A flood sensor apparatus configured to send a signal to a computing device causing the computing device to turn off a utility at a site experiencing a flood. The flood sensor apparatus may include a housing and a back cover which, when coupled together, form gaps along a perimeter of the flood sensor apparatus such that fluid (e.g., water) may quickly fill and drain an interior of the housing. These gaps may be large enough such that the fluid may quickly fill and drain the interior of the housing but small enough that debris may not clog the gap or enter the interior of the housing. The back cover may include a rib extending from an inner face of the back cover and that that runs along a perimeter of the inner face. The rib may prevent tampering of a flood sensor located in the interior of the housing by blocking any object that may be inserted into the gaps.

An improved fluid level sensor includes a radially magnetized magnet integrated into a float, and a Hall sensor adapted to monitor the magnet field emitted from the magnet. This arrangement provides a continuously variable signal across a range of travel, such that a controller receiving the signal can produce precise fluid level measurements and detect operational states of an associated device based on fluid behavior. In addition, the present fluid level sensor is suitable for use in harsh service environments, both because it is physically resilient to fouling, and because the controller is capable of detecting fouling by sensor behavior. In the context of a steam cooker, the present fluid level sensor can also sense low-water, overfill and fouling conditions, while remaining relatively insensitive to food residue, water scale buildup, corrosion and foaming.

Method and apparatus for real-time detection of the level of the cryogenic liquid in a container. The cryogenic liquid level detection apparatus includes a liquid level indicator, a floating scale, and a buoy attached at a bottom end of the floating scale. A top end of the floating scale moves against calibrated markings of the liquid level indicator, thereby indicating the level of the cryogenic liquid in real-time.

Method and apparatus for real-time detection of the level of the cryogenic liquid in a container. The cryogenic liquid level detection apparatus includes a liquid level indicator, a floating scale, and a buoy attached at a bottom end of the floating scale. A top end of the floating scale moves against calibrated markings of the liquid level indicator, thereby indicating the level of the cryogenic liquid in real-time.

A reservoir assembly comprising a lower manifold, an upper manifold, a reservoir body, a float member and a sensor system. The upper manifold has an upper cover placed over a central bore, and sealingly engaged therewith, the upper cover being at least partially transparent. The reservoir body has a lower end sealingly engaged with the lower manifold and the upper end sealingly engaged with the upper manifold. The float member is positioned within the reservoir and can slidably move between the upper and lower manifolds. The float member has an upper target that is substantially parallel to an upper cover positioned on the upper manifold. The sensor system has a float position sensor positioned over the upper cover and targeting the upper target of the float member to, in turn, determine the position of the float member relative to the float position sensor.

A reservoir assembly comprising a lower manifold, an upper manifold, a reservoir body, a float member and a sensor system. The upper manifold has an upper cover placed over a central bore, and sealingly engaged therewith, the upper cover being at least partially transparent. The reservoir body has a lower end sealingly engaged with the lower manifold and the upper end sealingly engaged with the upper manifold. The float member is positioned within the reservoir and can slidably move between the upper and lower manifolds. The float member has an upper target that is substantially parallel to an upper cover positioned on the upper manifold. The sensor system has a float position sensor positioned over the upper cover and targeting the upper target of the float member to, in turn, determine the position of the float member relative to the float position sensor.

A foam-level detector is disclosed. The foam-level detector includes mesh disposed on one or more arms attached to a carrier. The carrier is configured to engage a tube so as to be slidable along the longitudinal axis of the tube. The mesh is configured to engage a foam layer such as to float at or near the surface of the foam. The arms may be pivotally attached to the carrier. The carrier may include a magnet configured to magnetically engage a magnet disposed in the tube. The magnet in the tube may be configured to electrically connect two materials, each material having an electrical resistance per unit length of the material. A measure of the resistance of the conductive path formed by the magnet in the tube and the two materials may be used to infer the position of the foam-float along the tube.

A foam-level detector is disclosed. The foam-level detector includes mesh disposed on one or more arms attached to a carrier. The carrier is configured to engage a tube so as to be slidable along the longitudinal axis of the tube. The mesh is configured to engage a foam layer such as to float at or near the surface of the foam. The arms may be pivotally attached to the carrier. The carrier may include a magnet configured to magnetically engage a magnet disposed in the tube. The magnet in the tube may be configured to electrically connect two materials, each material having an electrical resistance per unit length of the material. A measure of the resistance of the conductive path formed by the magnet in the tube and the two materials may be used to infer the position of the foam-float along the tube.

A fluid tank system comprises a fluid container that includes a sensor opening in a fluid container wall defined by a rim, and a fluid level sensor comprising a radial flange on a proximate end of a longitudinally extending electronics stem that includes a distal end. The distal end of the electronic stem is inserted into the fluid container via the sensor opening and the radial flange seats on the rim. The distal end of the electronics stem is guided via a first radial support and a second radial support to a seat that is located coaxial with the sensor opening, where the first and second radial supports are longitudinally separated and radially spaced apart to allow the electronics stem to longitudinally pass between the first and second radial supports until the flange seats on the rim ensuring that the distal end of the electronic stem is longitudinally positioned adjacent to the seat.

A fluid tank system comprises a fluid container that includes a sensor opening in a fluid container wall defined by a rim, and a fluid level sensor comprising a radial flange on a proximate end of a longitudinally extending electronics stem that includes a distal end. The distal end of the electronic stem is inserted into the fluid container via the sensor opening and the radial flange seats on the rim. The distal end of the electronics stem is guided via a first radial support and a second radial support to a seat that is located coaxial with the sensor opening, where the first and second radial supports are longitudinally separated and radially spaced apart to allow the electronics stem to longitudinally pass between the first and second radial supports until the flange seats on the rim ensuring that the distal end of the electronic stem is longitudinally positioned adjacent to the seat.