An encoder is a device used to sense position or orientation for active feedback and position control. There are two primary types of encoders: rotary encoders and linear encoders. Both detect and convert position into an electronic signal.

Rotary encoders convert the angular position or motion of a shaft into an electronic signal. These encoders are specifically designed for applications that require precise rates of rotation. Linear encoders are paired with a scale to encode position along a linear path. These encoders are widely used in applications that require accurate, high-speed movement along a fixed path.

Both encoders can either be absolute or incremental. Absolute encoders maintain absolute position even when removed from a power source and do not have a “home” position. Linear encoders, alternatively, require a reference point to report position at certain intervals. Both provide the same accuracy, but absolute encoders are more resistant to power or signal loss.

H25 Series Image
  • Single or Dual Channel Output, Complementary and Indexed Outputs Available
  • Square Flange or Servo Mount
  • 3/8 Shaft
  • IP66 with Shaft Seal
  • Resolution up to 5,000 Cycles per Turn
The H25 is the flagship of the BEI Sensors product line. It was designed from the ground up for the industrial marketplace. The H25 offers features such as EMI shielding, 40 lb. ABEC 7 bearings, matched thermal coefficients on critical components, and custom high efficiency optics. The encoder meets NEMA 4 and 13 requirements when ordered with the shaft seal. Typical applications include machine control, process control, the wood processing industry, oil well logging, industrial weighing, agricultural machinery, textile equipment, web process control, robotics, and food processing.
M Series Image
  • Multiple TTL Output Resolutions or Sinusoidal Signal
  • Distance Coded Models Provide Semi-Absolute Measurement
  • Measuring Lengths from 40 mm to 1540 mm
  • Measuring Resolution as Fine as 0.1 m
  • Withstands Vibrations up to 3g
The M series is designed for applications on standard machines with travels up to 1540 mm. With reference marks every 50 mm or distance-coded and detachable cable connector built into the reader head (except the MK series where the reader head comes standard with a 3-meter attached cable).
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