The AMOSIN^® angle measuring systems are open hollow-shaft measuring systems, and generally therefore do not have their own bearings, nor do they require any couplings for mechanical connection.
Operating entirely on an inductive basis, the AMOSIN^® systems achieve high precision figures as close as +/- 5 μm arc length, but are nevertheless very well able to resist environmental influences (IP 67) such as dust, humidity and so forth, and also feature extremely high resistance to shock and vibration.
The high precision is mainly due to the procedure used to manufacture the rigid steel measuring ring, and to the exceptionally high quality sensor signal, with deviations in the sine wave down to < 0.1 % harmonic content, as a measure of the achievable interpolation precision within the grating pitch. There are many head ring configurations: Classic ring at the end of the cylinder; Thin ring that fits on the cylinder circumference outside or inside the cylinder; No wring configuration where the head reads gratings etched directly on the cylinder; Theta Zeta configuration where ONE head can read and give a position for the circumference and the length of the cylinder. With special machining on the customer parts, AMO offers to integrate the scale directly on your part to make the system simpler. 

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