Shop Current Sensors

The current sensors we have for sale are the first line of defense for commercial HVAC equipment and heavy machinery. They continuously monitor a motor's electrical draw and instantly alert the Building Automation System (BAS) if the current spikes too high or drops too low. They deliver long-term returns on investment through continuous monitoring that enables early detection of failing components, helping prevent premature equipment breakdowns and saving facilities from emergency repair costs.

Order current sensors online from Blackhawk Supply and choose between solid-core models for new installations or convenient split-core models that snap over existing wires without requiring a system shutdown.

Practical Applications for Current Sensors

Current sensors have many practical applications and use cases, including:

Exhaust and Supply Fan Monitoring

A current sensor will immediately detect if a commercial fan motor snaps a drive belt. When a drive belt snaps, the motor suddenly has no resistance, allowing it to spin easily and drastically reducing electrical draw. The sensor detects a drop in current and signals the BAS that the belt is broken and that no air is moving.

Chilled Water and Boiler Pump Protection

Chilled water and boiler pumps in commercial HVAC systems are designed to handle large volumes of water, providing resistance for the pump's motor. The main issues with these water pumps are blocked flow and downstream valve closure, where the pump pushes water against a closed wall, creating extreme pressure. If a valve accidentally closes upstream or a pipe leaks, it's called dry-running, which can cause the motor to overheat and burn out.

A current sensor detects the spike in electrical strain from a blocked pipe or the sudden drop in current from a dry run, shutting the pump down before the motor burns out or the seals melt.

Variable Frequency Drive (VFD) Integration

Integrating an analog current sensor with a VFD provides the building's automation system with a continuous, highly accurate view of the power a variable-speed motor consumes. This ensures false alarms aren't triggered when the motor slows down and allows facility managers to precisely track and optimize their energy savings.

Lighting and Electrical Panel Audits

You use our split-core sensors on main electrical feeds to monitor total energy consumption, helping facility managers easily identify unnecessary power draws and plan to reduce monthly utility bills.

Secure Your Current Sensors Today

Adding reliable current sensors to an HVAC system transforms a reactive maintenance routine into a proactive, money-saving strategy. Browse our catalog to find and buy current sensors with the correct amperage range, output signal and core style you require for your specific control panel electrical work.