Abstract: An air pressure differential sensing system includes a conduit defining an air passage through which air flows upon application of an air pressure differential across different regions of the air passage, a flap pivotally connected to the conduit, and a sensing device mounted proximate to the air passage and separate from the flap. The flap is configured to move about a pivotal axis in response to the air flowing through the air passage. The sensing device is configured to sense an angular position of the flap about the pivotal axis, the angular position of the flap being a function of the air pressure differential.

Abstract: A fluid meter is described having certain elastically displaceable wall portions arranged to be elastically displaced in response to a pressure variation propagating into the measurement volume.

Abstract: A Coriolis mass flowmeter with at least four bent measuring tubes, at least one actuator assembly and at least one sensor assembly, wherein a first measuring tube and a second measuring tube are located in a common first plane and a third measuring tube and a fourth measuring tube are located in a common second plane, wherein the first plane and the second plane run parallel to one another, and wherein all four measuring tubes are joined together in terms of flow on the input side and on the output side with a collector. A Coriolis mass flowmeter for large amounts of flow, which is improved in respect to its measurement accuracy, is implemented in that the geometry and/or the surface characteristics of the measuring tubes are set so that the tube flow resistance of all four measuring tubes is identical.

Abstract: A water flow detector has a spring driven mechanical timer responsive to the movement of a lever. The lever is connected to a paddle. The paddle is responsive to the flow of water in a pipe. The detector via the spring driven timer responds to the flow of water in the pipe after a predetermined delay.

Abstract: A flow body flow meter includes a flow body, a heater, and a sensor. The flow body includes an inlet, an outlet, and an internal passage coupling the inlet and the outlet. The heater evaporates at least some liquid droplets in a stream received by the flow body. The sensor has one or more sensor probes in the flow body to measure a fluid property of the stream.

Abstract: A Coriolis mass flowmeter having at least four measuring tubes running parallel, the measuring tubes being joined in pairs into a oscillation unit by being inserted in openings in a holding device (1) and wherein at least part of either a sensor or actuator device is attached to the holding device (1). A Coriolis mass flowmeter that has an increased measuring accuracy is implemented in that the measuring tube central axes (3) of a measuring tube pair span a common plane (E), that the holding device (1) has at least two attachment extensions (4), that the attachment extensions (4) extend across the common plane (E) and that the holding devices (1) with the attachment extensions (4) are mirror symmetric relative to the common plane (E) in respect to their projection viewed in the direction of the measuring tube central axes (3).

Abstract: A Coriolis mass flowmeter with a measuring tube through which a medium can flow, at least one actuator and at least one sensor, wherein the measuring tube is bent between its input and output ends into a first winding and a second winding, the first winding and the second winding merging into one another at a transitional section of the measuring tube. The first winding and the second winding run in parallel winding planes and wherein the first winding and the second winding can be excited to oscillation by the actuator and the oscillations detected by the sensor. The Coriolis mass flowmeter is comparably insensitive to the coupling of external oscillations in that oscillating sections of the first winding and the second winding are bent into a V shape that opens in a direction toward the transitional section of the measuring tube.

Abstract: A multi-functional hand strength assessment device includes a housing and at least one bellows device supported by the housing. A grip bar is interfaced with the bellows device for compression thereof. The grip bar is supported by the housing and is accessible by a user to grasp the grip bar for assessment of grip hand strength and finger pinch strength of the user. A grip is interfaced with the bellows device for compression thereof for assessment of twisting hand strength of the user. A pinch bar is supported by the housing opposite the grip bar and movement of one of the grip bar and the pinch bar towards the other compresses the bellows device for assessment of finger pinch strength of the user's fingers. A mechanical or electronic pressure gauge is in fluid connection with the bellows device to register a reading relating to hand strength.

Abstract: An ultrasound flow meter unit arranged to measure a fluid flow rate with one or more ultrasound transducers (606), and a circuit board (602) with an electronic circuit arranged to operate the ultrasound transducer(s) (106, 306). The ultrasound transducer (606), e.g. in the form of a piezo-electric element, is mechanically fixed to the circuit board (602) by a first electrically conducting fixing means which additionally serve(s) to provide an electrical connection between an electrical terminal of the transducer (606) and the electronic circuit. Hereby a functional flow measurement unit (600) is provided which can be tested prior to assembly with a flow meter housing etc. Preferably, a set of ultrasound transducers (106, 306) are soldered directly onto electrically conducting paths (631) on a surface of the circuit board (602) being in electrical connection with the electronic circuit, e.g. in a single SMT mounting process together with mounting of all other electronic components on the circuit board (602).

Abstract: A measuring system comprises: a measuring transducer for producing oscillation measurement signals; and transmitter electronics electrically coupled with the measuring transducer for activating the measuring transducer and for evaluating oscillation measurement signals delivered by the measuring transducer. The measuring transducer includes: a transducer housing, a first housing end housing end, first flow divider having exactly four flow openings, an outlet-side, second housing end formed by means of an outlet-side, second flow divider having exactly four flow openings mutually spaced from one another, and a tube arrangement having exactly four, straight, measuring tubes forming flow paths arranged for parallel flow and connected to the flow dividers, an electromechanical exciter mechanism for producing and/or maintaining mechanical oscillations of the four measuring tubes and a vibration sensor arrangement reacting to vibrations of the measuring tubes.

