Abstract: Provided is a highly reliable thermal flow meter. In a thermal flow meter 20, a flow rate detection element 321 that detects an air flow rate, and a conductive coating film 400 containing a conductive substance and a resin as constituent elements are provided on at least a part of a portion provided in an auxiliary passage 135 on a surface facing a detection surface 322 of the flow rate detection element 321.

Abstract: Methods and apparatuses associated with flow sensing devices are provided. An example flow sensing device may include a sensing element disposed at least partially within the housing, and a plurality of channels disposed within the housing defining a flow path configured to convey a flowing media through the flow sensing device, wherein the flow path is disposed proximate the sensing element such that at least a portion of the flowing media makes direct contact with the sensing element.

Abstract: It is an object to provide a flow rate sensor device having improved sensor responsiveness compared with the prior art. The present invention is a flow rate sensor device including a sensor element that detects a flow rate; a unit body including a sensor unit in which the sensor element is mounted, and a case accommodating the unit body, wherein the sensor unit is supported away from a bottom surface of the case. In this way, the sensor unit is supported to float upward from the bottom surface of the case, and a space is provided between the sensor unit and the bottom surface. Therefore, heat caused in the sensor unit can be separated from outside, and good sensor responsiveness can be maintained.

Abstract: A radar sensor for measuring a fill level and/or a point level of a product in a container is described, including a sensor configured to emit and/or to receive a radar signal; evaluation circuitry configured to determine a measurement signal; a housing having at least one housing region configured such that the radar signal can be transmitted through the housing region; an adhesive surface including an adhesive material, configured to attach the radar sensor to the container wall, is disposed on the outside of the housing at least along a portion of an outer circumference of the housing region, and a sealing surface including a sealing material configured to at least partially seal the housing region when the radar sensor is attached to the container wall, the sealing surface being disposed on the outside of the housing at least along a portion of the outer circumference of the housing region.

Abstract: Sensors, methods, and computer program products for air bubble detection are provided. An example method includes determining a first moving average for a first period of time based upon first temperature data and determining a second moving average for the first period of time based upon second temperature data. The method includes determining a first air presence parameter based upon a comparison between the first temperature data and the first moving average and a comparison between the second temperature data and the second moving average. The method includes determining a second air presence parameter based upon a comparison between the first temperature data, the second temperature data, and calibrated air thresholds. The method includes determining a third air presence parameter based upon a comparison between a first temperature data entry and each second temperature data entry. An air bubble within a fluid flow system is detected based upon the parameters.

Abstract: A Wheatstone bridge flowmeter is provided with a flow channel on a top surface of the base substrate, with two resistors of the Wheatstone bridge in thermal communication with the flow channel. One resistor in the flow channel, on one side of the Wheatstone bridge, has a negative coefficient of resistance (NTC) and the other resistor in the flow channel, on the other side of the Wheatstone bridge, has a positive coefficient of resistance (PTC). At least two of the resistors in the Wheatstone bridge are mounted in at least one cavity space, so that one resistor on each side of the Wheatstone bridge is in thermal isolation from the flow channel, thereby allowing sensing of voltages across the Wheatstone bridge according to fluid flow through the flow channel.

Abstract: A flow rate assembly can include a housing having a measurement channel extending along the housing axis and through a portion of the housing between the first and second ends of the housing, an outer cup portion positioned at least partly within the housing, and a transducer positioned within the outer cup portion and sealed from fluid flow past the outer cup portion, the transducer having a width perpendicular to the housing axis and greater than the width of the measurement channel, the transducer configured to generate an ultrasonic signal and to direct the ultrasonic signal through the measurement channel.

Abstract: A flow sensor includes a semiconductor, an electric control circuit, a lead frame, and a spacer. The spacer is disposed in a clearance between the lead frame and the semiconductor device on an opposite side from a joint portion of the semiconductor device with the lead frame on a side of the electric control circuit across the diaphragm disposed therebetween. A surface of the electric control circuit and a part of a surface of the semiconductor device is covered with resin while the air flow sensing unit is exposed. At the joint portion, the semiconductor device is attached to the lead frame via an adhesive.

