Bourns EMS22 Non-Contacting Magnetic Rotary Encoders

Bourns EMS22 are non-contacting rotary magnetic encoders with a Hall Effect application-specific standard product (ASSP) capable of producing four distinct output waveforms. These waveforms include 2-bit quadrature up to 256 Pulses per Revolution (PPR), Step/Direction up to 512 PPR, Pulse-Width Modulated (PWM) output with 1024 positions, and Absolute with 1024 positions. Model EMS22 is available in both a 3.3VDC and 5VDC supply voltage and is offered in two different versions. These encoders have the capability of rotating up to 10,000RPM while maintaining code accuracy, making them suitable for MMI applications such as industrial automation. This performance is achieved by utilizing dual ball bearings in the construction of each device, resulting in extended rotational life up to 100,000,000 shaft revolutions. The EMS22 non-contacting encoders are ideal for use in harsh environments where extreme levels of temperature, moisture, and particles are present. Their outstanding performance is attributed to the non-contacting technology and superior performance of the AS5040 Hall Effect ASSP. These encoders are sealed to IP65 (ingression protection) with an optional upgrade to IP67.


  • Bushing or servo mount
  • Non-contacting magnetic technology
  • Small size
  • CMOS and TTL compatible
  • Long life
  • High operating speed
  • Highly repeatable
  • Sealed option
  • Daisy-chain configuration or chip-select option
  • -40°C to +125°C temperature range


  • Audio mixer and broadcasting equipment
  • Brushless DC motors
  • Car audio and navigation
  • Cursor position sensing in oscilloscopes
  • Food processing and packaging
  • Forklifts and material handling equipment
  • Gas pedal position sensing
  • Headlight position controls

Output Signal Generation

Chart - Bourns EMS22 Non-Contacting Magnetic Rotary Encoders
Published: 2012-07-18 | Updated: 2022-03-11