Portable DC Low Resistance Tester

Ultra-high resolution down to 0.001mΩ (4110B) – detects extremely small resistance changes in contact resistance, bond testing, and shunt measurements.

Wide measurement range (0.000mΩ ~ 300kΩ) – covers everything from micro-resistance of circuit breakers to kilo-ohm cable insulation checks.

Model 4110A (100mΩ ~ 20kΩ) – optimized for contact resistance, relay coils, transformer windings, and general low-resistance testing.

Model 4110B (10mΩ ~ 300kΩ) – adds 10mΩ and 10kΩ/100kΩ/300kΩ ranges for even lower resistance and higher resistance applications.

Residual resistance (Rk) cancellation function – removes test lead resistance from measurements for true device-under-test values.

Hot spot potential elimination – single-button measurement cancels thermoelectric EMFs that cause errors in low-resistance testing.

Pass/Fail (✓/✗) comparison test with audible alarm – preset upper/lower limits for go/no-go testing; buzzer alerts when out of tolerance.

Internal memory for 100 measurement groups – stores data on-device for manual recording and later review without external software.

Measurement value HOLD function – freezes the display for easy recording in awkward positions or dark areas.

Segment LCD dual display (42×80mm) with white LED backlight – shows primary and secondary readings simultaneously; backlight adjustable 0–90 minutes.

Adjustable auto shut-down (0–90 minutes) – user-configurable power-off timer to save batteries during long tests or extended field work.

Three power supply options – runs on 8×AA alkaline, 8×AA Ni-MH rechargeable, or 12V power adapter for lab or field flexibility.

Rugged mechanical design – withstands random vibration (2g, 5–500Hz) and 1-meter drop tests for industrial environments.

High withstand voltage (AC 8320V for 5 seconds) – provides operator and device safety during transformer or motor winding tests.

Insulation impedance ≥1000MΩ @ DC1000V – ensures excellent isolation between measurement circuits and case.

Rated transient overvoltage 6kV (1.2/50μs) – survives surges from inductive loads or switching transients on test lines.

Operating altitude up to 2000m (indoor use) – suitable for most industrial and laboratory settings.

Wide temperature and humidity range (0~40°C, ≤85%RH) – reliable performance in workshop or field conditions.

Storage temperature (-20~60°C, ≤90%RH) – safe for transport and storage across seasons.

Compact size (178×110×59mm) and moderate weight (~600g) – portable enough for field use yet stable on a lab bench.