Abstract: A fill control system and method are provided. The system may include valves connecting a cryogen vessel to a cryogen manifold. The system may detect a cooling of the cryogen manifold caused by filling of another cryogen vessel with cryogen, and responsively initiate its own filling process. Thus, a number and duration of venting instances is reduced. Before filling a cryogen vessel with cryogen, a fill control system may vent filling lines and/or a cryogen manifold to limit introduction of warm fluid into a cryogen vessel. By determining when another fill control system has already initiated venting of the cryogen manifold (indicated by cooling of the cryogen manifold as cryogen flows), a fill control system reduces the amount of venting that it must perform prior to filling its associated cryogen vessel from the cryogen manifold.

Abstract: Cryogenic storage turn trays may be provided having a variety of sensors. The storage turn trays can have a sample storage area, a gear assembly, a shaft assembly, and a sensor assembly. The sensor assembly can be configured to measure movement of a sample storage area to determine a position of the sample storage area. Various indicators, displays, and/or annunciators may communicate the position of the sample storage area to a user.