Micronor

MR348 MRI-Safe Rotary Incremental Encoder

Part no.: MR348 MRI-Safe Rotary Incremental Encoder

Key Features

• 100% passive sensing design – no electronics whatsoever

• Up to 1.25" through hollow design

• Sensor can be installed in all manner of hazardous locations and potentially explosive atmospheres

• Immune to EMI and RFI

The MR348 series Fiber Optic Incremental Sensor is an entirely passive, non-metallic incremental rotary encoder designed for use in Magnetic Resonance Imaging (MRI), functional MRI (fMRI), nanomagnetic detection, EMC test labs, and similar applications where immunity and transparency to electromagnetic fields is required.

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With the increasing sophistication of electronic controls for mechanical systems, there is more demand for durable, accurate and easy to use displacement sensors. As automation becomes more common there is also an increasing sensitivity to price. Customers also want sensors that can be easily connected and mechanically integrated.

Fiber Optics Encoders

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Accuracy, Resolution and Repeatability

There are several key terms that are critical to specifying the optimal position sensor for a given application. This application note defines these key terms and how they relate to the sensor’s role in the overall system performance. It is important to consider that precision is very much a system issue and can be dominated by mechanical errors such as eccentricity. This paper discusses the most significant mechanical error for rotary applications (eccentricity) and presents eccentricity tolerant position sensor solutions.

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