Abstract: A fire detection apparatus 1A includes a detector cover 70A for inhibiting ambient light from entering a detection space 60A, an inner cover 30A that accommodates the detection space 60A and the detector cover 70A, an outer cover 20A that accommodates the inner cover 30A, a first opening 30aA provided in a side portion on an opposite side from a side portion on an installation surface side among side portions of the inner cover 30A, a second opening provided in a side portion on an opposite side from a side portion on an installation surface among side portions of the detector cover 70A, and a flat plate-shaped insect screen 50A provided on the detector cover 70A and configured to substantially cover the entire second opening.

Abstract: A laser processing system that can effectively blow out a material of a workpiece melted by a laser beam by effectively utilizing an assist gas emitted from a nozzle. The laser processing system comprises a nozzle including an emission opening configured to emit a jet of an assist gas along an optical axis of a laser beam, the nozzle being configured to forming a maximum point of velocity of the jet at a position away from the emission opening; a measuring instrument configured to measure the velocity of the jet; and a position acquisition section configured to acquire information representing a position of the maximum point based on output data of the measuring instrument.

Abstract: A mass flow sensor is provided with reduced zero point fluctuation, and a mass flow meter and a mass flow controller using the mass flow sensor, the mass flow sensor comprising a U-shaped flow path passage in which a fluid flows from first end to a second end, having a bottom portion and two straight portions connecting the bottom portion to the ends, a first thermal resistor wound around one of the straight portions, a second thermal resistor wound around the same straight portion as the first thermal resistor and provided away from the first thermal resistor toward the second end, and a heat dissipating portion provided so as to be in contact with the flow path passage on the side opposite to the second thermal resistor across the first thermal resistor.

Abstract: Provided are flow sensor assemblies for determining a flow rate of a liquid that include an O-ring support, a printed circuit board (PCB) positioned in the O-ring support, a plurality of couplings of a male sensor pin and a female sensor pin, a plurality of thermistors associated with the plurality of couplings, wherein each thermistor of the plurality of thermistors are positioned on the PCB and are adjacent to a respective coupling of the plurality of couplings, and an over-molding material that holds the PCB in place with regard to the O-ring support. Methods are also provided.

Abstract: A physical quantity measurement device measures a physical quantity of a fluid. A detection unit has a physical quantity detector that detects a physical quantity of the fluid in a measurement flow channel. A housing accommodates at least a part of the detection unit and forms the measurement flow channel. The housing includes a housing attachment that is attached to a predetermined attaching target, and a position holder holding a position of the detection unit by contacting the detection unit. The housing includes an inward part positioned inward of the attaching target and an outward part positioned outward of the attaching target. The position holder is provided inward of the housing attachment in an alignment direction along which the inward part and the outward part are aligned.

Abstract: An electronic utility gas meter using MEMS thermal mass flow sensor to meter gas custody transfer and MEMS gas thermal property sensor to compensate the metering values due to gas composition variations is disclosed in the present invention. The meter is designed to have a MEMS mass flow sensor to meter the city utility gas consumption independent of environmental temperature and pressure while a MEMS gas thermal property or dual gas thermal property sensors to compensate the tariff due to the gas composition variations for compliance with the current regulation requirements of tariff and remove the major concerns for the wide deployment of the thermal mass MEMS utility gas meters.

Abstract: A flowmeter is inserted into a main passage through which a target fluid flows. The flowmeter includes a housing, a sub passage, an inlet portion, an outlet portion, a flow rate detector, and a protrusion. The housing includes a side surface and a tip end surface. A part of the target fluid flows into the sub passage from the main passage. The target fluid flows into the sub passage through the inlet portion and flows out of the sub passage through the outlet portion. The flow rate detector is configured to detect a flow rate of the target fluid flowing through the sub passage. The tip end surface includes a first end area and a second end area. The protrusion protrudes from the tip end surface and is located in both the first end area and the second end area.

Abstract: A flow meter includes: a flat substrate; a housing that houses the substrate and has an open in at least one surface; a cover that covers the substrate and covers an open surface of the housing; a support that supports the substrate and is in contact with the cover and the substrate; and a fixing unit that connects the substrate and the housing, in which, in a first region and a second region formed by dividing the substrate into two parts at a center in a longitudinal direction, the support is disposed in the first region, and the fixing unit is disposed in the second region.

