Posirot is the name of a new family of high-resolution magnetic angular positions sensors developed by ASM.
The first model in this range is the PMIS4/PMIR4 magnetic incremental angular sensor with a resolution of up to 184,320 increments and a quad output like optical encoders.
The high-precision incremental, contact-free encoder system consists of a PMIS4 sensor reading head and a PMIR4 magnetic code wheel that is magnetised with alternating magnetic poles; the sensor head generates a quadrature output A/A'/B/B'.
The system covers an angle range of 0 to 360 degrees with no gap or overlap, making it suitable for high-speed and rapid acceleration applications up to 6000rpm. An optimal index mark Z/Z' is also available.
A Faraday-cage metal housing on the PMIS4 sensor head results in outstanding protection against electromagnetic disturbances and aids heat dissipation. Protection class is up to IP69K. Due to the Posirot's innovative magnetic coding, the sensor is highly resistant to shock, vibration, humidity, oil and dust, which makes it well suited to applications in extremely hostile industrial environments.
PMIR4 magnetic wheels are available with decade, binary or degree scalings and reach up to 102,400 pulses/turn, 131,072 pulses/turn or 184,320 pulses/turn, respectively. The working temperature range covers -40 to +85 degrees C.
For more information, visit www.asm-sensor.co.uk
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