Abstract: A dual leak detection system includes two water lines, a first leak detection switch disposed on the first water line, and a second leak detection switch disposed on the second water line. The first leak detection switch includes a first flow sensor and a first valve. Similarly, the second leak detection switch includes a second flow sensor and a second valve. The leak detection system further includes a controller in communication with the first and second leak detection switches. The controller is configured to communicate an alarm state from the first leak detection switch to the second leak detection switch and communicate an alarm state from the second leak detection switch to the first leak detection switch. When in the alarm state, the first leak detection switch is configured to close the first and second valves.

Abstract: A fluid supply system includes: a backflow preventer; and a bypass coupled in parallel with the backflow preventer, the bypass comprising at least one bypass flow meter coupled to at least one check valve, at least one of the at least one bypass flow meter or the at least one check valve being configured to generate associated alarm data in response to flow of a fluid through the bypass and transmit a flow alarm signal to a building fire panel when the associated alarm data indicates that the flow of the fluid varies from an expected flow of the fluid.

Abstract: A sensor cartridge assembly for coupling in a fluid network. The cartridge assembly includes a tubular body including a spoke extending radially inward and distally out of the tubular body, and a threaded hollow end formed on the spoke. The spoke forms a conduit extending from an intermediate point of the tubular body into the threaded hollow end. The cartridge assembly includes a sensor assembly including a sensor head and a sensor lead extending from the sensor head through the conduit. Further, the cartridge assembly includes a nut threaded to the threaded hollow end to form a chamber, the nut including a distal annular rim. The sensor head is retained in the chamber by the distal annular rim of the nut so that the conduit and, thereby the sensor lead, are sealed from fluid in the fluid network.

Abstract: Methods for Ultrasonic Flow Metering, Ultrasonic Flow Meter Calibration, and Ultrasonic Fluid Characterization. Focusing on the governing principles and equations of flow measurement for ultrasonic flow meters, using temperature referenced differential and absolute time of flight measurements to characterize fluid motion. As well as, experimental solutions to meter calibration constants, thermal expansion, concentration change in fluid validation/correction using a ratiometric approach comparing expected and measured zero flow measurements, change of fluid in process validation/correction using acoustic properties of a specific fluid, and zero flow correlations/validation based on time of flight and temperature, referenced to historically captured data and the acoustic properties of the fluid in the process.

Abstract: Methods for Ultrasonic Flow Metering, Ultrasonic Flow Meter Calibration, and Ultrasonic Fluid Characterization. Focusing on the governing principles and equations of flow measurement for ultrasonic flow meters, using temperature referenced differential and absolute time of flight measurements to characterize fluid motion. As well as, experimental solutions to meter calibration constants, thermal expansion, concentration change in fluid validation/correction using a ratiometric approach comparing expected and measured zero flow measurements, change of fluid in process validation/correction using acoustic properties of a specific fluid, and zero flow correlations/validation based on time of flight and temperature, referenced to historically captured data and the acoustic properties of the fluid in the process.