A low power consumption leak detection device for a toilet tank includes a water level switch disposed within the toilet tank having a float. The float moves with a water level within the toilet tank from a starting position to a lower position. An electronic circuit is configured to be electrically disconnected from a power source when the float is in the starting position. The electronic circuit is configured to be electrically connected to the power source when the float is in the lower position and activate a timer having a preset time limit, which if reached sends an alarm signal to an alarm indicator. The alarm indicator notifies a resident of a potential water leak problem that can be fixed. The lower power consumption leak detection device only uses power when the water level drops thereby greatly extending the life of the battery and usefulness of the device.

A low power consumption leak detection device for a toilet tank includes a water level switch disposed within the toilet tank having a float. The float moves with a water level within the toilet tank from a starting position to a lower position. An electronic circuit is configured to be electrically disconnected from a power source when the float is in the starting position. The electronic circuit is configured to be electrically connected to the power source when the float is in the lower position and activate a timer having a preset time limit, which if reached sends an alarm signal to an alarm indicator. The alarm indicator notifies a resident of a potential water leak problem that can be fixed. The lower power consumption leak detection device only uses power when the water level drops thereby greatly extending the life of the battery and usefulness of the device.

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.

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.

A low power consumption leak detection device for a toilet tank includes a water level switch disposed within the toilet tank having a float. The float moves with a water level within the toilet tank from a starting position to a lower position. An electronic circuit is configured to be electrically disconnected from a power source when the float is in the starting position. The electronic circuit is configured to be electrically connected to the power source when the float is in the lower position and activate a timer having a preset time limit, which if reached sends an alarm signal to an alarm indicator. The alarm indicator notifies a resident of a potential water leak problem that can be fixed. The lower power consumption leak detection device only uses power when the water level drops thereby greatly extending the life of the battery and usefulness of the device.

A low power consumption leak detection device for a toilet tank includes a water level switch disposed within the toilet tank having a float. The float moves with a water level within the toilet tank from a starting position to a lower position. An electronic circuit is configured to be electrically disconnected from a power source when the float is in the starting position. The electronic circuit is configured to be electrically connected to the power source when the float is in the lower position and activate a timer having a preset time limit, which if reached sends an alarm signal to an alarm indicator. The alarm indicator notifies a resident of a potential water leak problem that can be fixed. The lower power consumption leak detection device only uses power when the water level drops thereby greatly extending the life of the battery and usefulness of the device.

A low power consumption fluid leak or overflow detection device for a fluid tank includes a fluid level switch disposed within the tank having a float. The float moves with a fluid level within the tank from a starting position to a second position. An electronic circuit is configured to be electrically disconnected from a power source when the float is in the starting position. The electronic circuit is configured to be electrically connected to the power source when the float is in the second position and activate a timer having a preset time limit, which if reached sends an alarm signal to an alarm indicator. The alarm indicator notifies a resident of a potential problem that can be fixed. The low power consumption leak or overflow detection device only uses power when the fluid level drops or rises thereby greatly extending the life of the battery.

A low power consumption fluid leak or overflow detection device for a fluid tank includes a fluid level switch disposed within the tank having a float. The float moves with a fluid level within the tank from a starting position to a second position. An electronic circuit is configured to be electrically disconnected from a power source when the float is in the starting position. The electronic circuit is configured to be electrically connected to the power source when the float is in the second position and activate a timer having a preset time limit, which if reached sends an alarm signal to an alarm indicator. The alarm indicator notifies a resident of a potential problem that can be fixed. The low power consumption leak or overflow detection device only uses power when the fluid level drops or rises thereby greatly extending the life of the battery.

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.