Provided is a thermal flow meter including a conductive measurement tube including an inlet through which liquid enters and an outlet through which the liquid exits and including an internal flow passage extending along an axis, and a sensor substrate including a heating resistance wire and a temperature detecting resistance wire formed on a detection surface along the axis, and in the detection surface, an insulation area is formed where the heating resistance wire and the temperature detecting resistance wire are coated with a thin-film insulating material, and the insulation area is joined to the measurement tube along the axis.

Disclosed is an apparatus for measuring a fluid flow through a pipe of a semiconductor manufacturing device, in particular a coater or a bonder. The apparatus includes a sealing structure arranged in the pipe, a flow structure having a fluid inlet arranged upstream of the sealing structure and a fluid outlet arranged downstream of the sealing structure, a first chamber arranged in the pipe upstream of the sealing structure, and a second chamber arranged in the pipe downstream of the sealing structure, and a measuring device, wherein the measuring device is adapted to measure a first fluid pressure in the first chamber and a second fluid pressure in the second chamber, wherein the measuring device is configured to determine the fluid flow based on the first and second fluid pressure.

A system includes a downhole tool having a housing and a passage extending through the housing, where the passage includes an inlet configured to receive a flow of a wellbore fluid and an outlet configured to discharge the flow of the wellbore fluid. The downhole tool includes a heating element configured to heat the flow of the wellbore fluid and to enable the flow of the wellbore fluid to transition to a single-phase fluid flow within the passage. The downhole tool includes a phase composition sensor positioned adjacent the passage and configured to provide feedback indicative of formation of the single-phase fluid flow. The system includes a controller configured to monitor a power consumption of the heating element and to determine an enthalpy of the wellbore fluid based in part on the power consumption and the feedback from the phase composition sensor.

A non-invasive thermal dispersion flow meter with chronometric monitor for fluid leak detection includes a heater, an ambient temperature sensor and a flow rate sensor which are configured to sense the temperature of a fluid in a conduit, and then monitor the flow of that fluid through the conduit. Based upon the ambient temperature sensor readings, the flow rate sensor and heater may be adjusted to optimize the operation of the system to detect leaks. Based on the sensor readings, the flow may be adjusted to prevent damage and leaks by relieving the system of excess pressure. Geographic location, occupancy sensors and occupant identifiers are used to control the system to facilitate operation and minimize leak damage when occupants are away.

The present invention includes an apparatus for determining and/or monitoring a process variable, especially the temperature, or the flow, of a medium in a containment, including a temperature sensor for registering temperature and a flexible, a heat insulating support element, which is arrangeable on an outer surface of a wall of the containment, wherein the temperature sensor is secured to the support element.

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

A thermal, flow measuring device for determining and/or monitoring a mass flow of a measured medium, comprising a sensor element (1, 11, 21) having a measuring tube (2, 12, 22) with a tube wall (7, 17, 27) and with at least a first and a second temperature sensor element, which are especially embodied as resistance thermometers (3, 13, 23, 33), wherein at least one of the temperature sensor elements is heatable, wherein the measuring tube (2, 12, 22) has a longitudinal axis (A) and a tube contour (8, 18, 28) with a first tube cross section in the end regions of the measuring tube (2, 12, 22), wherein the measuring tube (2, 12, 22) includes a narrowing having a second tube cross section, which differs in form and/or area from the first tube cross section, wherein the narrowing is divided into at least two segments (6, 16, 26), wherein at least one of the segments (6, 16, 26) is angled relative to the longitudinal axis (A) of the measuring tube (2, 12, 22) by an angle (α) of at least 5° and wherein, in each case, one of the temperature sensor elements is arranged in a respective one of the two segments (6, 16, 26) externally on the tube wall (7, 17, 27) of the measuring tube (2, 12, 22) and is located in thermal contact with the measured medium.

A system and method of estimating a flow rate through a pipe using thermodynamics. The flow rates are estimated by using fluid properties, reservoir properties, pump properties, and heat transfer properties. Additionally, historical well data can be used to create a model that is used to estimate flow rate through a pipe.

The present disclosure provides an air flow rate measuring including a casing and a sensor. The casing includes a main-bypass passage that defines an inlet and an outlet, a sub-bypass passage that branches off from the main-bypass passage at a branching area, and a guiding wall that changes, at a position upstream of the branching area, a flow direction of the passing air taken in from the inlet. The inlet and the guiding wall are arranged in an arranging direction along a flow direction of the intake air in the duct. The guiding wall includes an inlet side surface that faces the inlet and is not perpendicular to the arranging direction.

The disclosed embodiments include a wireless restrictor that may be used as a laminar flow element in a flow meter or a mass flow controller. Embodiments of the wireless restrictor include a single machined part that contains both the features of a tapered restrictor and crushable positioning protrusions.