An open unit housing is configured for removably and rotatably mounting therein at least a dosage feeder of a dosaging apparatus for dosaging a particulate chemical material when mounted above a body of a liquid material, with an interior of the open unit housing being exposed to ambient conditions. The open unit housing comprises a housing body portion having an interior surface defining a cavity exposed to ambient conditions and having an inlet opening facing upwardly for receiving the chemical material from an external source, and an outlet opening for disposing therethrough dosages of the chemical material. The housing body portion has a front end and an axially opposite rear end, the front and rear ends having inner surfaces that bound the cavity. The rear end has a rear opening configured to allow removable mounting of the dosage feeder therethrough into the cavity, and the front end has a front opening configured to allow a front moving member of the dosage feeder to extend therethrough to be connected to a driving member of the apparatus.

An open unit housing is configured for removably and rotatably mounting therein at least a dosage feeder of a dosaging apparatus for dosaging a particulate chemical material when mounted above a body of a liquid material, with an interior of the open unit housing being exposed to ambient conditions. The open unit housing comprises a housing body portion having an interior surface defining a cavity exposed to ambient conditions and having an inlet opening facing upwardly for receiving the chemical material from an external source, and an outlet opening for disposing therethrough dosages of the chemical material. The housing body portion has a front end and an axially opposite rear end, the front and rear ends having inner surfaces that bound the cavity. The rear end has a rear opening configured to allow removable mounting of the dosage feeder therethrough into the cavity, and the front end has a front opening configured to allow a front moving member of the dosage feeder to extend therethrough to be connected to a driving member of the apparatus.

Embodiments of the present disclosure disclose a method and associated device for determining when an air filter needs replaced in an electronic device. The method comprises measuring the power needed to produce a predetermined output in a fan or related device that receives air through the air filter and comparing the measured power to previous measurements. When the amount of power needed is greater than a threshold, a dirty filter message or alert is produced.

A gas meter structure includes a box-shaped body, an inlet mouth and an outlet mouth suited to allow the passage of a gas flow and defined on the box-shaped body, wherein inside the box-shaped body there are a metering device suited to measure one or more parameters for the determination of the gas flow rate, and a filter suited to filter the gas flow. The filter comprises a dust deposit chamber for the dust present in the gas flowing in, the dust deposit chamber having an inlet opening communicating with the inlet mouth of the box-shaped body, a dust collection bottom and a filtering outlet wall provided with through openings; the dust deposit chamber is configured in such a way that the gas flows into it through the inlet opening and flows out of it through the through openings of the filtering outlet wall.

Provided is an apparatus for dosaging a particulate material. The particulate material includes, at least in operation, a cavity having an inlet opening facing upwardly for receiving the material from an external source, an outlet opening facing downwardly, for disposing therethrough dosages of the material and a dosage feeder located inside the cavity and having at least one dosage recess.

Provided is an apparatus for dosaging a particulate material. The particulate material includes, at least in operation, a cavity having an inlet opening facing upwardly for receiving the material from an external source, an outlet opening facing downwardly, for disposing therethrough dosages of the material and a dosage feeder located inside the cavity and having at least one dosage recess.

Metering equipment (A) for food products, including metering means (Di) defined by plunger means (Pi) and nozzle dispenser means (Ui) connected to said plunger-cylinder means (Ci, Pi) and suitable for dispensing volumetric quantities of said product; many-ways-valve distributing means (Vi) connected to said plunger-cylinder means (Ci, Pi) and to said nozzle dispenser means (Ui) placed in-between; said valve means (Vi) are being formed by a shaft (K) provided with a series of pass-through holes and suitable for turning around an own central lengthwise axis (X) inside the cylinder (Z) casing and for translating in a horizontal direction parallel to said central axis (X).

Metering equipment (A) for food products, including metering means (Di) defined by plunger means (Pi) and nozzle dispenser means (Ui) connected to said plunger-cylinder means (Ci, Pi) and suitable for dispensing volumetric quantities of said product; many-ways-valve distributing means (Vi) connected to said plunger-cylinder means (Ci, Pi) and to said nozzle dispenser means (Ui) placed in-between; said valve means (Vi) are being formed by a shaft (K) provided with a series of pass-through holes and suitable for turning around an own central lengthwise axis (X) inside the cylinder (Z) casing and for translating in a horizontal direction parallel to said central axis (X).

Embodiments provide a fluid metering device, including: a first fluid supply port for receiving a first fluid; a first fluid dispense port for dispensing the first fluid; a second fluid supply port for receiving a second fluid; a second fluid dispense port for dispensing the second fluid; a waste discharge port for discharging a mixture of the first fluid and the second fluid; a valve assembly including a plurality of valves; a manifold connected to the metering pump, wherein the manifold includes a plurality of fluid channels, and the manifold is used for communicating between the valve assembly and each port; a first tube connected between the second valve and the third valve for accommodating the mixture or the first fluid; and a second tube connected between the third valve and the fourth valve for accommodating the second fluid.

Embodiments provide a fluid metering device, including: a first fluid supply port for receiving a first fluid; a first fluid dispense port for dispensing the first fluid; a second fluid supply port for receiving a second fluid; a second fluid dispense port for dispensing the second fluid; a waste discharge port for discharging a mixture of the first fluid and the second fluid; a valve assembly including a plurality of valves; a manifold connected to the metering pump, wherein the manifold includes a plurality of fluid channels, and the manifold is used for communicating between the valve assembly and each port; a first tube connected between the second valve and the third valve for accommodating the mixture or the first fluid; and a second tube connected between the third valve and the fourth valve for accommodating the second fluid.