Bearing device with a sensor

A bearing device with a sensor, comprising:

• a bearing part including an outer member having a raceway defined in an inner periphery thereof;
• an inner member having a raceway confronting the raceway in the outer member;
• rolling elements interposed between those raceways;
• a revolution sensor part including an encoder, fitted to one end of the inner member;
• a sensor fitted to one end of the outer member in face-to-face relation with the encoder;
• and
• a sensor mounting member,
• wherein the sensor mounting member comprises
• a mounting tube part mountable on an outer diametric surface of the outer member,
• a side plate part axially positioned in contact with an end face of the outer member,
• the side plate part of the sensor mounting member includes inner and outer opposite plate portions confronting axially with each other, and
• the sensor is sandwiched between the inner and outer opposite plate portions,
• wherein the side plate part of the sensor mounting member has its entire circumference provided with the inner and outer opposite plate portions.