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MEMS and Sensors

Digital Magnetic Switch Monitors Current on a Wire or the PCB for IoT Applications

27 June 2017

Crocus Technology has introduced a new digital magnetic switch that detects the magnetic field as generated by a permanent magnet or induced by a current-carrying conductor.

The CT832 switch monitors the current on a wire or the PCB trace used with many Internet of Things (IoT) applications, appliances and industrial automation environments. About the size of a typical shunt resistor, the device replaces it but also adds intelligence with enhanced switching and current monitoring capability, Crocus says.

The device provides both a digital analog output that serves multiple applications from a single switch with low power consumption. When configured solely with a digital output, the switch consumes only 200nA.

When used as a proximity switch, it detects window or door movement in intrusion alarm systems or appliances, while the analog output adds another dimension by sensing if a window or door is left open with proximity detection capability. In smart meters, the switch acts as a safeguard against tampering by allowing the analog output to detect specific magnetic field signatures of the application.

Crocus is showcasing the new CT832 switch at this week’s Sensor Expo in San Jose, California.

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