REMOTELY READABLE VALVE POSITION INDICATORS

摘要

Remotely readable valve position indicators and related methods are described. An example valve position indicator includes a wireless identifier device (116) coupled to a valve stem (114) or shaft to move with the valve stem or shaft. The wireless identifier device is to convey information indicative of the position of the valve stem or shaft to a remote wireless electronic reader. The example valve position indicator also includes a shielding body (130) to prevent the wireless identifier device (116) from conveying the information to the remote wireless electronic reader when the valve stem or shaft is in a first position and to permit the wireless identifier device to convey the information to the remote wireless electronic reader when the valve stem or shaft is in a second position.