We disclose herein a flow sensor assembly comprising a first substrate, a flow sensor located over the first substrate, a lid located over the flow sensor, a flow inlet channel, and a flow outlet channel. A surface of the flow sensor and a surface of the lid cooperate to form a flow sensing channel between the flow inlet channel and the flow outlet channel, and a surface of the flow sensing channel is substantially flat throughout the length of the flow sensing channel.

An improved skin blood flow measurement apparatus consists of a chassis with an antenna connected with the chassis such that the antenna directs RF energy at an area of a skin surface below the chassis. A temperature sensor is also connected with the chassis such that the temperature sensor is held in fixed relation to the antenna and such that the temperature sensor is also directed to the same said area of a skin surface below the chassis for measurement of temperature of the area and further where the temperature sensor does not contact the skin surface and where the chassis supports the antenna and the temperature sensor in fixed relation to the area.

A thermal flow sensor is provide for beverage metering using a heater in physical and thermal communication the beverage dispensing conduit. A temperature sensing element is positioned distant from and downstream from said heater along said direction of fluid flow. A computing device controls the heater and the temperature sensing element and computes a cumulative total volume during a metering cycle. The computing of a cumulative total volume during a metering cycle may be adapted or approximated to account for residual changes in temperature of the conduit or thermal sensing element metering cycles. Flow measurement is thereby without direct physical contact with the beverage itself, thereby providing cleanable fluid paths within the beverage conduit that limits or eliminate voids or trapped volumes. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

A method of electronically deriving a conclusion of a condition of slurry flow in a non-vertical conduit having a conduit wall and which contains a slurry to flow or flowing along the conduit is provided.

Reliable flow sensors with enclosures that have predictable thermal variations and reduced mechanical tolerances for a more consistent fluid flow and more consistent flow measurements. Thermal variations can be made predictable by using etched structures in silicon blocks. Mechanical tolerances can be reduced using lithography and high-precision semiconductor manufacturing equipment and techniques.

A sensor with both Coriolis tube and thermal tube is used to measure the mass flow rate of the fluid using both the Coriolis principle and the thermal method simultaneously. Above certain flow rate, the flow rate is measured by the Coriolis tube and below that flow rate, it is measured by the thermal tube. The Coriolis tube and the thermal tube are arranged parallelly with the common inlet and outlet. Two resistant coils are wound on the thermal tube to do the thermal measurement and a magnetic disk is attached to the Coriolis tube, work together with an excitation coil and two optical sensors to do the Coriolis flow measurement. It takes the advantages of both technologies and create a flow sensor which is super accurate, gas type insensitive, long-term stable and fast responsive without too much pressure drop.

In one example, the disclosure relates to a medical device system comprising an elongated body defining a lumen where the elongated body comprising a proximal portion and a distal portion. A sensor coupled to the elongated body where the sensor comprises a first ultrasonic sensor configured to transmit a first ultrasonic signal in a first direction through a fluid flowing distally within the lumen. The sensor comprising a second ultrasonic sensor configured to transmit a second ultrasonic signal in a second direction through the fluid flowing distally within the lumen where the second ultrasonic sensor may be positioned on the elongated body proximal to the first ultrasonic sensor. The first ultrasonic sensor is configured to receive the second ultrasonic signal transmitted through the fluid flowing in the lumen. The second ultrasonic sensor is configured to receive the first ultrasonic sound transmitted through the fluid flowing in the lumen.

Methods, systems, and apparatuses are provided for detecting and determining conditions of and conditions within a fluid conduit.

A thermal flowmeter including a measurement tube that has an inflow port into which a liquid flows and an outflow port that allows the liquid which flows in from the inflow port to flow out, and has an internal flow passage where the liquid flows formed to extend along an axis, and a plurality of detection sections each of which has a heating resistor and a temperature detecting resistor along the axis and is provided at the measurement tube, and a control section that calculates a flow rate of the liquid flowing through the internal flow passage based on signals from the plurality of detection sections, wherein the plurality of detection sections are respectively provided with predetermined intervals left in a circumferential direction with the axis as a center.

A mass flow control apparatus having a monolithic base. The monolithic base has a gas inlet, a gas outlet, a first flow component mounting region, a second flow component mounting region, and a third flow component mounting region. The first flow component mounting region has a first inlet port and a first outlet port, the first inlet port being fluidly coupled to the gas inlet of the monolithic base. The third flow component mounting region has a first sensing port fluidly coupled to the gas outlet of the monolithic base.