A method is for producing individual dosing quantities of a powdered product via a drum dosing device. Individual masses of multiple ejected dosing quantities are sequentially determined. A mass mean value is formed and compared to a predetermined inner target mass range. If the mass mean value is inside the range, the level of the partial vacuum acting on the dosing opening in the filling position remains unchanged, and the above formation of a mass mean value begins anew. If the mass mean value is outside the range, an adapted partial vacuum is ascertained such that in the case of excessively low mass mean value, the level of the partial vacuum is increased, and in the case of excessively high mass mean value, the level of the partial vacuum is decreased. The adapted partial vacuum is applied to the dosing opening in the filling position.

To provide an MFC capable of improving an S/N ratio of a sensor signal even when a pressure difference between both sides of the MFC is small and a flow rate in the sensor flow path is low. Provided is a mass flow controller including a fluid flow path that allows a fluid to pass therethrough, a plurality of flow sensor units that measure a mass flow rate of the fluid, an adjusting valve that adjusts a flow rate of the fluid passing through the fluid flow path, and a control unit that controls a degree of open of the adjusting valve. The flow sensor units are each a thermal flow sensor unit. The control unit calculates a mass flow rate from an added output signal obtained by adding the output signals of the plurality of flow sensor units, and controls the degree of open of the adjusting valve.

A method for compensating a measurement deviation of a first scintillator and/or a photodetector of a radiometric fill level measuring device is provided, including detecting, by a second scintillator, radioactive emissions from the second scintillator; transmitting, in response to radioactive emissions, a first light signal from the first scintillator and a second light signal from the second scintillator, the first light signal being different from the second light signal; receiving, by the photodetector, the first light signal from the first scintillator and the second light signal from the second scintillator, and converting the light signals into electrical signals; comparing the electrical signals with deposited reference signals by means of a comparator; and adjusting the gain of the photodetector in response to comparing the electrical signals and stored reference signals. A radiometric fill level measuring device for fill level measurement, for density measurement, and/or for mass flow measurement is also provided.

The design and structure of a smart gas cylinder valve cap coupled with a smart MEMS mass flow meter, an embedded iBeacon or RFID reader and a remote data transmission module, which is capable of formulating an Internet of Things (IoT) system, is demonstrated in the disclosure. The smart gas cylinder cap(s) can be directly used to replace the mechanical valve handwheel or directly attached to the top of the existing mechanical handwheel as a smart data relay, and the cap(s) can either be applied to a single or plural numbers of gas cylinders while the smart gas flow meter shall communicate with the smart gas cap as well as to relay gas consumption data to a designated data center or a cloud which can further interface with the users and suppliers of the gas cylinders. The system is beneficial for many of the existing gas cylinder applications such as construction gas process, medical gas racks, gas cylinders for food and beverage, and gas racks for electronics fabrication, where the gas cylinder status, gas consumption as well as cylinder logistics are critical for the applications.

A computer implemented method for selecting an appropriately sized meter for use in a selected application implemented by a computer processor implementing instructions stored in a non-transient memory is described. The instructions include receiving utility meter data transmitted from a plurality of utility meters, each utility meter being installed at a unique utility monitoring location, identifying incorrectly sized utility meters based on utility meter data for particular utility meters that displays quantization effects, and selecting an appropriate meter based on the identification of the utility meters displaying quantization effects.

A computer implemented method for selecting an appropriately sized meter for use in a selected application implemented by a computer processor implementing instructions stored in a non-transient memory is described. The instructions include receiving utility meter data transmitted from a plurality of utility meters, each utility meter being installed at a unique utility monitoring location, identifying incorrectly sized utility meters based on utility meter data for particular utility meters that displays quantization effects, and selecting an appropriate meter based on the identification of the utility meters displaying quantization effects.

An assembly for measuring metal powder material mass flow rate during direct metal deposition is disclosed. A detection strip is placed in the gas-blown metal powder material flow path. The detection strip is fixed in one end and suspended at the other end. The flowing metal powder material particles induce displacement to the detection strip. A displacement measurement sensor measures the amount of displacement of the detection strip. The amount of displacement of the detection strip gives relationship to the amount of the metal powder material flowing in the metal powder material flow path. Preferably, the detection strip and the sensor are enclosed in a housing with a metal powder material inlet port and metal powder material outlet port and includes internal features for smooth travel of metal powder material particles.

An assembly for measuring metal powder material mass flow rate during direct metal deposition is disclosed. A detection strip is placed in the gas-blown metal powder material flow path. The detection strip is fixed in one end and suspended at the other end. The flowing metal powder material particles induce displacement to the detection strip. A displacement measurement sensor measures the amount of displacement of the detection strip. The amount of displacement of the detection strip gives relationship to the amount of the metal powder material flowing in the metal powder material flow path. Preferably, the detection strip and the sensor are enclosed in a housing with a metal powder material inlet port and metal powder material outlet port and includes internal features for smooth travel of metal powder material particles.

In some examples, a mass airflow sensor apparatus includes a housing having a tubular bore for passage of air, with an airflow sensor disposed at least partially within the tubular bore. The airflow sensor may be configured to measure a flow rate of air flowing past the airflow sensor. A focus component may be disposed upstream of the mass airflow sensor, the focus component including a cylindrical tubular focus member suspended within the bore. Further, a nozzle may be disposed upstream of the focus component. The nozzle may include a conical inner surface angled toward a center of the bore. In addition, a grid component may be disposed upstream of the focus component. The grid component may include a mesh grid including a plurality of openings for smoothing a flow of air flowing toward the airflow sensor.

In some examples, a mass airflow sensor apparatus includes a housing having a tubular bore for passage of air, with an airflow sensor disposed at least partially within the tubular bore. The airflow sensor may be configured to measure a flow rate of air flowing past the airflow sensor. A focus component may be disposed upstream of the mass airflow sensor, the focus component including a cylindrical tubular focus member suspended within the bore. Further, a nozzle may be disposed upstream of the focus component. The nozzle may include a conical inner surface angled toward a center of the bore. In addition, a grid component may be disposed upstream of the focus component. The grid component may include a mesh grid including a plurality of openings for smoothing a flow of air flowing toward the airflow sensor.