A point of entry water treatment system is connected between a water supply and a plumbing system. The system includes a valve and a network communications module. The system is configured for receiving a signal from a remote sensor via the network communications module. The signal is indicative of a detected flow event. The controller is further configured for closing the valve either automatically in response to the signal from the remote sensor or in response to a signal received from a remote user interface device via the network communications module.

A tightness-gauging device and a meter for gauging a pressure's sustainability pt for a pressure vessel or system are provided. A pressure is produced against the test fluid inside a piston cylinder communicated with the tested vessel or system by a fixed-pressure supplying assembly including a weight, a piston, and a piston cylinder successively arranged coaxially and vertically. An equation R.sub.L=pt/C is used to represent the tightness of the pressure vessel or system. The equation pt=p(p−0.5Δp)Δt/Δp is used in the meter for gauging the pressure's sustainability pt to express the pressure's sustainability, where p is the fixed test pressure, t is the elapsed time for the fluid to leak completely, C is the cubage of the pressure vessel or system, Δp is the drop value of the pressure, and Δt is the elapsed time for the pressure to descend from p to (p−Δp) caused by the leakage.

A method of diagnosing a leak in a coolant system of an automobile includes repeatedly measuring the coolant level within the coolant system at a pre-determined time interval, calculating a short term leak rate, wherein the short term leak rate is the rate of coolant leakage over a first pre-determined length of time, calculating a long term leak rate, wherein the long term leak rate is the rate of coolant leakage over a second pre-determined length of time, further wherein the second pre-determined length of time is longer than the first pre-determined length of time, identifying a coolant system leakage state based on a current coolant level within the coolant system, the short term leak rate, and the long term leak rate, and providing notification of the coolant system leakage state to an operator of the vehicle.

Fluid storage testing systems, methods and apparatus are disclosed. One or more embodiments include a closed-circuit storage volume testing system for testing a storage volume. The system may include a water tank, a pump and an oil/water separator.

A system for the non-volumetric detection of low-threshold leaks with high resolution in underground storage tanks (USTs). A UST may be located underground with a restricted tank entry opening. The interior space of a UST may be accessed with a remotely controlled device. The presence of a liquid fill material or indicia thereof evidencing a leak may be visually observed. Variables affecting volumetric measurements of leak detection, such as temperature, pressure, tank deflection, and groundwater, may be eliminated or controlled. Visual observation may enable high resolution detection of low-threshold leaks.

Exemplary embodiments disclosed herein are directed to systems and methods by which the level of liquid nitrogen in one or more liquid nitrogen storage containers can be monitored, leaks may be detected and reported, and ideal container fill level may be indicated.

A method of diagnosing a leak in a coolant system of an automobile includes repeatedly measuring the coolant level within the coolant system at a pre-determined time interval, calculating a short term leak rate, wherein the short term leak rate is the rate of coolant leakage over a first pre-determined length of time, calculating a long term leak rate, wherein the long term leak rate is the rate of coolant leakage over a second pre-determined length of time, further wherein the second pre-determined length of time is longer than the first pre-determined length of time, identifying a coolant system leakage state based on a current coolant level within the coolant system, the short term leak rate, and the long term leak rate, and providing notification of the coolant system leakage state to an operator of the vehicle.

A tube infrastructure includes a first tube; a second tube that is coupled to the first tube; and a fluid tank that is disposed to surround a coupling region of the first tube and the second tube and is filled with a fluid to seal the coupling region, wherein the fluid tank allows negative pressure to be maintained inside the first tube and the second tube.

A leak detection and recovery system for use with DRA equipment. The system is intended to reduce the risk of a chemical release into the environment, namely the soil, ground water, and waterways. The system may provide clean collection of leaked DRA, early detection of DRA leaks, immediate notification of DRA leaks, and re-use of leaked DRA through clean recovery with no hazardous waste disposal.

Exemplary embodiments disclosed herein are directed to systems and methods by which the level of liquid nitrogen in one or more liquid nitrogen storage containers can be monitored and leaks may be detected and reported.