Refine On (Hebei) Electric Power Technology Co., Ltd. is one of the leading manufacturers and suppliers of loop resistance tester in China. If you're going to wholesale durable loop resistance tester, welcome to get quotation from our factory. All customized products are with high quality and competitive price.
We build the NRH40‑100 loop resistance tester with reliable switching power supply and standard electronic circuit design. We check each unit carefully for safety, accuracy and stability before shipment.
We design our NRH40‑100 loop resistance tester to measure the contact resistance of switches, cables and welds, we adopt the four‑wire testing method to ensure stable and accurate measurement results, this instrument is equipped with a 7‑inch 800×480 color touch screen, supports multiple current levels and can calculate average values automatically, displays resistance, voltage, current and resistivity in real time and will send an alarm when the measured value exceeds the set limit, it can work continuously with cooling and thermal protection, has a built‑in clock and large data storage with power‑off protection, and can even work as a DC constant current source.
Product Parameters
|
Model |
NRH40‑100 |
|
Test current |
50A/100A |
|
Measuring range |
0–19999μΩ |
|
Accuracy |
0.5%rdg±10dgt |
|
Resolution |
0.01μΩ |
|
Working power |
AC220V±10%,50Hz±2% |
|
Working temperature |
-25℃–50℃ |
|
Relative humidity |
≤90%RH |
|
Dimensions |
450mm×250mm×220mm |
|
Weight |
9.9kg |
Product Applications
We use the NRH40‑100 loop resistance tester in power systems, substations, power plants and electrical equipment maintenance. It tests loop resistance for high voltage and low voltage switches, cables, connectors and welds. It is suitable for on site inspection, factory testing and routine maintenance of electrical equipment.

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Frequently Asked Questions (FAQ)
Q: Do you offer bulk discounts?
A: Yes, discounts are available for large orders.
Q: Can I get a sample?
A: Yes, samples are available for quality check.
Q: When will you send samples?
A: Within 15 working days after payment.
Q: What's your MOQ?
A: Standard MOQ: 1 pcs. Trial orders welcome.
Q: Is it easy to operate?
A: Yes. It uses a touch screen with clear menus and built in guidance diagrams.
Q: What safety rules should we follow?
A: Connect the ground wire before use. Do not operate with open covers. Use only standard power cords and fuses.
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