The Microdot coaxial interface, developed for aerospace and instrumentation applications, is a small circular connector, which is sometimes mistaken for the slightly larger SMA coaxial connection. In its most common configuration, the S-50 searies (the vacuum microdot feedthroughs offered on this site), it uses a No. 10-32 UNF (.190-32) thread. Male connectors are fitted with a 0.030/.033 diameter pin and jacks have the female mating socket receptacle. It is commonly used in conjunction with high-frequency, low noise, 50-Ohm instrumentation signal lines in accelerometers and various transducer applications.
Microdot Feedthrough Construction
Accu-Glass Products' Microdot and "between-series" BNC-Microdot coaxial feedthroughs are constructed with grounded shields, where the feedthrough shield and flange are electrically common.
Microdot-BNC feedthroughs offer a simple means of transitioning between BNC and Microdot wired applications, or vise versa. The BNC-Microdot feedthrough is often used in conjunction with crystal sensors to monitor deposition thicknesses of in-vacuum coating applications. Microdot cable assemblies, connectors, and wiring accessories are also offered on this site.