Abstract: The flow rate measurement device according to one aspect of the present invention comprises a heating unit for heating a fluid; temperature sensing units that are provided flanking the heating unit in the direction of fluid flow, and that sense the temperature of the heated fluid; a flow rate calculation unit that calculates the flow rate of the fluid on the basis of a sensing signals outputted from the temperature sensing units; angle calculation unit for calculating the tilt angle of the temperature sensing units with respect to a specific reference plane; a storage unit that stores the relation between the flow rate, the tilt angle, and a flow rate correction value; and a flow rate correction unit that corrects the flow rate by using the flow rate correction value stored in the storage unit.

Abstract: A process fluid temperature estimation system includes a mounting assembly that is configured to mount the process fluid temperature estimation system to an external surface of a process fluid conduit. A sensor capsule has at least one temperature sensitive element disposed therein. Measurement circuitry is coupled to the sensor capsule and is configured to detect a characteristic of the at least one temperature sensitive element that varies with temperature and provide sensor capsule temperature information. A high temperature spacer has a known thermal conductivity and is configured to be interposed between the external surface of the process fluid conduit and the at least one temperature sensitive element.

Abstract: Provided is a thermal flowmeter that can achieve both measurement accuracy and antifouling performance with a simple and space-saving passage structure. In the thermal flowmeter of the invention, a housing is disposed in a main passage through which a gas to be measured flows, and the gas to be measured is taken from the main passage into an auxiliary passage provided in a housing, and a flow rate detection unit disposed in the auxiliary passage measures a flow rate of the gas to be measured. The auxiliary passage includes an inlet opening that opens to be inclined with respect to the main flow direction of the gas to be measured flowing through the main passage, and an inclined passage that extends in a direction inclined with respect to the main flow direction of the gas to be measured flowing from the inlet opening through the main passage.

Abstract: The present disclosure relates to a method for producing a probe of a thermal flow meter for measuring the mass flow rate of a medium in a measuring tube, the method having the following steps: introducing a probe core in the form of a material to be melted into a first probe casing, the first probe casing having an open first end and a closed second end facing away from the first end; melting the probe core; quenching the probe core to a temperature below the solidification temperature; attaching a thermoelement to a contact surface of the solidified probe core. The invention also relates to a probe obtained according to the production method and to a flow meter including the probes according to the present disclosure.

Abstract: Provided is a power converter capable of being miniaturized while securing noise resistance and insulation between a power semiconductor module and a drive circuit board.

Abstract: The purpose is to improve the measurement accuracy of a thermal air flow meter. The device has: an auxiliary passage for entraining a portion of a fluid being measured; a sensor chip arranged in the auxiliary passage, for measuring the flow rate of the fluid being measured; an electronic component having an internal resistor, for converting the fluid flow rate detected by the sensor chip to an electrical signal; and a substrate on which the sensor chip and the electronic component are mounted. The substrate is covered by a filler material, on the surface of which the electronic component is mounted.

Abstract: A sensor for measuring the flow rate of a fluid in a flow tube, the sensor comprising sensing means and a sensor body, wherein a portion of the sensing means is located within the sensor body and a first portion of the sensor body is arranged to fasten the sensor body to the flow tube such that the sensor is positioned for sensing the flow rate of the fluid in the flow tube.

Abstract: A method includes receiving a carrier with a plurality of wafers inside; supplying a purge gas to an inlet of the carrier; extracting an exhaust gas from an outlet of the carrier; and generating a health indicator of the carrier while performing the supplying of the purge gas and the extracting of the exhaust gas.

Abstract: A sensor for measuring the flow rate of a fluid in a flow tube, the sensor comprising sensing means and a sensor body, wherein a portion of the sensing means is located within the sensor body and a first portion of the sensor body is arranged to fasten the sensor body to the flow tube such that the sensor is positioned for sensing the flow rate of the fluid in the flow tube.

Abstract: The present disclosure relates to a sensor for a thermal flow measuring device, to a thermal flow measuring device, as well as to a method for the manufacture of such a sensor. The sensor includes a sensor thimble, wherein a defined separation of a sensor element from a thimble floor of the sensor thimble is provided by spacers so that a temperature transfer between the sensor and a liquid flowing around the sensor is provided. Thermal contact between the thimble floor and the sensor element is provided by a solder layer.

