The Vacuum Gauge Stopcock is required whenever a high vacuum gauge is used. A standard ⅛” NPT vacuum gauge tube (sensor) connects to the stopcock assembly with a proprietary Threaded Glass Compression O-Ring Connector, making a high vacuum connection. The stopcock allows the vacuum gauge tube to be isolated from the manifold while bombarding, as well as protecting the gauge tube from the influx of debris and contaminants, which are a normal result of the processing procedure.

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