UNI-T UT3550 — The UT3550 measures battery internal resistance and voltage together using a 4-wire Kelvin connection and 1 kHz AC injection — the method that reveals a weak cell before it fails under load. It resolves internal resistance from 0.001 mΩ to 30 Ω at ±0.5% and voltage to 100 V at ±0.05%, covering everything from small consumer cells to large industrial battery banks. Genuine UNI-T product supplied by Digilog.pk with warranty.

Key Features

• AC-injection internal-resistance method (1 kHz)
• Internal resistance 0.001 mΩ to 30 Ω, ±0.5%
• Voltage 0.0001 V to 100 V, ±0.05%
• 4-wire Kelvin connection removes lead resistance
• Comparison function with pass/fail sorting
• Data logging to 500 groups; CSV export over USB-C
• Dual display (LCD & OLED); IP65 sealing

Technical Specifications

What's in the Box

• Bench digital multimeter
• Power cord
• Test leads
• USB cable
• English user manual
• Calibration certificate

Downloads

• UNI-T UT3550 Product Page, Datasheet & Manual

Certifications: CE, RoHS | HS Code: 9030.31