The Martindale CM79 AC/DC True RMS Clamp Meter is designed for electricians, solar installers, EV technicians and maintenance engineers who need accurate AC and DC current measurements in a compact, easy-to-use instrument. Ideal for commercial, industrial and renewable energy applications, it combines True RMS accuracy with essential multimeter functions for efficient fault finding and routine maintenance.
Designed for Modern Electrical Testing
The CM79 measures AC/DC current up to 600 A and AC/DC voltage up to 600 V, making it suitable for testing electrical installations, battery systems, UPS equipment and photovoltaic (PV) installations. Its elliptical jaw accepts conductors up to 25 mm diameter or 45 × 15 mm busbars, while the thumbwheel operation allows convenient one-handed use. Practical functions including Min/Max Hold, Data Hold, auto-ranging and a backlit display make everyday testing quicker and easier.
Why Choose the Martindale CM79?
Built for professional electrical work, the CM79 delivers reliable True RMS measurements in a rugged, pocket-friendly design. Whether you're monitoring charging currents, troubleshooting DC systems or carrying out routine electrical maintenance, it provides dependable performance with the quality expected from Maartindale.
Order today to enjoy free delivery, expert support and our 90-day satisfaction guarantee. Need advice? Our team is here to assist you.
Why choose Instrotech for your electrical test equipment?
With over 40 years’ experience supporting UK electricians, technicians and engineers, Instrotech is your trusted partner for quality tools and expert service. When you purchase from us, you benefit from:
Free UK shipping on orders over £99
Access to our knowledgeable technical support team
Available calibration services to maintain safety compliance
A 90-day money-back guarantee for complete peace of mind
We’re committed to helping you work safely and efficiently with industry-leading products and ongoing support.