Abstract: A measuring system comprises a measuring transducer which includes: a transducer housing with an inlet-side flow divider having exactly four, mutually spaced flow openings and an outlet-side housing end having exactly four, mutually spaced flow openings; four measuring tubes connected to the flow dividers for guiding flowing medium along flow paths connected in parallel; an electromechanical, exciter mechanism for producing and/or maintaining mechanical oscillations of the four measuring tubes; as well as a vibration sensor arrangement reacting to vibrations of the measuring tubes for producing oscillation measurement signals representing vibrations of the measuring tubes. Transmitter electronics includes a driver circuit for the exciter mechanism, and a measuring circuit. The measuring circuit of the measuring system of the invention corrects a change of at least one characteristic variable of the oscillation measurement signals delivered from the measuring transducer.

Abstract: There is provided a hydraulic system, including an oil tank storing operating oil, a hydraulic actuator, and a hydraulic pump which draws the operating oil from the oil tank and supplies the operating oil to the hydraulic actuator. The hydraulic system is provided with an operating oil separating unit which is located at a midway point of a main tube sending the operating oil from the hydraulic pump to the hydraulic actuator and which separates a part of the operating oil supplied from the hydraulic pump to return the part of the operating oil to the oil tank. A universal testing machine including the hydraulic system is also provided.

Abstract: An ultrasonic transducer is described for use in a fluid medium. The ultrasonic transducer includes at least one piezoelectric transducer element and at least one matching element for promoting an oscillation injection between the piezoelectric transducer element and the fluid medium. The ultrasonic transducer also includes a housing (112), the piezoelectric transducer element being inserted in the housing. The housing has at least one opening facing the fluid medium, the matching element being inserted at least partially into the opening. The ultrasonic transducer also has at least one sealing element, which seals at least one intervening space between the matching element and the housing in such a way that an inner space of the housing is at least largely sealed from the fluid medium.

Abstract: The invention relates to a method of diagnosing the operation of a water purification installation of the filter medium device type, the material of the filter medium being made up of particles, the method including the following steps: a characterization step of characterizing at least one physical and/or mechanical parameter of the filter medium device to establish a permeability value Ks (expressed in m/s); a comparison step of comparing said established permeability value Ks with a predetermined range [kmin; kmax] of permeability values representing a satisfactory operating state of the purification installation; and a diagnosis step during which the filter medium device is assigned an operation indicator according to the result of the comparison step. Applications include non-collective sanitation (NCS) systems and stand-alone sanitation systems.

Abstract: Sap flow sensor apparatus and concomitant methodology for determining the sap flow within plant stems of herbaceous plants and trees using a simplified Stem Heat Balance methodology. Optimum irrigation and utilization of beneficial plant health statistics are enabled using a sap flow sensor apparatus configured with a flexible, sealed sensor layer and multi-layered insulation including an elastic hook-and-loop attachment for enclosing the flexible, sealed sensor layer, soft-foam insulation, a waterproof membrane cloth permeable to water vapor and impermeable to water drops, and an outermost reflective barrier. Based upon the calculations derived from the simplified Stem Heat Balance formula, embodiments afford operational and economic efficiencies due to reduction of the prerequisite electronics to a 1-Channel dT signal.

Abstract: A continuous atmospheric horizontal dustfall flux measurement apparatus includes: a dust sampling port that includes a ceiling plate, a side wall, and four or more partition plates; a suction pipe; a continuous dust amount measurement device that continuously measures a dust amount per unit time; a blower or a compressor; an exhaust port, wherein the side wall is a plate that has a vertical center axis and has a side surface with a substantially circular or polygonal truncated cone shape widened upward, and wherein the side wall includes a suction port which is formed at the lower end thereof so as to be connected to the suction pipe and an external air inlet which has four or more openings disposed at the same interval in the circumferential direction of the side wall at a constant height near the upper end thereof.

Abstract: A low power, low cost system and method for the detection of flow disturbances in a fluid dripping system is disclosed. In one embodiment, a light source and a light detector configured to monitor the amount of light passing through a droplet while the droplet is suspended and later falls from the tip of a tube. In another embodiment, dripping fluid is monitored from a system maintained part of the time in a sleep mode to conserve power, the system waking up at predetermined times to determine from detected light whether the monitored system is functioning properly.

Abstract: A measuring arrangement for determining a chemical and/or physical, measured variable-especially a volume flow and/or mass flow-of a measured material flowing through a pipeline, wherein the measuring arrangement comprises a measuring transducer, wherein the measuring transducer includes at least one optical waveguide, which serves for producing, registering and/or transmitting measurement signals, and wherein the registering of the measuring signals in the optical waveguide occurs by means of a Fabry-Pérot sensor.

Abstract: Vortex-shedding flow meters are operated at a sampling frequency high enough to detect each vortex multiple times. Using a fixed sampling frequency high enough for a maximum rate of vortex generation oversamples the vortices generated at low flow rates. Adjusting the sampling rate to accord with the flow rate being measured significantly reduces electric power consumption.

Abstract: Apparatus for measurement of airflow in a duct is described. The apparatus combines a Pitot tube, sensing apparatus, control apparatus, a display, control switches and a handle into a unitary structure that is holdable with a single hand while performing obtaining measurement data.