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.

Abstract: A security device includes: a substrate having a reflective surface; and a printed array of elements on a substantially flat area of the substrate. Each element is formed of a first material which is at least semi-transparent and a second material, the materials having different optical characteristics. Each element has a raised surface profile relative to the substrate including at least first and second sides sloping from the top of the element to at least respective edges of the element, at which the sides meet a substantially flat base surface of the element parallel to the substrate. The sides have different orientations and each lie at an acute angle to the substrate normal. Under illumination away from the substrate normal, when viewed from first and second viewing angles the element appears to have respectively substantially the optical characteristics of the first and second materials.