Abstract: The invention relates to a control unit (10; 10a to 10d), particularly for vehicle navigation, having a housing (13) that consists of at least two housing elements (11, 12; 61, 65, 72; 75), having at least one circuit carrier (16; 16a; 64; 81) on which at least one heat-generating component (1) is arranged, having a thermal transfer element (30; 61), made of metal, for dissipating the heat generated by the at least one heat-generating component (1), having at least one sensor element (40, 41) that is connected at least indirectly to the at least one circuit carrier (16; 16a; 64; 81), having at least one plug connection body (35), made of plastic, having connection elements (36) for making electrical contact with the at least one circuit carrier (16; 16a; 64; 81), wherein the plug connection body (35) is formed in the region of a frame-like or cover-like housing element (12; 65;75), made of plastic, so as to be integral therewith or as a component that is separate from the housing element (12; 65; 75).

Abstract: An inverter-integrated motor according to the present invention is configured such that an inverter module and a motor are integrated so as to line up in an axial direction of the motor, the inverter module is configured into a single member in which are integrated: a power portion that includes an inverter; and a control portion that includes a microcomputer, and the motor includes: a rotor; a stator; and a pair of housings that include bearings that support a shaft of the rotor.

Abstract: The present invention has been made to improve measurement accuracy of a thermal flow meter. In the thermal flow meter according to the invention, a circuit package (400) that measures a flow rate is molded in a first resin molding process. In a second resin molding process, a housing (302) having an inlet trench (351), a bypass passage trench on frontside (332), an outlet trench (353), and the like are formed through resin molding, and an outer circumferential surface of the circuit package (400) produced in the first resin molding process is enveloped by a resin in the second resin molding process to fix the circuit package (400) to the housing (302).

Abstract: A sensor for determining at least one parameter of a fluid medium, in particular an intake air mass flow of an internal combustion engine, flowing through a measuring channel is provided. The sensor includes a sensor housing, in particular a plug-in sensor that is introduced or introducible into a flow tube and in which the measuring channel is formed, and at least one sensor chip situated in the measuring channel for determining the parameter of the fluid medium. The sensor housing includes an electronics compartment for accommodating an electronic module, and an electronics compartment cover for closing the electronics compartment. The electronics compartment cover has electrically conductive properties at least in part. The electronic module is electrically conductively connected to an interior of the electronics compartment cover.

Abstract: A system, method and device for mass airflow sensor signal processing includes a microcontroller, a mass airflow sensor and an engine PCM. An analog-to-digital converter (ADC) converts a first output signal from the mass airflow sensor to a first VDC value. A digital-to-analog converter (DAC) converts a second VDC value to a second output signal associated with the mass airflow sensor. Transfer functions are obtained from a flow bench using the mass airflow sensor, performance air intake components, and stock air intake components. The microcontroller determines, from the first VDC value, a corresponding actual flow rate. From the actual flow rate, a corresponding stock VDC value is determined. The stock VDC value is then output to the DAC for conversion to the output second signal associated with the mass airflow sensor for communication to the engine PCM.

Abstract: A thermal flow-rate sensor includes: a first temperature sensor that detects the temperature at a specified location of the outer-wall surface of a pipe; a heat-transfer element that is arranged on the outer-wall surface of the pipe in a state separated from the first temperature sensor, and that exchanges heat with a measurement medium by heating or cooling the outer-wall surface of the pipe; a second temperature sensor that detects the temperature of a portion of the outer-wall surface of the pipe that is heated or cooled by the heat-transfer element; and a control unit that performs specified processing.

Abstract: A device for measuring a volume flow in a ventilation pipe (1) comprises a sensor element (13) disposed on the mounting (8) and configured as a thermal anemometer. Upstream of the sensor element is a turbulence-generating element, which is configured and disposed at a distance from the sensor surface (18.1) such that highly turbulent flow is generated in the region of the sensor surface in a targeted manner. Downstream of the sensor surface is a flow element (20), which widens in the cross-section thereof in the flow direction (L), wherein starting from a height level of the sensor surface a height is reached that is greater than the height of the break-away edge (17.1) opposite the sensor surface.

Abstract: To improve measurement stability of a flow rate detection unit in a physical quantity detection device, a periphery of a synthetic resin material is provided with a protruding section protruding to a cover side. A physical quantity detection device includes a housing, a front cover fixed to the housing, a circuit board housed in the housing, a flow rate detection unit that detects, in a sub-path, the flow rate of a gas to be measured by being attached to the circuit board, a connecting wire that electrically connects the flow rate detection unit to the circuit board, and a synthetic resin material that seals a connecting wire-included connection portion between the circuit board and the flow rate detection unit, the front cover having a protruding section covering at least a part of the synthetic resin material by protruding into the sub-path.

