There is described an apparatus for determining a level of a liquid to be contained in a container, comprising: a body extending along a longitudinal axis, the body being insertable within the container; and a level sensor unit secured to the body for detecting the level of the liquid along the longitudinal axis of the body.

A method for handling a fluid includes separating the fluid into a liquid and a vapor within a container such that at least a portion of the vapor is disposed above the liquid, detecting a level of the liquid in the container, and actuating at least one valve to exhaust the vapor from the container to maintain the level of the liquid at or above a desired level. The at least one valve is communicatively coupled to a controller. The method further includes sending a signal from the at least one valve to the controller, and determining diagnostic data based at least in part on the signal.

A monitoring system for monitoring a liquid handling system may comprise at least one liquid level sensor and/or at least one gateway computer. The at least one liquid level sensor may be configured to monitor at least one liquid level of at least one liquid handling element. The at least one gateway computer may be in communication with the at least one liquid level sensor. The at least one gateway computer may be configured to receive sensor readings, report information describing the readings, identify at least one rule-triggering event, and perform an action in response to identifying the at least one rule-triggering event in accordance with at least one rule.

A monitoring system for monitoring a liquid handling system may comprise at least one liquid level sensor and/or at least one gateway computer. The at least one liquid level sensor may be configured to monitor at least one liquid level of at least one liquid handling element. The at least one gateway computer may be in communication with the at least one liquid level sensor. The at least one gateway computer may be configured to receive sensor readings, report information describing the readings, identify at least one rule-triggering event, and perform an action in response to identifying the at least one rule-triggering event in accordance with at least one rule.

A fire truck operable to automatically refill a water tank comprises a first pressure transducer coupled to an intake inlet of the pump and operable to measure an intake pressure, a second pressure transducer coupled to a discharge outlet of the pump and operable to measure a discharge pressure, a first discharge pipe coupled between the discharge outlet of the pump and a fire hose, a second discharge pipe coupled between the discharge outlet of the pump and the water tank, a control valve disposed in the second discharge pipe, and a controller operable to automatically sense a low water level condition of the tank, and automatically control the engine speed, the pump speed, and the control valve so that adequate water supply to the fire hose via the first discharge pipe is automatically given priority and maintained while automatically refilling the water tank via the second discharge pipe.

A fire truck operable to automatically refill a water tank comprises a first pressure transducer coupled to an intake inlet of the pump and operable to measure an intake pressure, a second pressure transducer coupled to a discharge outlet of the pump and operable to measure a discharge pressure, a first discharge pipe coupled between the discharge outlet of the pump and a fire hose, a second discharge pipe coupled between the discharge outlet of the pump and the water tank, a control valve disposed in the second discharge pipe, and a controller operable to automatically sense a low water level condition of the tank, and automatically control the engine speed, the pump speed, and the control valve so that adequate water supply to the fire hose via the first discharge pipe is automatically given priority and maintained while automatically refilling the water tank via the second discharge pipe.

A water supply control system is disclosed that comprises a computer-implemented control system coupled to a plurality of gates, one or more pumps, and a plurality of sensors. The computer-implemented control system is configured to receive a request to transfer excess water from a non-water supply lake to a water supply lake and determine, based at least in part on data from the plurality of sensors and geographic locations of the non-water supply lake and the water supply lake, whether transferring water as requested will cause or worsen a flood event. In response to a determination that transferring water as requested will not cause or worsen a flood event, the computer-implemented control system is further configured to issue a command to cause a gate associated with a dam at the non-water supply lake to open such that water is transferred from the non-water supply lake to the water supply lake.

A water supply control system is disclosed that comprises a computer-implemented control system coupled to a plurality of gates, one or more pumps, and a plurality of sensors. The computer-implemented control system is configured to receive a request to transfer excess water from a non-water supply lake to a water supply lake and determine, based at least in part on data from the plurality of sensors and geographic locations of the non-water supply lake and the water supply lake, whether transferring water as requested will cause or worsen a flood event. In response to a determination that transferring water as requested will not cause or worsen a flood event, the computer-implemented control system is further configured to issue a command to cause a gate associated with a dam at the non-water supply lake to open such that water is transferred from the non-water supply lake to the water supply lake.

An apparatus for automatically filling water in an above-ground pool. The apparatus includes an open-sided enclosure, an inlet pipe, an intermediate pipe, a water-level control valve, and pool mounting mechanism. The open-sided enclosure houses and supports the constituents of the apparatus. The inlet pipe connects to an external water supply and traverses normal and into a top wall of the open-sided enclosure. The intermediate pipe is telescopically engaged into the inlet pipe and fixed to the water-level control valve. This puts the inlet pipe and the water-level control valve in fluid communication. The pool mounting mechanism is mechanically integrated into the open-sided enclosure and attaches the apparatus to a frame of the pool. The water-level control valve manages water being pumped into the pool in order to maintain a constant water level. An actuatable lifter is used to raise or lower the water-level control valve within the open-sided enclosure.

The present disclosure generally relates to systems and methods for purging water or gas from a fuel cell system. The fuel cell system may include a multi-phase valve system and/or a separate valve system. The opening and closing of the valve systems for removing gas and water is controlled by a controller,