Automotive Open Loop Hall Effect Current Sensor

Piher Sensing Systems’ HCSO-1W family of open-loop current sensors generates a ratiometric analog output voltage signal proportional to the current flowing through the conductor. Based on Hall effect technology, the sensor is designed for precise measurement of AC and DC currents in automotive battery management and engine control applications, providing higher efficiency and lower energy loss.

■ Open-loop current sensor based on Hall effect
■ Dual-channel sensor for high and low currents (two ranges)
■ Flange, cable/wire mounting
■ Simple or redundant analog ratiometric output
■ Galvanic isolation between power supply and control
■ Measured current range from ±25 A to ±1000 A
■ Non-invasive technology
■ Operating temperature from -40°C to +125°C


Accurate, non-intrusive measurement of currents with galvanic separation between power and control
Maintains precision from -40°C to 125°C
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Designed to cope with external magnetic interferences.


Parameter Unit
Supply voltage 5 V ±10%
Current consumption Typ. 26 mA
analog output 0.5 V to 4.5 V
Overvoltage protection +10 V