| 摘要 |
<p>A two-way valve has a proximity switch attached detachably to the outside of a bonnet. A metallic detection member is connected to an end of a rod which is displaced in unison with a diaphragm for opening and closing a fluid passage in the two-way valve. The proximity switch detects the metallic detection member for detecting whether said two-way valve is in the ON state where the fluid passage is opened or the two-way valve is in the OFF state where the fluid passage is closed.</p> |
