This is the base for a device to measure anal contractions in men and women. A pressurized tube is inserted in the hole under the corona, wrapped around the recessed shaft, and leads to an MPXV7002DP differential pressure sensor board. This design follows an early Bohlen & Held (1979) design. The print is provided here to make it fully accessible to sexual physiologists for future research on orgasm features. The design, with additional details, has been submitted for publication in a peer-reviewed journal as:
Prause, Nicole & Arnold, Rudolf. (2019). Anal pneumatics: Tool for the verification of orgasm contractions across genders. Submitted for Publication.