In the world of electrical testing, there are two kinds of gear: the kind that just gets by, and the kind you can trust with your life.
At Duncan Instruments, we’ve spent decades working with test equipment—from service benches to job sites across Canada. We know what holds up under pressure, what fails when it shouldn’t, and which gear simply doesn’t belong in a technician’s kit (we’re looking at you, bargain-bin test leads that turn stiff as rebar in the cold).
Our service department has seen it all. Including what happens when fault current travels through unfused leads:
🧯 Scorched meters. Melted insulation. Risk to the user.
We knew we could do better. So we did.
💡 The Mission: Build the Leads We’d Use Ourselves
When we set out to develop our own fused test leads, we had one clear goal:
👉 Design the safest, most reliable fused multimeter leads available in Canada.
⚠️ Why Fuse Placement Matters More Than You Think
When something goes wrong in the field, it happens fast. A short circuit doesn’t give you a second chance. In those first milliseconds, a poorly placed fuse can be the difference between a close call and serious damage.
Most test leads depend on your multimeter’s internal fuse—meaning a fault travels through the entire lead before it’s interrupted.
We’ve seen that go wrong too many times.
That’s why our Sterling SFTL 1000V CAT IV fused test leads feature:
-
🔹 Fuse positioned right at the probe tip—to stop faults at the source
-
🔹 German-made fuses, known worldwide for their precision and reliability
-
🔹 Assembled to spec in Taiwan, and tested in Canada by the people who actually use them
❄️ Built for Canadian Winters
Electrical work doesn’t stop for snow, and neither should your leads. Our cold-resistant double-insulated jacket keeps the leads flexible—even after a weekend in a freezing service truck.
-
🔹 High-quality multi-strand copper core
-
🔹 Contrasting inner insulation shows visible wear before it becomes a safety hazard
-
🔹 Durable outer layer withstands rough field conditions
đź’¬ What Canadian Technicians Are Saying
“Finally, test leads that give me real peace of mind! The fusing on these Duncan leads is a game-changer for safety.”
— Alex, Electrical Technician, Toronto
“Even when working in the cold, they stay flexible and easy to use.”
— Bob, Electrician, Kitchener-Waterloo
“The crocodile clips are top-notch! Delicate wire or thick bolt—they grab and hold.”
— Utility Worker, Ottawa
🔧 Designed by Technicians. Backed by Service.
We’re not in the business of gimmicks. We built these test leads because we were tired of fixing blown meters caused by cheap, unsafe equipment. And because we wanted something better for ourselves—and for you.
If you care about your safety, your tools, and doing things right the first time, you’ll appreciate the difference.
âś… Ready to Upgrade?
Explore our best-selling fused leads—trusted by pros across Canada.