It combines precise displacement tracking, rugged operation, and cost efficiency for industrial automation, transportation, renewable energy, and heavy-duty motion control applications.
Vishay Intertechnology has expanded its position sensing portfolio with the Vishay Sfernice 34 PHE multi-turn absolute position sensor, a compact Hall-effect-based device designed to deliver precise displacement measurement, long operational life, and reliable performance in demanding industrial environments. The 10-turn sensor combines high accuracy with significantly lower cost, making it suitable for motion control systems that require dependable position feedback.
The key features are:
- 5 VDC ±10% supply voltage with <8.5 mA typical current consumption
- Recommended 1 kΩ load resistance for analog and PWM outputs
- Available with single or dual analog ratiometric and PWM outputs
- Integrated locating peg prevents sensor rotation during installation
- RoHS-compliant design with 14-week production lead time
Built around non-contact Hall-effect technology, the 34 PHE provides absolute position sensing over a total electrical angle of 3600° across 10 turns. It achieves linearity down to ±1% of full stroke with a 1° resolution, while eliminating mechanical wear associated with contact-based sensing technologies. The sensor is rated for more than 10 million operating cycles, supporting long-term deployment in continuous-duty applications.
The device is intended for a broad range of industrial and transportation applications, including servo-loop motion control systems, industrial motor and actuator displacement monitoring, solar panel tracking systems, flow control valve positioning, and throttle or pedal position sensing in agricultural equipment, railway systems, and marine platforms. By offering approximately 40% lower cost than previous-generation solutions, it enables equipment manufacturers to improve positioning performance while reducing overall system costs.
Designed for operation in harsh environments, the sensor features IP65 sealing and withstands vibrations up to 20 g and shocks up to 50 g. Integrated reverse-voltage and overvoltage protection eliminates the need for additional external protection circuitry, simplifying system design and lowering component count.
The 34 PHE also supports enhanced functional safety through an optional dual-output architecture, where two independently tracked outputs operate in opposite directions to facilitate fault detection. As a true power-on absolute sensor, it instantly reports its position after power is restored without recalibration, homing, or battery backup, reducing maintenance requirements and improving system availability in mission-critical applications.
