Martindale FD550 Digital Circuit Breaker and Fuse Finder
What is the Martindale FD550?
The Martindale FD550 Digital Fuse Finder is a precise, easy-to-use tester designed for electricians and electrical maintenance technicians who need to quickly locate fuses and circuit breakers without disconnecting power. It helps identify which fuse or breaker protects a specific socket or circuit, making fault-finding, maintenance and installation work faster and safer.
How does the FD550 simplify fault finding?
The FD550 comes with a transmitter and digital receiver that work together to trace the correct fuse or breaker instantly. Its clear LED and audible signals make detection simple even in noisy environments. Designed for live circuit testing, it eliminates guesswork and reduces downtime on-site, ideal for electricians managing domestic, commercial or industrial installations.
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 all orders
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.
