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291 Series Optical Encoder

CTS offers the 291 series, a precision, long-life compact, 12-mm-size optical encoder


The 291 Series from CTS allows versatility in design applications by providing highly reliable, precise digital output and long rotational life with a non-contacting design. This product provides flexibility for resolution, power consumption, operating temperatures, and use in multiple environments. The optional momentary switch provides additional functions such as menu selection for digital displays.

The 291 Series is ideal for many applications which include, but are not limited to, the following: medical equipment, laboratory equipment, communication, industrial, HVAC, transportation, security, and professional and consumer audio and home entertainment equipment.
CTS's 291 Series Optical Encoder

Features Benefits
12 mm, low-profile package (12 x 14 x 7 mm) is one of the smallest optical encoders available in the market today Precise digital signal output in a compact size
3 million cycle life with no detent or 1 million cycles with detents Long life, accuracy, and reliability
Optional Long Life momentary switch (1 million life cycles) Momentary switch can be used for reliable menu selection in digital displays
Durable metal shaft and bushing Reliability
6 and 8 PPR resolution in a 2-bit Quadrature output Variety of output options offer greater design flexibility
5 VDC or 3.3 VDC option Provides the user with low power consumption options
Dust-resistant IP50 construction
Humidity resistant (96 hours at 90% - 95% RH)
Design flexibility for challenging environments
PC terminal or cable and connector options Flexible design options
RoHS compliant Design for environmental awareness

Digi-Key P/N Manufacturer P/N Description  
CT3041-ND 291C6022F624AB ENCODER OPT RIBBON CBL 6PPR W/SW Datasheet
CT3042-ND 291V1022F624AB ENCODER OPT ROTARY 6PPR W/SW
CT3043-ND 291C6022F832AB ENCODER OPT RIBBON CBL 8PPR W/SW
CT3044-ND 291V1022F832AB ENCODER OPT ROTARY 8PPR W/SW