Major Tech has introduced the MT329 handheld electrical installation multifunction tester, the ultimate solution for electricians looking for versatility, accuracy, and mobility in one compact device. Designed for professional electrical installations, compliance testing, and maintenance, the MT329 packs a wide range of essential test functions into a rugged, easy-to-use handheld instrument.
The MT329 combines insulation resistance, continuity, loop impedance, RCD, voltage, resistance, and phase sequence testing into one tool, eliminating the need to carry multiple devices on site. With CAT IV 300 V safety rating, it’s built for the demands of modern electrical environments, offering both safety and peace of mind.
One of the standout features of the MT329 is its loop impedance testing. This includes a high-current test up to 18.3 A and a ZL-PE RCD-safe method, ensuring RCDs rated above 30 mA do not trip during testing, which is critical for safety and accurate loop measurements. The device also provides Prospective Fault Current (PFC) and Prospective Earth Fault Current (PEFC) readings to assist in fault diagnosis.
RCD testing is another area where the MT329 shines. It supports testing for Type-A, Type-AC, and Type-B RCDs, with trip time tests at 0.5x, 1x, 2x, and 5x nominal current. The auto RCD test function simplifies repetitive testing, while the RCD Trip Level Test verifies precise tripping thresholds. A built-in auto-discharge feature ensures safe voltage release after insulation tests, a vital safety component for daily use.
The insulation resistance test operates at 250 V, 500 V, and 1,000 V, and can measure insulation values up to 4,000 MΩ, making it suitable for both low- and high-voltage applications. In addition to insulation and voltage measurements (AC and DC up to 500 V), the MT329 features AC+DC auto-mode, low-ohm resistance, data hold, and auto power off to conserve battery life.
What truly sets the MT329 apart is its Bluetooth connectivity. With built-in memory and wireless data transfer to iOS and Android devices via the Major Tech app, electricians can easily store, review, and share test results on the go. This functionality is ideal for producing compliance reports and streamlining workflow in both residential and commercial settings.
The large backlit multi-LCD display provides clear, simultaneous readings, even in low-light environments, enhancing user convenience and reducing the chance of error.
Whether you’re performing installation checks, preventative maintenance, or troubleshooting, the Major Tech MT329 is the multifunction tester that delivers. Compact, powerful, and built with the electrician in mind – this is the tester you’ve been waiting for.
