MRI-compatible rotary encoder comes with 13-bit resolution and 12-bit multi-turn tracking
The all-optical, non-metallic MR338 passive sensor provides precision absolute angular measurement from 0° to 360° with 13-bit (8192 count) resolution and 12-bit multi-turn tracking . A duplex multimode fibre optic link connects the passive MR338 Sensor to the active MR330 controller module installed outside the MRI area. This absolute encoder system is designed for use in functional-MRI research, MRI training phantoms, EMC test facilities and other challenging electromagnetic environments where EMF and RF transparency is required.
The controller transmits a burst of light to the code disk in the sensor which accurately modulates the spectral components of the light based on angular position. The position information is imprinted in the optical spectrum of the light and guided back to the controller for the position readout. The sensor requires no electrical power and houses no electronic components whatsoever. The controller’s built-in interfaces include SSI, USB, RS485, RS232, Modbus RTU, programmable digital set points and analog outputs (4-20mA and ±10V). The DIN-rail mount module operates from 24 VDC and supports encoder links extending up to 2500 meters.
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