Abstract: Reactor plant and process for culturing phototropic microorganisms with a reactor vessel and a photosynthetic module, which are connected with one another in a circulation circuit by a pump and can be controlled via a control unit, where in the circulation circuit or in the reactor vessel, a homogenizer is provided, where a light-intensity control of the photosynthetic module is provided, and where a bypass of the circulation circuit or of the reactor vessel with a filter device which is arranged externally of the reactor vessel for separating off extracellular products during the fermentation is provided.

Abstract: Disclosed are a method and a device for the biotechnological production of valuable products, in which a medium is fed to a bioreactor and is subjected to a fermentation process, the valuable product is gathered as a filtered permeate and/or concentrated retentate via a cross-flow filtration system that is mounted downstream thereof, and residues are once again fed to the bioreactor until being gathered as a retentate. Other materials can be fed to the bioreactor in a controlled manner in addition to the medium while the concentrated retentate and permeate can be gathered in a controlled manner. The fermentation process and the filtration process are regulated in a synchronized manner in an integrated system via a digital control unit.

Abstract: The invention comprises a membrane and device and method for removing proteases from fluids, particularly from biological fluids and pharmaceutical solutions, which uses a microporous membrane body, whereby inhibitors that selectively bind proteases are coupled to the membrane body by chemically activated groups.

Abstract: The invention comprises a membrane and device and method for removing proteases from fluids, particularly from biological fluids and pharmaceutical solutions, which uses a microporous membrane body, whereby inhibitors that selectively bind proteases are coupled to the membrane body by chemically activated groups.

Abstract: An electronic scale having a measuring sensor (1 . . . 16), a digital signal processing unit (18), a digital display (19), a bubble level (20), which includes a container (21) that is partially filled with a liquid (22) while forming a gas bubble (23), and circuit component or program routine in the digital signal processing unit (18) for detecting a displacement of the gas bubble (23). An additional circuit component or program routine detects the diameter of the gas bubble (23). The diameter of the gas bubble changes due to vertical vibrations of the scale. The signal from the measuring sensor (1 . . . 16) falsified by vibrations can thus be corrected by the digital signal processing unit (18) by calculation, making use of the diameter signal.

Abstract: A current-limiting circuit (100), which limits an electrical current from a voltage source to a consumer to a predetermined maximum current. A measuring resistor (110) is coupled into a current lead (103) between a circuit input (102) and a circuit output (104). A transistor (106) of the circuit is coupled into the current lead (103) with its collector-emitter path in series with the measuring resistor (110), and its base is connected to the current lead (103) through a series resistor (108). A shunt regulator (116) of the circuit has an anode, a reference input and a cathode, wherein the cathode is connected to the base of the transistor (106), and the anode and the reference input form a voltage tap across the measuring resistor (110).

Abstract: An electronic scale having a measuring sensor (1 . . . 16), a digital signal processing unit (18), a digital display (19) and an inclinometer (40). The inclinometer derives a signal for the tilt of the scale from the difference of at least two signals. The digital signal processing unit (18) is provided with an additional circuit component or program routine that adds the two signals and, by way of this cumulative signal, corrects the vibration-distorted signal of the measuring sensor (1 . . . 16). A plurality of inclinometers enables the simultaneous detection of momentary gravitational acceleration. For example, in an electric bubble level, the gas bubble moves out of place when tilted and the diameter of the gas bubble changes when the gravitational acceleration changes. The scale thus provides an additional signal for correcting the influence of disturbances with minimum complexity.

Abstract: A top-pan scale with a scale pan which is supported on at least one force transducer (7) of a force measurement system (5) and with a corner load sensor which outputs a signal if the weighing goods are positioned eccentrically on the scale pan. The corner load sensor (10) has a flat underside via which it can be placed on, or attached to, the scale pan or a bottom pan of the scale. The corner load sensor also has a flat upper side on which a scale pan (4) can be placed or attached. The corner load sensor (10) is connected to a positionally fixed electronic processor (22) via a force-feedback-free connection (21). Embodiments of the corner load sensor can therefore be used for a wide variety of scale designs and can be retrofitted easily.

Abstract: Measurement amplification methods and devices for detecting a monopolar input signal (UE) by integrating A/D conversion. Before being digitized, the input signal (UE) is inverted according to the so-called Chopper principle and converted into a bipolar intermediate signal (UZ). A reference voltage (Uref) used in A/D conversion undergoes polarity changes synchronized with the polarity changes of the intermediate signal (UZ). Offset and drift are eliminated by totaling an even number of individual measurements.

Abstract: Measurement amplification methods and devices for detecting the detuning of a measurement bridge (10) to which a bipolar, rectangular supply voltage (Us) is supplied. The methods and devices use integrating A/D conversion and are characterized in that a reference voltage (Uref) used for the A/D conversion undergoes polarity changes synchronized with the polarity changes of the supply voltage (Us). Offset and drift are eliminated by totaling an even number of individual measurements.

