MT03A is a high-precision USB milliohm, earth bond, and motor tester designed for low-resistance measurements in industrial, automotive, energy, and maintenance applications. Capable of testing single-phase and three-phase motor windings in under one minute, it delivers accurate, temperature-compensated results with 10 µΩ resolution and advanced Kelvin measurement technology. With USB connectivity, dedicated Windows software, and compliance with UN ECE R100 earth bond testing requirements, the MT03A provides a fast, reliable solution for motor diagnostics, grounding verification, and low-resistance testing
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| Resistance measurement range | Autoranging up to 5 Ω |
| Resistance resolution | 10 µΩ |
| Resistance accuracy (typical) | ±(0.5% + 100 µΩ) |
| Input protection | ±30 V |
| Weight | <0.5 kg |
| Dimensions | 190 x 141 x 42 mm |
| Connection | USB (USB-A (2.0) cable 4.5 m and USB-C® (3.1) cable 4.5 m cable supplied) |
| PC requirements | Windows 10 or 11 (64-bit application) |
| Temperature accuracy (typical) | ±0.5 °C (0.9 °F) |
| Temperature resolution | 0.2 °C (0.36 °F) |
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