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Vishay / Sfernice 40 LHE Linear Position Sensor

Vishay / Sfernice 40 LHE Linear Position Sensor is a compact, high-performance device designed for precise linear displacement measurement in demanding environments. Utilizing non-contact Hall effect technology, the Vishay / Sfernice 40 LHE offers excellent durability and reliability with a long operational life, even in harsh conditions. The sensor features a stroke length of up to 40mm, high linearity (±1%), and repeatability, making it ideal for applications requiring accurate position feedback. A robust construction includes an IP67-rated housing, ensuring protection against dust and water ingress. Commonly used in industrial automation, medical equipment, aerospace, and automotive systems, the 40 LHE sensor is well-suited for tasks such as actuator position monitoring, robotic control, and motion tracking in precision instruments.

Features

  • Accurate linearity down to ±1%
  • Absolute position
  • Electrical strokes from 0mm to 40mm
  • Long life, greater than 10M cycles
  • Non-contacting Hall effect technology
  • Model dedicated to all applications in harsh environments
  • Versatile “2 faces” mounting
  • Optional spring return
  • Lead-free and RoHS-compliant

Applications

  • Industrial automation
    • Position feedback in actuators and robotic arms
    • Monitoring linear motion in automated machinery
  • Medical equipment
    • Precise control of movement in diagnostic and therapeutic devices
    • Position sensing in patient beds or imaging systems
  • Aerospace and defense
    • Control surface position feedback
    • Monitoring actuator positions in aircraft systems
  • Automotive
    • Throttle or pedal position sensing
    • Suspension and steering system feedback
  • Test and measurement systems
    • Calibration and precision measurement setups
    • Linear displacement tracking in lab instruments
  • Renewable energy - position tracking in solar panel alignment systems

Specifications

  • 35mm x 14.5mm x 28mm size
  • Up to 40mm electrical stroke
  • Independent linearity
    • Analog output - ±1% (at VMAX = 0.5m/s) / ±2% (at VMAX = 1m/s)
    • PWM output - ±1% (at VMAX = 0.4m/s) / ±2% (at VMAX = 0.8m/s)
  • 12μm resolution (40mm stroke)
  • 5VDC ±10% supply voltage
  • <16mA typical supply current
  • Analog ratiometric (10% to 90% of VSUPPLY) or PWM (1kHz - 10% to 90% of duty cycle) output signal
  • +20VDC over-voltage protection (input)
  • -10VDC reverse voltage protection (input)
  • +10VDC output over-voltage protection (+14VDC peak - 200s at +25°C)
  • 1kΩ minimum load resistance for analog output and PWM output
  • 0.1% static hysteresis of VSUPPLY
  • <15ms start-up cycle
  • 42mm maximum mechanical travel
  • Sleeve bearing type
  • “2 faces” mounting (drilled flange - 2x2 holes for 2x M3 screws) + M5 at the end of the shaft (threaded option only)
  • 0.2N maximum actuation force (spring option - from 1.3N to 7N typical along stroke)

Dimensions: mm

Mechanical Drawing - Vishay / Sfernice 40 LHE Linear Position Sensor
Published: 2025-08-05 | Updated: 2025-08-22