We Calibrate Thousands of Instruments a Year
In-house experts. Fast turnaround. Trusted since 1968.
Fused Test Leads: Built for Safety
Cold-weather flexible. German made fuses. Technician-trusted.
Dielectric Strength Testers
Rugged, reliable, and calibrated by the same experts who use them.
Current Transformers
CSA Approved, Class 1 Accuracy Precision-engineered. Ready to ship. OEM pricing available.
Why Buy from Duncan Instruments?
We’ve been Canada’s trusted source for electrical test equipment
since 1968.
But we’re more than just a supplier
we calibrate and service the same gear we sell.
That means you get reliable products, expert support, and no surprises.
We don’t just ship boxes. We stand behind what’s inside.
Recognized by Google
We’re proud to be recognized by Google as a Top Quality Store — based on customer satisfaction, accurate shipping, and reliable service.
Featured products
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2132IN – 1000V Analog Insulation Resistance Tester
Regular price $ 189.00 CADRegular price$ 245.00 CADSale price $ 189.00 CADSale -
8052-IN 1000V Analog Insulation Tester
Regular price $ 189.00 CADRegular price$ 245.00 CADSale price $ 189.00 CADSale -
AEMC 1015 Compact Insulation Resistance Tester – 250V, 500V, 1000V
Regular price $ 1,228.61 CADRegular price$ 1,365.00 CADSale price $ 1,228.61 CADSale -
AEMC 2135.36 Ground Test Kit for 4-Point Testing, 300 ft
Regular price $ 1,161.58 CADRegular price$ 846.67 CADSale price $ 1,161.58 CAD -
AEMC 2135.37 Ground Test Kit for 4-Point Testing, 500 ft
Regular price $ 1,346.80 CADRegular price$ 1,060.00 CADSale price $ 1,346.80 CAD -
AEMC 2135.38 Ground Test Kit for 3-Point Testing, 100 ft
Regular price $ 433.06 CADRegular price$ 360.00 CADSale price $ 433.06 CAD -
AEMC 4620 Digital Ground Resistance Tester 2000Ω
Regular price From $ 1,750.74 CADRegular priceSale price From $ 1,750.74 CAD -
AEMC 4630 Digital Ground Resistance Tester – Rechargeable 4-Point Tester with Extended Range to 2000Ω
Regular price $ 2,605.40 CADRegular price$ 2,052.00 CADSale price $ 2,605.40 CAD
Tools & Tips for Technicians
View all-
Current Transformer Selection Made Easy – A Pro...
Need a CT fast? This guide makes it easy to select the right current transformer for your project. We break down CT ratio, window size, mounting style, and accuracy —...
Current Transformer Selection Made Easy – A Pro...
Need a CT fast? This guide makes it easy to select the right current transformer for your project. We break down CT ratio, window size, mounting style, and accuracy —...
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Understanding Precision Power Analyzers: A Guid...
Power analyzers are essential tools for engineers and metrologists working with high-precision systems. Learn what to look for and why Infratek sets the standard.
Understanding Precision Power Analyzers: A Guid...
Power analyzers are essential tools for engineers and metrologists working with high-precision systems. Learn what to look for and why Infratek sets the standard.
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🧠 How to Choose the Right Universal Programmer:...
🧠 How to Choose the Right Universal Programmer: FAQ from Duncan Instruments Whether you’re working on automotive electronics, industrial equipment, or lab prototypes, selecting the right universal programmer can make...
🧠 How to Choose the Right Universal Programmer:...
🧠 How to Choose the Right Universal Programmer: FAQ from Duncan Instruments Whether you’re working on automotive electronics, industrial equipment, or lab prototypes, selecting the right universal programmer can make...


