In a weighing sensor for a scale, comprising a base (1), a load receiver (4) jointedly linked to the base (1) by means of a parallelogram linkage, and a lever mechanism having at least two force transmitting levers each having a load arm (14, 23, 28, 35, 39, 46, 54) and an force arm (19, 30, 38), the force transmitting levers (8, 9, 36, 40, 50) being supported by means of supporting joints (17, 24, 29, 37, 42, 48, 55, 60) defining supporting joint pivot points on the base (1), and being arranged one behind the other as seen in the longitudinal direction of the weighing sensor, it is provided that all force transmitting levers (8, 9, 36, 40, 50) are two-sided levers.

A differential measurement circuit (1) is implemented in a balance with electromagnetic force compensation. The circuit receives input from two photo currents (I.sub.1, I.sub.2) generated by photodiodes (D1, D2) and generates an output signal proportional to their difference. A switch (SW) controls the flow of current through a node (K.sub.Δ) to which the two photo currents are directed, by flipping between two states (z.sub.t1, z.sub.t2) within two phases (t.sub.1, t.sub.2) of a time period T. The switch is controlled so a reference current (I.sub.Ref) from a voltage or current source (U.sub.Ref) is superimposed alternatingly within the time phases on one of the two photo currents which continuously flow into the node. The node lies at the input of an integrator (INT) whose integrator signal (s.sub.INT) can be compared in a comparator (CMP) to a cyclically recurring ramp signal (s.sub.RAMP) which conforms to the time period. At the output of the comparator, a rectangular-shaped comparator signal (s.sub.PWM) can be generated whose duty cycle ratio is defined by the intersection of the integrator signal with the ramp signal and which can be directed to a control input of the switch.

An article inspection apparatus includes a measuring unit 11 that outputs a measuring signal of weight within a required measurement time from a weight application time, when the weight of an article W is applied, a determination unit 16 that inspects the article W based on the measuring signal, an electromagnetic coil 84 that applies a diagnostic load to the measuring unit 11, and a performance diagnosis unit 18 that causes the diagnostic load to be applied from the electromagnetic coil 84 to the measuring unit 11, within a predetermined diagnosable time longer than the required measurement time from the weight application time, when the weight of the article W is applied to the measuring unit 11, and diagnoses the performance of the measuring unit 11, based on the measuring signal when the diagnostic load is applied.

A weighing sensor is provided for an electronic balance. A weighing unit of the weighing sensor has a load-receiving portion, a fixing portion, and parallel guiding members that connect the load-receiving and fixing portions A lever, with a first end connected to the load-receiving portion, is located between the parallel guiding members and the fixing portion. A lower portion of a photoelectric position limiting block is connected to the fixing portion, and an upper portion thereof has a limiting structure. A tail end portion of a second end of the lever is disposed in the limiting structure, limiting its deviation. The photoelectric position limiting block has a photoelectric position sensor and a stop structure for limiting deviation of the tail end portion.

An integrated high-precision weighing module has a shell, an electromagnetic force sensor, a printed circuit board (PCB), a weighing pan component, a support ring, and an air baffle ring. The electromagnetic force sensor and the PCB are mounted in the shell. A bearing head of the electromagnetic force sensor extends upward from an upper end portion of the shell. The support ring sheathes the bearing head. The weighing pan component is mounted on the bearing head, with the support ring located between the weighing pan component and the shell. The air baffle ring is disposed around the weighing pan component and located on the support ring. A first airflow channel is formed among the shell, the support ring, and the air baffle ring. At least part of airflow in the shell flows to the outside through the first airflow channel.

A brewing guide device is provided. The brewing guide device includes a communication device, a processing device, and a display device. The communication device obtains real-time weight information and real-time time information from an electronic scale. In a first brewing stage, the processing device determines whether the flow rate is higher than, equal to or lower than a first threshold according to the real-time weight information and the real-time time information to generate a first display instruction. According to the first instruction, the display device displays a first water line corresponding to the real-time weight information, a first target line corresponding to the first brewing stage, and a first display pattern corresponding to a first display block below the first target line on a display interface, wherein the level of the first water line is lower than or equal to the first target line.

An integrated high-precision weighing module has a shell, an electromagnetic force sensor, a printed circuit board (PCB), a weighing pan component, a support ring, and an air baffle ring. The electromagnetic force sensor and the PCB are mounted in the shell. A bearing head of the electromagnetic force sensor extends upward from an upper end portion of the shell. The support ring sheathes the bearing head. The weighing pan component is mounted on the bearing head, with the support ring located between the weighing pan component and the shell. The air baffle ring is disposed around the weighing pan component and located on the support ring. A first airflow channel is formed among the shell, the support ring, and the air baffle ring. At least part of airflow in the shell flows to the outside through the first airflow channel.

A brewing guide device is provided having a communication device, a processing device, and a display device. The communication device obtains real-time weight information and real-time time information from an electronic scale. In a first brewing stage, the processing device determines whether the flow rate is higher than, equal to or lower than a first threshold according to the real-time weight information and the real-time time information to generate a first display instruction. According to the first instruction, the display device displays a first water line corresponding to the real-time weight information, a first target line corresponding to the first brewing stage, and a first display pattern corresponding to a first display block below the first target line on a display interface, wherein the level of the first water line is lower than or equal to the first target line.

A machine to fill and weigh containers (100) is described, comprising at least one movement device (18) configured to transport one or more containers (100) between at least two work stations (12) disposed in a work direction (F) which defines a movement path between said at least two work stations (12), wherein along the movement path at least one weighing device (17) is present to acquire the measurement of the mass of said one or more containers (100). A method to weigh the containers (100) is also described, actuated in the machine to fill and weigh containers as above.

Aweigh module with a load-receiving portion, a fixing portion, and a parallel guide portion also has a lever system with a first lever and a second lever. An additional portion of the load-receiving portion extends towards the fixing portion. An extension of the fixing portion extends towards the load-receiving portion. A first end of the first lever is connected by joints to the additional portion and the extension portion. A first end of the second lever is connected by joints to the second end of the first lever and to the extension portion. All joints are of a thin sheet structure. The second end of the second lever is configured for connection to a magnetic system. The weigh module is manufactured integrally. The use of the structure according to the present invention can meet design requirements of large range and small size of sensors.