The BNC-Microdot / Crystal Sensor Feedthrough is a between series coaxial connector designed to transition between BNC and microdot interfaces within a vacuum system. This configuration is widely used in vacuum coating deposition monitors to measure coating thickness on various substrates.

The air-side features a bayonet-style, threadless BNC connection, while the vacuum-side provides a compact, threaded microdot interface. Each unit includes a noise shield for clean instrumentation transmission and is compatible with in-vacuum cable assemblies. MDC offers three standard mounting options—Conflat, Kwik-Flange™, and Weldable—and can provide custom configurations upon request.

Industry Applications

BNC-Microdot / Crystal Sensor Feedthroughs are primarily used in vacuum coating systems for thin film deposition monitoring. They are an essential component in crystal sensor-based deposition monitors used to measure coating thickness in industries such as optics manufacturing, semiconductors, research laboratories, and aerospace coating facilities. Their between series coaxial design ensures compatibility with industry-standard instrumentation setups.