Optical Encoder vs. Resolver
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• What is Optical Encoder ?
• What is Resolver Encoder ?

This decision is primarily based on the operating environment. The environmental integrity of a brushless resolver is unchallenged. Being simple rotary transformers, the resolvers can take much more abuse than optical encoders and exhibit no significant wear or aging. Especially, if the operating tem-perature is below freezing or above 150 F, there is no other choice, but to go for resolvers. Operating temperature range of resolvers is typically between -67 F to +248 F.

In extremely hostile environment such as continuous mechanical shock and vibrations, humidity, oil mist, coolants and solvents, resolver is the best choice.