A system for detecting radiation events in a ring laser gyro is provided. Electrodes are positioned to establish an electric field in the space between the two substrates. The rear door defines a sealing surface that is engaged by the portion of the front door seal extending over the adaptor. In other embodiments, the anti-splash device can attach to the brim of a cup or to a lid. It is emphasized that this abstract is provided to comply with rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.