The 87 Series Ratio Relay Volume Boosters are used to amplify pressure or for remote pressure control - perfect for cylinder actuation or clutch and brake control.
在87系列增压器体积比继电器用于放大压力或远程压力控制-气缸驱动或离合器和制动器控制完善。
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This paper introduces the autocontrolling system composed with proximity sensor and PLC, this system is instead of relay controlling complicated system to realize cylinder changing automatically.
However, very soon the disk was replaced by inverted cup, i. e. hollow cylinder and the new relay obtained was known as an induction cup or induction cylinderrelay.