Abstract: A weighing scale, e.g. a top-pan scale, having a scale pan (01, 02) supported on a force transducer, and a corner load sensor (03, 04, 06, 08, 09) measuring the tilting of the scale pan (01, 02) relative to the force transducer. The corner load sensor includes a light beam source (03, 04, 06) emitting a first light beam and a second light beam. The first light beam and the second light beam are directed toward a reflecting surface on an underside of an arrangement that includes the scale pan (01, 02). The first light beam and the second light beam are respectively inclined relative to the reflecting surface of the untilted scale pan (01). The corner load sensor (03, 04, 06, 08, 09) of the scale also includes a first optical sensor (08) measuring the first light beam reflected by the reflecting surface. If no corner load exists, a predetermined proportion (12) of the reflected first light beam is directed to the first optical sensor (08).

Abstract: An inclination sensor is provided having a level that has a liquid and a gas bubble under a covering glass in a housing. A light source is arranged above the covering glass. The inclination sensor can be used to determine a direction and degree of an inclination with high accuracy and which is suitable for automatically aligning an apparatus provided with the inclination sensor. An arrangement is provided that has at least two light receivers arranged above the covering glass such that the light that is emitted from the light source and, in the case of a centered gas bubble, is scattered on the surface of the covering glass coming in contact with the gas bubble can be detected by the at least two light receivers. Different quantities of light can be detected by the light receivers when the gas bubble is not centered, and the light source and the light receivers are arranged on a chip substrate.

Abstract: A device for dosing a number of constituents according to a given formula with a scale (1) containing a formula memory. The scale (1) is equipped with a transponder read unit (2), the given formula is storable in a transponder (4) and transmittable to the formula memory with the transponder read unit (2) and the transponder read unit (2) additionally monitors the dosed constituents during the dosing process. The storage containers (6) for the individual constituents are each provided with transponders (7), so that the individual constituents can be identified by the transponder read unit (2). This enables a simple and reliable transmission of the formula data to the formula memory of the scale and monitoring of the dosing process. Furthermore, the scale can be operated in a generally contact-free manner.

Abstract: A weighing system, using the principle of electromagnetic force compensation, which includes a permanent magnet system (14) having an air gap, a shielding cover (12), a coil (13) located inside the air gap, a transmission lever (7) to whose longer lever arm the coil is attached, and upon whose shorter lever arm the weight transferred by the load receiver acts, a position sensor (20, 21, 22) which detects the position of the transmission lever and which is situated in the vicinity of the coil, and a control amplifier (16) for controlling the current passing through the coil. Further, at least one vertical support (25) is connected to the transmission lever in the vicinity of the coil and the position sensor and projects through an opening (27) in the shielding cover. A counterweight (26) is placed on this/these support(s) closely above the shielding cover.

Abstract: A method and an apparatus for dynamically check weighing objects (18a-c) that are guided across a weight-sensitive zone (14) of a weighing device (12) by a conveying mechanism (20a-c). At regular intervals, the weight-sensitive zone (14) supplies individual measured weight values (E1, . . . , En) from which resulting weight values are derived in a digital evaluation unit (16) by calculating mean values. The evaluation unit (16) includes a plurality of cascading mean value filters (24a-e) that have different filter lengths which are varied by a common scaling value in accordance with a spatial dimension of the objects (18a-c).

Abstract: A method and an apparatus for dynamically checking the weight of objects (18a-c) which are guided across a weight-sensitive zone (14) of a weighing device (12) at an adjustable conveying rate by a conveying mechanism (20a-c). At regular intervals, the weight-sensitive zone (14) supplies individual measured weight values (E1, . . . , En) from which resultant weight values are derived in a digital evaluation unit (16) by averaging. The evaluation unit (16) includes a plurality of cascaded averaging filters (24a-e) which have different filter lengths that are varied by a common scaling factor depending on the conveying rate.

Abstract: A precision force transducer having a spring element (1) whose load-dependent deflection is converted into an electrical signal by means of strain gauge elements (10). The spring element (1) is made of a precipitation-hardenable nickel-based alloy with a nickel content in the range of 36 to 60 percent and a chromium content in the range of 15 to 25 percent. The strain gauge elements (10) are composed of a polymer-free layered film system. This makes it possible to produce a precision force transducer that features great accuracy, low creep and low moisture sensitivity.

Abstract: Electronic scales having an integrated computer including a display for presenting information to a user, an input unit for entering selection data by a user, a memory for storing a plurality of activatable profiles as sets of parameter values for assignment to corresponding sets of parameters, and a data processing unit for controlling the display, the input unit, and the memory, and for determining and processing measured values in accordance with the current activated profile. The measured values are generated during a weighing operation by the user. To determine a profile, a user is requested, over a plurality of successive steps, to select one of several options presented by the display, the combination of the options presented in a step being dependent on the selection made in the preceding step. Then, during the weighing operation, the user is requested, again, over a plurality of successive steps, to perform an action presented by the display.