The Handheld Loop Resistance Tester is a high-precision portable instrument designed for measuring contact resistance and loop resistance in high-voltage electrical equipment.

It is widely used in power system maintenance, substations, switchgear testing, and circuit breaker inspection.

With a high-current output of up to 100A and ultra-low resistance measurement capability, the device ensures stable and accurate results in field testing environments.

• 7-inch full-color touch screen for easy operation
• High current output up to 100A
• Multiple test current options (30A / 50A / 80A / 100A)
• Resolution up to 0.01μΩ
• Accuracy up to ±0.5%
• Supports up to 60s test duration
• Built-in open circuit and overheat protection
• Data storage up to 1000 test records
• High-capacity lithium battery supports 600+ tests per charge
• Intelligent power management system
• Optional Bluetooth printing function
• Portable handheld design

The instrument works based on the high current injection method. A stable DC current is injected into the tested loop, and the voltage drop is measured. The resistance value is calculated using the formula:

R = U / I

• Circuit breaker contact resistance testing
• Switchgear loop resistance measurement
• Substation maintenance
• Power system inspection
• Electrical equipment commissioning
• Industrial electrical testing

It is used to measure contact resistance and loop resistance in electrical equipment such as circuit breakers and switches.

It supports up to 100A output current.

Yes, it is battery powered and designed for outdoor field use.

Yes, it can store up to 1000 test records.

Yes, optional Bluetooth printer is supported.

The Handheld Loop Resistance Tester comes with a 2-year warranty, including technical support and repair service during the warranty period.