Circuit Sensors

Precision Current Transformers for Solar, EV, and Industrial Monitoring

Circuit Sensors designs and manufactures high-accuracy current transformers for solar, EV, industrial, and SCADA applications. Our CircuitFlow™ series delivers reliable, clean signal output and is trusted by professionals across North America.

Browse our Sensors

Canadian-Owned & Operated

Engineered in Canada and supported by real people who understand your systems.

Commercial-Grade Accuracy

All CTs are built for precision with tight accuracy tolerances and robust shielding.

Plug & Play Compatibility

Our CTs work with industry-leading platforms like APSystems, Sol-Ark, FlexSCADA and more.

Trusted for Performance

Every CircuitFlow CT is engineered for precise, real-world applications.

Precision Power Monitoring. Canadian Engineered.

CircuitFlow™ 200A CT (200A / 66.6mA Output)

Direct replacement for the APsystems 200A CT (18083020012), the CircuitFlow™ 200A Current Transformer offers 66.6mA output with high accuracy and seamless compatibility. Ideal for QS1, YC600, and QT2 solar monitoring systems.

View Product

Where to Buy

CircuitFlow™ 225A CT (225A / 0.333V Output)

Direct replacement for the SolarEdge 225A CT (SECT-SPL-225A-T-20). The CircuitFlow™ 225A Slim Current Transformer delivers accurate 0.333Vac output in a compact, split-core design compatible with SolarEdge consumption monitoring systems.

View Product

Where to Buy

CircuitFlow™ 80A CT (80A / 26.6mA Output)

Direct replacement for APsystems 80A Current Transformer (18083020112). The CircuitFlow™ 80A CT delivers 26.6mA output with split-core convenience and precise compatibility for residential solar monitoring systems.

View Product

Where to Buy