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About product and suppliers:
        Alibaba.com offers 442 4mm shaft encoder products. About 60% of these are sensors. 

A wide variety of 4mm shaft encoder options are available to you, such as speed sensor, position sensor. You can also choose from optical sensor, current sensor, and hall sensor. As well as from digital sensor, analog sensor, and switching transducer. And whether 4mm shaft encoder is free samples. 

There are 442 4mm shaft encoder suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 4mm shaft encoder respectively. 

mm shaft encoder products are most popular in North America, Southeast Asia, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 442 with Other, 246 with ISO9001, and 8 with ISO14001 certification.