Abstract: A method for calibrating and controlling a pipetting device for metered liquid with a multichannel, automated micrometering unit. All of the channels of the pipetting device are calibrated using a camera which detects the expelled droplets of the liquid, so that the volume thereof can be determined by means of a control device. The method makes it possible to carry out a calibration of the individually dispensed liquid volumes in droplet form to a prescribed volume deviation with a different number of possibly necessary repetitions for each individual channel.

Abstract: A method for calibrating and controlling a pipetting device for metered liquid with a multichannel, automated micrometering unit. All of the channels of the pipetting device are calibrated using a camera which detects the expelled droplets of the liquid, so that the volume thereof can be determined by means of a control device. The method makes it possible to carry out a calibration of the individually dispensed liquid volumes in droplet form to a prescribed volume deviation with a different number of possibly necessary repetitions for each individual channel.

Abstract: 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.

Abstract: 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.

Abstract: A method for leak testing of hand-held piston stroke pipettes and a corresponding leak testing apparatus (1) for performing the method. Essential to the system is a holder (8) for the sealed connection of a pipette tip (3) to the leak-testing apparatus. A line system (9) with connecting sections of the leak-testing apparatus forms a specific connection volume. The pipette tip (3) is evacuated to a measuring pressure below atmospheric pressure. With the vacuum pump (5) disconnected and the connection volume sealed off, the pressure is measured after a specific time interval, and any possible rise in pressure is determined. An indication of the serviceability of the pipette (2) is generated from the pressure rise determined.

Abstract: A bottle top dispenser for handling liquids having a piston-cylinder arrangement in an outside housing. At least one actuating button (49) that can be pressed downwards is arranged on the upper side of the outside housing. The outside housing (2) can be provided with ventilation openings (48) that can be hidden beneath the actuating button (49). The bottle arrangement is also characterized by a specific arrangement of a sensor system (65) in relation to a measuring strip (64) on a piston rod (28). The path measuring signal can be evaluated by means of a magnetoresistive sensor system, especially such a system based on the AMR effect. The arrangement of the measuring strip (64) in relation to the longitudinal central axis of the piston rod (28) is of considerable importance.

Abstract: A method for leak testing of hand-held piston stroke pipettes and a corresponding leak testing apparatus (1) for performing the method. Essential to the system is a holder (8) for the sealed connection of a pipette tip (3) to the leak-testing apparatus. A line system (9) with connecting sections of the leak-testing apparatus forms a specific connection volume. The pipette tip (3) is evacuated to a measuring pressure below atmospheric pressure. With the vacuum pump (5) disconnected and the connection volume sealed off, the pressure is measured after a specific time interval, and any possible rise in pressure is determined. An indication of the serviceability of the pipette (2) is generated from the pressure rise determined.

Abstract: A bottle top dispenser for handling liquids having a piston-cylinder arrangement in an outside housing. At least one actuating button (49) that can be pressed downwards is arranged on the upper side of the outside housing. The outside housing (2) can be provided with ventilation openings (48) that can be hidden beneath the actuating button (49). The bottle arrangement is also characterized by a specific arrangement of a sensor system (65) in relation to a measuring strip (64) on a piston rod (28). The path measuring signal can be evaluated by means of a magnetoresistive sensor system, especially such a system based on the AMR effect. The arrangement of the measuring strip (64) in relation to the longitudinal central axis of the piston rod (28) is of considerable importance.

Abstract: A bottle top dispenser for handling liquids having a piston-cylinder arrangement in an outside housing. At least one actuating button (49) that can be pressed downwards is arranged on the upper side of the outside housing. The outside housing (2) can be provided with ventilation openings (48) that can be hidden beneath the actuating button (49). The bottle arrangement is also characterized by a specific arrangement of a sensor system (65) in relation to a measuring strip (64) on a piston rod (28). The path measuring signal can be evaluated by means of a magnetoresistive sensor system, especially such a system based on the AMR effect. The arrangement of the measuring strip (64) in relation to the longitudinal central axis of the piston rod (28) is of considerable importance.

Abstract: A bottle top dispenser for handling liquids having a piston-cylinder arrangement in an outside housing. At least one actuating button (49) that can be pressed downwards is arranged on the upper side of the outside housing. The outside housing (2) can be provided with ventilation openings (48) that can be hidden beneath the actuating button (49). The bottle arrangement is also characterized by a specific arrangement of a sensor system (65) in relation to a measuring strip (64) on a piston rod (28). The path measuring signal can be evaluated by means of a magnetoresistive sensor system, especially such a system based on the AMR effect. The arrangement of the measuring strip (64) in relation to the longitudinal central axis of the piston rod (28) is of considerable importance.