The Martindale CM55 AC Clamp Meter is designed for electricians and electrical maintenance technicians who need a compact, reliable clamp meter for everyday electrical testing. Ideal for installation, servicing and fault finding, it measures AC current, AC/DC voltage, resistance and continuity in one easy-to-use instrument.
Essential Measurements for Everyday Testing
The CM55 measures AC current up to 400 A without breaking the circuit, alongside AC/DC voltage up to 600 V, making it suitable for testing electrical installations, distribution boards and commercial equipment. Auto ranging, a hold function and single-handed thumbwheel operation help improve efficiency when working in confined spaces.
Compact and Built for the Job
Featuring an ergonomic design with a 25 mm jaw opening, auto power off and a CAT III 600 V / CAT IV 300 V safety rating, the CM55 is built for dependable day-to-day electrical work. Why choose the CM55? It provides the essential measurements electricians need in a lightweight, pocket-friendly clamp meter that's simple to use on site.
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.
