Rotary sensors measure angle up to 100 turns

NOVOTECHNIK ML Series of rotary sensors measure angle up to 100 turns or 36,000-degrees of mechanical travel and have a life of over 15-million turns. Product series includes five models each optimized for their maximum 6, 10, 25, 50 or 100 turns. Repeatability is to ±0.01% or better and independent linearity is as low as ±0.25%. Electrical ranges for the models are 0 to 2,160-degrees, 3,240, 8,280, 17,280 or 34,560-degrees. Maximum resistance value is either 5k? or 10k?, depending on model and temperature coefficient is a very low 5ppm/K.

http://www.novotechnik.com/ml