The invention relates to a method for measuring the flow rate of cooling air in a cooling air circuit (13) of a casing (121) of a high-pressure turbine (9) of a turbomachine (1). The invention is characterised in that sensors (21, 22, 24, 26, 28) are used to measure a total pressure at the fan inlet, a static pressure at the outlet of the high-pressure compressor (6), a rotational speed of the low-pressure shaft (101), a rotational speed of the high-pressure shaft (91) and a degree of valve opening of the cooling air circuit (13), a calculation unit is used to calculate the flow rate of cooling air on the basis of at least the measurement of these.

There are equipped: gas meter; and center device including analyzer to analyze a cause of a determination of abnormality. Center device requests analysis-use data necessary to analyze the cause of the determination of abnormality from gas meter, through a communication by center communication unit, based on the abnormality type data received from gas meter. Gas meter transmits the analysis-use data requested from center device to center device by meter communication unit, and analyzer of center device determines the cause of the determination of abnormality based on the received analysis-use data.

Gas meters including a first portion and a second portion are provided. The first portion is separate and distinct from the second portion and a physical barrier is positioned between the first portion and the second portion. The first portion includes at least a motor associated with a shut-off valve for the gas meter and the second portion includes at least an area for a gas stream to flow through. Related gas regulating devices are also provided herein.

An ultrasonic meter configured to operate in multiple classes is provided including a flowtube having an inlet at a first end and an outlet at a second end, opposite the first end; and first and second face to face transducers, the first transducer being positioned at the first end of the flowtube and the second transducer being positioned at the second end of the flowtube, wherein the first and second face to face transducers are positioned in line with flow through the ultrasonic meter. Related flowtubes are also provided herein.

A gas meter with a rated maximum flow capacity of greater than 3,000 CFH (Cubic Feet per Hour)for example, between 3,500 CFH and 7,000 CFHis provided with 2-inch flange connectors. One or more undercuts are provided in the meter body to promote satisfactory performance in terms of, for example, differential pressures at the meter inlet and outlet.

An air flow hour meter is provided. The air flow hour meter includes a passage configured to receive a pressurized fluid flow therethrough. An obstruction in the passage can be positioned in the fluid flow. A sensor in communication with the fluid flow can be configured to measure a pressure differential of the fluid flow between a first point and a second point of the passage. A microprocessor can be configured to calculate the signal-to-noise ratio of the sensor, and a timer can be configured to activate when the signal-to-noise ratio falls below a predetermined limit and otherwise deactivate.

Methods and systems for mitigating condensation in a sensor module of a combustion appliance are disclosed. In one example, a fluid flow from a main conduit is cooled with a passive heat exchanger. A sensor of a sensor module may be heated to a temperature above the cooled fluid flow. Cooling the incoming fluid flow with a passive heat exchanger and/or heating the downstream flow sensor may help mitigate condensation in the sensor module, and in particular, on the sensor device. This may help increase the reliability of the system.

Provided is a high-pressure gas supplying apparatus that may minimize impact to be exerted on a valve seat in a regulator and may reuse condensate water or gas produced from leaking gas that is gradually discharged to the outside. That is, it is possible to collect and reuse moisture (condensate water) or gas produced by the Joule-Thomson effect from leaking gas that is gradually discharged to the outside by the leaking gas discharge unit.

An electronic flowmeter includes a body defining an interior, an inlet port in communication with the interior, an outlet port in communication with the interior, and a valve selectively adjustable between open and closed positions for communication between the outlet port and the interior. A flow sensor is associated with the valve and sensing a flowrate therethrough, and a digital indicator displays the flowrate sensed by the flow sensor.

Apparatuses for controlling gas flow are important components for delivering process gases for semiconductor fabrication. In one embodiment, a method of calibrating an apparatus for controlling gas flow is disclosed. Specifically, the apparatus may be calibrated on installation using a two-step process of measuring the volume of gas box downstream from the apparatus by flowing nitrogen gas into the gas box and measuring the resulting temperature and rate of pressure rise. Using the computed volume of the gas box, a sweep of several mass flow rates may be performed using the process gas and the gas map for the process gas. The apparatus is calibrated based on the measured temperature and pressure values, which allow calculation of the actual mass flow rate for the process gas as compared with the commanded mass flow rates.