Abstract: A vortex flowmeter configured for ease of installation in a pipe, having a piezoelectric vortex-sensing element located within its shedder bar and mounted in a removable capsule.

Abstract: A vortex flowmeter configured for ease of installation in a pipe, having a piezoelectric vortex-sensing element located within its shedder bar and mounted in a removable capsule.

Abstract: A vortex flowmeter configured for ease of installation in a pipe, having a shedder bar which enters the pipe through a hole and has its distal end constrained by direct or indirect frictional contact with the opposite wall of the pipe.

Abstract: A system and method of sensing pressure in a device that seals against the outside of a pipe and has a probe projecting into the pipe.

Abstract: A system and method of automatically zeroing a target flowmeter wherein a lack of variation in the raw flow signal is taken as an indication of lack of turbulence, and thus of an extremely low-flow condition under which automatic zeroing may be performed.

Abstract: A flowmeter of the target type, having a flow-sensing probe constructed to be inserted into a pipe through a small hole. The required small size is achieved in part by allowing the probe to deflect and thus shift in orientation relative to the flow as the force on the probe changes, the resulting distortion of the signal being compensated for in firmware. The target is made contiguous with its support, maximizing the area presented to the flow relative to the size of the hole through which the probe is inserted. The flowmeter may be configured to be mounted to the outside of a pipe and include means for sealing to the outside of the pipe. It may also include pressure- and temperature-sensing elements and means to calculate mass flow of a gas.

Abstract: A leak detector is proposed for fluid systems serving intermittent loads. The device generates a signal representative of the minimum level of flow occurring from time to time, this level of flow being taken as the rate of leakage. On the basis of this signal, the device generates outputs indicative of the presence and relative magnitude of leakage. A preferred form of the device monitors flow with a thermal fluid flow detector which is adapted to be removably mounted on a distribution system pipe and to be sufficiently inexpensive to permit wide application of the device to small fluid distribution systems, such as residential water systems.