Abstract: In order to reduce a flow rate error over the entire range of a sensor output value even when the relationship between the sensor output value and a flow rate value is poor in linearity, a flow rate sensor correction device includes: a sensitivity setting part adapted to set a sensitivity coefficient on the basis of an initial value and a sensitivity correction value and adjust the sensitivity of the flow rate sensor; a function calculation part adapted to calculate a corrected flow rate characteristic function on the basis of a function correction value, which is determined on the basis of the flow rate value, and a standard flow rate characteristic function; and a function modification part adapted to make a function storage part store, as a flow rate characteristic function, a final flow rate characteristic function based on the corrected flow rate characteristic.

Abstract: A connection terminal is on a flange of a thermal flow meter. A terminal connection part has a first and a second bent part. The first bent part is bent from a first direction to a second direction. The second bent part has is bent from the first bent part to a third direction. The first and second bent parts are formed such that when connection pin parts of a plurality of the connection terminals and terminal connection parts of the plurality of connection terminals are projected onto a first imaginary plane, an imaginary line L extending along a first direction passing through the projection areas of each of the terminal connection parts of the plurality of connection terminals passes between the projection areas of the connection pin parts from among the connection pin parts of the plurality of connection terminals, that are positioned on both sides.

Abstract: The present invention has been made to improve measurement accuracy of a thermal flow meter. In the thermal flow meter according to the invention, a circuit package (400) that measures a flow rate is molded in a first resin molding process. In a second resin molding process, a housing (302) having an inlet trench (351), a bypass passage trench on frontside (332), an outlet trench (353), and the like are formed through resin molding, and an outer circumferential surface of the circuit package (400) produced in the first resin molding process is enveloped by a resin in the second resin molding process to fix the circuit package (400) to the housing (302).

Abstract: A sensor may include a substrate defining a flow channel that extends through the substrate, and a plurality of bond pads on the substrate. A first housing may be disposed along the substrate and may permit at least some fluid to flow from a fluid inlet to a fluid outlet along at least part of the flow channel. A second housing may be disposed along the substrate. A sense die may be disposed between the second housing and the substrate and may include a sensing side facing the substrate with a sense element in registration with the flow channel and a plurality of bond pads on the sensing side that are in registration with, and bump bonded to, the plurality of bond pads on the substrate. An adhesive or other material may be disposed between the sensing side of the sense die and the substrate.

Abstract: A mass flow controller and mass flow meter are disclosed. The mass flow controller and mass flow meter include a sensor tube configured to transport a fluid, and an upstream heater element and a downstream heater element which are formed of heating resistance wires provided in an outer periphery of the sensor tube. At least one weld terminal is electrically connected to an end of one or more of the heating resistance wires by spot welding material. A temperature difference between the melting point of the weld terminal and a melting point of the heating resistance wires does not exceed 100 degrees Celsius, and one or more coat layer(s) is provided on a surface of the weld terminal.

Abstract: The present disclosure provides a flow rate measuring device including a first chip, a second chip, and a holding body. The first chip and the second chip are disposed in an intake passage of an internal combustion engine. The first and second chips detect at least one of a flow rate of an intake air and a parameter other than the flow rate. The holding body holds the second chip and protrudes into an inside of the intake passage. The second chip is exposed inside of the intake passage in a state where the second chip is covered by a filter. The holding body includes a resin portion that forms a surface of the holding body. The portion of the filter is inserted into the resin portion. The recessed portion is recessed from a surface of the resin portion. A portion of a first surface of the filter defines a bottom of the recessed portion. The second chip is positioned on a side of a second surface of the filter that is opposite to the first surface.

Abstract: A temperature sensor includes a sensor body and a wedge extension. The sensor body extends from a sensor base to an opposed sensor tip along a longitudinal axis. The sensor body has a leading edge and opposed trailing edge. The sensor body also has an interior flow passage with an inlet for fluid communication of fluid into the interior flow passage and an outlet for exhausting fluid out from the interior flow passage. The wedge extension is on the sensor body between the sensor tip and the sensor base on the leading edge of the sensor body.

