high-voltage switchgear. - **Continuous High Current**: Delivers repeated large currents for extended durations. - **Automatic Range Adjustment**: Adapts to different ranges without manual intervention as per signal level. ![HLY-302B](https://demikspower.com/wp-content/uploads/2025/05/2-32.png) [HLY-302B-1](https://demikspower.com/wp-content/uploads/2025/05/4-25.jpg) [HLY-302B-2](https://demikspower.com/wp-content/uploads/2025/05/3-23.jpg) [HLY-302B-3](https://demikspower.com/wp-content/uploads/2025/05/2-24.jpg) [HLY-302B-4](https://demikspower.com/wp-content/uploads/2025/05/6-15.jpg) [HLY-302B-5](https://demikspower.com/wp-content/uploads/2025/05/4-26.jpg) [HLY-302B-6](https://demikspower.com/wp-content/uploads/2025/05/1-21.jpg) ![HLY-303A](https://demikspower.com/wp-content/uploads/2025/05/2-33.png) ## HLY-303A - **Universality**: Applicable to Electricians, Power operations, Researchers, and education. - **Withstanding High Current**: Over 100A continuous high current output. - **Stable Readings**: Performance maintained during disturbances. - **Reliable Performance**: Long term operation without difficulty. - **Up to Date Technology**: Latest power systems included. [HLY-303A-1](https://demikspower.com/wp-content/uploads/2025/05/1-22.jpg) [HLY-303A-2](https://demikspower.com/wp-content/uploads/2025/05/3-24.jpg) [HLY-303A-3](https://demikspower.com/wp-content/uploads/2025/05/4-27.jpg) [HLY-303A-4](https://demikspower.com/wp-content/uploads/2025/05/5-22.jpg) [HLY-303A-5](https://demikspower.com/wp-content/uploads/2025/05/2-25.jpg) ## HLY-306B Intelligent Microohm Meter - **Upgraded Display and Interface**: User-friendly interface with a 7'' color touch screen, high-speed printer with customizable background settings. - **Extensive Data Management**: Enhanced files storage coupled with USB/BT data control, alongside outputs in Excel and Word, and Modbus-RTU protocol. - **All-In-One Testing Capabilities**: Stepwise current testing with multiphase and long duration testing alongside large current output and DC constant current source. - **Exact Measurement**: Standard condition resistance measurement alongside high-precision amplifiers and temperature offset calculation utilizing a quadruple integral A/D converter. ![HLY-306B Intelligent Microohm Meter](https://demikspower.com/wp-content/uploads/2025/05/2-34.png) [HLY-306B-1](https://demikspower.com/wp-content/uploads/2025/05/2-26.jpg) [HLY-306B-2](https://demikspower.com/wp-content/uploads/2025/05/3-25.jpg) [HLY-306B-3](https://demikspower.com/wp-content/uploads/2025/05/4-28.jpg) [HLY-306B-4](https://demikspower.com/wp-content/uploads/2025/05/5-23.jpg) [HLY-306B-5](https://demikspower.com/wp-content/uploads/2025/05/6-16.jpg) [HLY-306B-6](https://demikspower.com/wp-content/uploads/2025/05/7-9.jpg) | Specification | 600A | | --- | --- | | Measurement range | 50A,100A,150A,200A,300A,400A,500A,600A,customized | | Test range | 0\~1999μΩ expandable | | Test precision | 0.5%rdg±10dgt | | Resolution | 0.01μΩ | | Working power | AC 220V±10%     50/60Hz±2% | | Length (mm) | 470 | | Width(mm) | 320 | | Height(mm) | 310 | | Weight(kg) | 20 | | Environment temperature | －25℃-50℃ | | RH | ≤90%RH | ![HLY-SC-301B](https://demikspower.com/wp-content/uploads/2025/05/2-35.png) ## HLY-SC-301B - **Objective**: to measure the contact resistance of high-voltage switches with great accuracy. - **High Resolution**: Attains 0.01μΩ resolution, which is unsurpassed anywhere. - **Auto Range**: Changes diopter arrangement depending on the size of the signal received. - **Precision**: Consistently achieves high reliability of measurement. - **Adaptability**: Appropriate for the measurement of micro resistance. [HLY-SC-301B-1](https://demikspower.com/wp-content/uploads/2025/05/7-10.jpg) [HLY-SC-301B-2](https://demikspower.com/wp-content/uploads/2025/05/2-27.jpg) [HLY-SC-301B-3](https://demikspower.com/wp-content/uploads/2025/05/1-23.jpg) [HLY-SC-301B-4](https://demikspower.com/wp-content/uploads/2025/05/3-26.jpg) [HLY-SC-301B-5](https://demikspower.com/wp-content/uploads/2025/05/5-24.jpg) [HLY-SC-301B-6](https://demikspower.com/wp-content/uploads/2025/05/6-17.jpg) ## Understanding Contact Resistance Test Acceptable Value in Electrical Testing In electric power plants, contact resistance poses a serious threat of overheating, energy loss, or even catastrophic failure if left unchecked, hence it must be maintained at a level within stringent safety and reliability thresholds. ![995f9ce8 line4 1](https://demikspower.com/wp-content/uploads/2025/05/995f9ce8-line4-1.png) [enquiry now](#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjI1MyIsInRvZ2dsZSI6ZmFsc2V9) [More details](https://demikspower.com/blog/contact-resistance-test-acceptable-value/) Featured Blog Topics ## Insights, Tips & Trends [View All Blog](https://demikspower.com/blog/) [![ONAN Transformer Full Form: Meaning, Cooling and Ratings](https://demikspower.com/wp-content/uploads/2026/11/onan-transformer-full-form-featured.png)](https://demikspower.com/blog/onan-transformer-full-form/) [ONAN Transformer Full Form Explained: From Cooling Code to Rated Duty](https://demikspower.com/blog/onan-transformer-full-form/) November 3, 2026 The full form of an ONAN transformer is Oil Natural Air Natural. 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ONAN means Oil Natural Air Natural: oil circulates [Read More](https://demikspower.com/blog/onan-vs-onaf/) × ###### Contents Contents Scroll to Top WhatsApp us Get in touch with DEMIKS company Contact Form 在用 Your Name \* Email Phone/WhatsApp Your Message Submit Form ```json {"@context":"https://schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https://demikspower.com/switchgear-test-equipment/contact-resistance-tester/#breadcrumb","itemListElement":[{"@type":"ListItem","position":"1","item":{"@id":"https://demikspower.com","name":"Home"}},{"@type":"ListItem","position":"2","item":{"@id":"https://demikspower.com/switchgear-test-equipment/","name":"Switchgear Test Equipment"}},{"@type":"ListItem","position":"3","item":{"@id":"https://demikspower.com/switchgear-test-equipment/contact-resistance-tester/","name":"Contact Resistance Tester"}}]}]} ```