A weighing device includes at least one weight preparation table and a weighing pan functionally connected to a load cell. Where the at least one weight preparation table and the weighing pan are displaceable, plurality in a linear translational displacement, relative to each other in a purely linear translational displacement along at least a horizontal axis and a vertical axis. The at least one weight preparation table is positionable in at least two different positions relative to the weighing pan in the horizontal displacement, including a first position where the at least one weight preparation table is laterally offset from a center of the weighing pan in a vertical view, and a second position where the at least one weight preparation table overlaps the center of the weighing pan in the vertical view. The weighing pan and the at least one preparation table are enclosed within a weighing chamber of the weighing device, where the weighing device restricts any motion of the at least one weight preparation table, and of the weighing pan to within the weighing chamber. Further disclosed are a system comprising the weighing device and a method for weight determination.

A balance has a draft shield provided therefor. The shield has a base with upper and lower base covers (5, 6). The upper cover has a central hole in the middle thereof. A windproof ring is placed above the upper cover around a weighing pan of the balance. A shield (7) that is placed between the upper cover and the lower cover receives a weighing sensor (8) of the balance. A wind shield is placed above the base and a weighing compartment for receiving the weighing pan is placed between the wind shield and the upper cover. The windproof structure also has an isolation baffle (2) that is placed between the weighing pan and the upper cover. The high-accuracy balance of the present invention may effectively prevent air flow disturbances inside the balance.

A balance (30) is a single unit with a weighing pan (21) enclosed in a weighing compartment (22). A housing (23) adjoins the weighing compartment. The balance housing contains a weighing cell compartment (24) enclosing a weighing cell, an electronics compartment (25) containing electrical and electronic circuit elements, a thermoelectric heat pump module (27) and a heat flow controller (28). The balance is equipped to determine a net heat flow (P.sub.net) inside the housing in the direction from the weighing cell compartment to the electronics compartment. The heat flow controller uses the net heat flow as a control input to regulate the the thermoelectric heat pump module, arranged inside the housing. The control input is used to generate an active heat flow (P.sub.A) with magnitude and direction for holding the net heat flow at a level equal to the rate of heat dissipation produced inside the weighing cell compartment.

A weighing fume cupboard (1) for weighing pharmaceutically active or toxic substances in a laboratory, comprising a housing (10) which defines a working space (19), wherein a front side of the housing (10) has a working opening (11) which is open at all times during intended use of the weighing fume cupboard (1), a working plate (20) which delimits the working space (19) at the bottom side, an armrest (40) in the region of the working opening (11), and a support (30) which bears the weight of the housing (10), of the working plate (20) and of the armrest (40), wherein, during intended use of the weighing fume cupboard, the working plate (20) is decoupled in terms of shocks and vibrations from the housing (10), from the armrest (40) and from the support (30).

The invention relates to a weighing fume cupboard (1) for weighing pharmaceutically effective or toxic substances in a laboratory, comprising: a housing (10) having a front wall (14), side walls (15) and a rear wall (16) defining a working chamber (19), wherein the front wall (14) of the housing has a working opening (11) that is constantly open during intended use of the weighing fume cupboard (1); a working plate (20) that delimits the working chamber (19) at the base side; and armrest (40) arranged on a front edge of the working plate (20) in the region of the working opening (11) and at a distance from the working plate (20); and a carrier (30) that carries the weight of the housing (10), the working plate (20) and the armrest (40), wherein the armrest (40) extends along the longitudinal direction thereof substantially over the entire width of the weighing fume cupboard (1) and has end sides, and wherein a respective side wall (15), a respective end side of the armrest (40) and the carrier (30) are connected to a corner profile (50) formed as a single part.

A housing for a laboratory device, having floor, ceiling, rear, side, and front walls, which together form an operating chamber, wherein the front wall is movable upward and downward between a lowered closed position and a raised open position in a linear and simultaneously pivoting manner and, in the open position of the front wall, the operating chamber is open on the front side of the housing. The top wall section having top and bottom wall sections connected about a first pivot axis and transitions in an arc shape to a plate-shaped connection section extending at an angle to the top wall section, or is connected thereto in an angularly rigid manner, and a connection section is hinged in a pivoting manner to the ceiling on the edge thereof distant from the top wall section parallel to the first pivot axis, at a distance from the front wall.

The invention relates to a weighing take-off (1) for weighing pharmaceutically active or toxic substances in a laboratory, comprising a housing (10), which defines a working space (19), wherein a front side of the housing (10) has a working opening (11) that is always open during proper use of the weighing take-off, a working plate (20), which bounds the working space (19) at the bottom, and an arm rest (40), which is arranged on a front edge of the working plate (20) in the region of the working opening (11), wherein a control panel (42) is integrated in the arm rest (40) in such a way that a surface of the arm rest (40) facing away from the working plate (20) is flush with a surface of the control panel (42).

A weighing apparatus for a filling line for filling containers of pharmaceutical, medical, food products and the like includes a weighing unit and a suction unit designed to generate a suction air flow directed and adjusted in such a way as to affect in a controllable manner the value of a weight detected by the weighing unit.

A weighing apparatus includes a sample holder (20), a protective housing (14, 16, 18) with an access port (181) and a closure element (26), a reflection sensor (34) with a radiation emitter (37) emitting sensor radiation (38) reflected by a reflecting object (39) and with a radiation receiver (42) receiving a sensor radiation component (40), reflected by the object and a control unit (32), connected to a motorized drive (30) of the closure element and to the reflection sensor, and which controls the motorized drive with a reflection sensor signal, for transferring the closure element between closed and open positions. A differentiating element subjects a sensor primary signal (52) of the reflection sensor to a differentiation. The primary signal depends on a reflection intensity of the reflected radiation component and generates a sensor secondary signal (60). The control unit controls the motorized drive based on the sign of the secondary signal.

A gravimetric measuring system (10) includes a balance (12) with a weighing chamber (22) surrounded by a weighing chamber wall (23, 24, 26, 28); an electromechanical weighing system (181) arranged in a weighing system chamber (18); an electronic control apparatus (36) for controlling the system operation; a cooling apparatus (34), controllable by the control apparatus, for cooling the weighing chamber (22); and a plurality of functional modules (14, 16) that generate heat during operation and are insertable into module receptacles (283) arranged on the weighing chamber wall (28). The module receptacles (283) have device-side thermal interface components (32a) that are thermally connected to the cooling apparatus (34), and the functional modules (14, 16) have corresponding module-side thermal interface components (32b) that, in an inserted state of the respective functional module (14, 16), thermally contact the device-side thermal interface component (32a) of the respectively associated module receptacle (283).