Abstract: When an exposed part of a semiconductor chip is reduced in size, a tendency of development of a crack on the semiconductor chip is suppressed. A pressure of injection of a resin MR into a second space creates a gap on a contact part SEL where an elastic film LAF and a semiconductor chip CHP1 are in contact, and a resin MR2 different in constituent from the resin MR infiltrates into the gap. As a result, in an area of semiconductor chip CHP1 that is exposed from the resin MR, the resin MR2 is formed in an area other than a flow detecting unit FDU and an area around it. Hence, an area of semiconductor chip CHP1 that is exposed from the resins MR and MR2 can be reduced in size.

Abstract: An object of the present invention is to provide a thermal-type air flow meter with a high measurement accuracy by reducing influence of a thermal stress generated in a resistor in an LSI while securing a high positioning accuracy flow rate detection unit.

Abstract: An air flow measuring device includes a sensor assembly including a sensor portion and a sensor circuit, which are integrated with each other and configured to measure an air flow quantity. A thermistor is equipped independently from the sensor assembly and configured to measure an air temperature. The sensor circuit of the sensor assembly is equipped to a grounding end terminal in the sensor assembly. One lead wire of the thermistor is joined electrically with the grounding end terminal in the sensor assembly.

Abstract: The invention is an apparatus and method for measuring the flow rate of a liquid through a conduit. The apparatus is based on a flow rate meter which is adapted to accurately measure the volumetric flow rate of a liquid using a simple, cost and energy effective, and accurate method using only one temperature sensor. The method is based on applying a pulse of thermal energy to the flowing liquid and measuring the temperature increase as a function of time and energy input. By comparing these measurements to a calibration table made by performing similar measurements for known flow rates, the rate of flow can be determined. One application, which will be described to illustrate the features of the method and apparatus of the invention, is measurement of the flow rate of urine excreted by a catheterized patient.

Abstract: A plant water dynamics sensor usable for measuring the dynamics of water flowing in a fine point of a plant such as a distal end of a new branch or a pedicel comprises a heater-equipped temperature probe including a temperature sensor and a heater; a temperature probe including a temperature sensor; an electrical resistance probe including an electrical resistance measurement electrode; and a support that supports the probes while the probes are aligned parallel to each other. The position of a xylem XY can be detected based on an electrical resistance measured at the electrical resistance probe, so that each of the temperature sensors can be arranged correctly in a position at a phloem PH or at the xylem XY. This facilitates attachment of a plant water dynamics sensor and water dynamics in a plant can be measured with high accuracy.

Abstract: A physical quantity measuring device includes a chip package and a casing. The casing fixedly stores the chip package. The casing includes a first bypass passage allowing a gas to be measured taken from a main passage, to flow in a first measuring unit, and a second bypass passage allowing the gas to be measured taken from the main passage, to flow in a second measuring unit. The chip package is configured to dispose a signal processing unit between the first and second measuring units. The casing has a cooling unit that allows the gas to be measured from the main passage to flow between the first measuring unit and the second measuring unit, and cooling the signal processing unit.

Abstract: An air flow measuring device includes a housing, a sensing part, a temperature sensor, a supporting member, and a protective projection. The housing defines a bypass flow passage which guides a part of air flowing in a duct. The sensing part is disposed in the bypass flow passage to measure a flow rate of air in the bypass flow passage. The sensor detects temperature of air flowing in the duct outside the housing. The supporting member supports the sensor at a predetermined measurement position. The protective projection is a projection, which projects outward from a side surface of the housing and is formed by mold removal in one direction. An end of the protective projection is located outward of the sensor. The protective projection makes contact with an object approaching the sensor from outside the housing to limit contact of the object with the sensor.

Abstract: Embodiments described herein include a system for insulating a flow meter that includes a thermal tube sensor housing. The thermal tube sensor housing may include a housing cavity that holds a sensor tube, a temperature sensor, and a heater for determining a flow rate of a fluid. In some embodiments, the heater imparts thermal energy onto the sensor tube. In some embodiments, the housing cavity additionally holds an insulator for reducing leakage of the heat from the housing cavity. In still some embodiments, the insulator includes a plurality of beads and a binder material.

Abstract: Example methods and apparatus for determining fluid parameters are disclosed herein. An example method includes disposing a sensor in a first fluid flow passageway. The sensor has a heater and a temperature sensor. The example method further includes flowing a first fluid into the first fluid flow passageway via a second fluid flow passageway and determining a first fluid property value of the first fluid via the sensor when the first fluid is in the first fluid flow passageway. Based on the first fluid property value, a state of an operation is determined.