Abstract: A galvanic oxygen sensor that includes a housing that at least partially contains a cathode, a bismuth anode, and an aqueous electrolyte at least partially surrounding the cathode and the bismuth anode within the housing. The bismuth anode may be substantially free of lead and silver, the aqueous electrolyte may include an alkaline salt and a polyol selected from among glycerol, erythritol, and sorbitol. When oxygen is introduced to the cathode, an electro-chemical reaction between the cathode and the oxygen is initiated to form hydroxide. The polyol reduces passivation of the bismuth anode by limiting formation of the layer of a bismuth oxide on a surface of the bismuth anode, thereby increasing a lifespan of the galvanic oxygen sensor. The cathode comprises a gold catalyst.

Abstract: A lead-free galvanic oxygen sensor having an aqueous electrolyte and a bismuth anode is disclosed. The electrolyte contains a polyol in addition to water and a salt. Surprisingly, a sensor with such an electrolyte has an increased resistance to passivation. The suppressed passivation of the bismuth anode leads to a sensor lifespan, in some instances, of greater than 100 days. The polyol can be added in the amount of between 20% and 30%. The polyol can comprise D-sorbitol, meso-erythritol, or glycerol. In some instances, the polyol in the electrolyte can increase the time until a sudden rise in potential for the sensor, while maintaining a constant current on the bismuth anode, of greater than 14 minutes.

Abstract: A lead-free galvanic oxygen sensor having an aqueous electrolyte and a bismuth anode is disclosed. The electrolyte contains a polyol in addition to water and a salt. Surprisingly, a sensor with such an electrolyte has an increased resistance to passivation. The suppressed passivation of the bismuth anode leads to a sensor lifespan, in some instances, of greater than 100 days. The polyol can be added in the amount of between 20% and 30%. The polyol can comprise D-sorbitol, meso-erythritol, or glycerol. In some instances, the polyol in the electrolyte can increase the time until a sudden rise in potential for the sensor, while maintaining a constant current on the bismuth anode, of greater than 14 minutes.

Abstract: A lead-free galvanic oxygen sensor having an aqueous electrolyte and a bismuth anode is disclosed. The electrolyte contains a polyol in addition to water and a salt. Surprisingly, a sensor with such an electrolyte has an increased resistance to passivation.

Abstract: Disclosed is a cuvette for taking a measurement on a liquid, comprising a monolithic cuvette body with a cavity (4) in the form of a narrow gap that is formed between two at least approximately parallel wall surfaces (15, 16) and is delimited by an inner wall (5, 6, 11) and a drawing edge (2) which is open towards the surroundings and from which the liquid is drawn into the cavity (4) forming a measurement zone (13) under the effect of a capillary force.

Abstract: Disclosed is a cuvette for taking a measurement on a liquid, comprising a monolithic cuvette body with a cavity (4) in the form of a narrow gap that is formed between two at least approximately parallel wall surfaces (15, 16) and is delimited by an inner wall (5, 6, 11) and a drawing edge (2) which is open towards the surroundings and from which the liquid is drawn into the cavity (4) forming a measurement zone (13) under the effect of a capillary force. The cuvette body (1) has a longitudinal axis while the inner wall (2) is provided with longitudinal wall sections (5, 6) that extend from the drawing edge (2) as well as a front area (11) which connects the longitudinal wall sections (5, 6).

Abstract: The invention relates to a measurement apparatus (1) for analysing fluids, comprising a container (3) in the form of a syringe, into which a fluid may be taken in via an intake device (14) through at least one opening (5), and further comprising a sensor (7) which is either integrated in the container wall (9) or is attached to said container wall (9), the sensor(s) (7) being so disposed that it/they can come into contact with the fluid which may be taken up into the cavity (10).