Abstract: A tank includes an interior magnetic float assembly for detecting a liquid level in the tank, and an exterior gauge component attached to a gauge head of the tank for detecting and indicating the liquid level of the tank based on a rotational orientation of a tank magnet of the magnetic float assembly. An adapter plate mounts a housing base of the exterior gauge component to the gauge head. The adapter plate is secured to the housing base and snaps onto the gauge head. A portion of the base defined by a first molded piece extends within an opening of the adapter plate and a second molded piece of the base extends from the opening away from the housing to define a proximal end portion of the housing disposed proximate the tank magnet. Alternatively, the base receives a threaded adapter for mounting to a threaded opening of a gauge head.

Abstract: An exterior gauge component is used to indicate a tank liquid level based on a rotational orientation of a tank magnet at a gauge head. The exterior gauge component includes a multi-track rotary encoder wheel and an optical sensor configured for reading an output of the multi-track rotary encoder wheel. The multi-track rotary encoder wheel is configured to rotate with rotation of the tank magnet such that specific ranges of rotational orientation of the tank magnet each corresponds to a specific output of the multi-track rotary encoder wheel. Each track represents a binary bit of the output read by the optical sensor. An adapter plate mounts a housing of the exterior gauge component to the gauge head and has an opening therethrough. A proximal end portion of the housing including magnets extends through the opening, and is detachable from the housing and attachable to a threaded adapter for mounting to a threaded opening of a tank.

Abstract: A heat-in package with doneness indicator for heating applications, such as microwave heating of foods or sterilization applications. The doneness indicator comprises indicia printed with thermochromatic ink on the heat-in packaging. The doneness indicator can be sealed from front to back on the heat-in packaging in such a way that the heat transfer to the sealed area is controlled so that the contents contained within the heat-in packaging has adequate time to heat before a color change or other visual transformation is observed in the doneness indicator. Furthermore, the sealed area containing the thermochromatic ink is not in direct contact with the contents within the packaging. The ink changes due to heat conduction through the film. A venting system can further be incorporated to prevent excessive pressure build-up within the packaging.