Abstract: A microbiological testing device (10), comprises a growth medium support plate (12) and a cap (14) attached to the growth medium support plate (12), the growth medium support plate (12) comprising a microbiological testing area (60), wherein the microbiological testing area (60) comprises at least one recess (66) for receiving a microbiological growth medium (62), wherein the least one recess (66) comprises a bottom surface (68) and at least one anchoring element (74) protruding from the bottom surface (68), and wherein the at least one anchoring element (74) comprises an undercut (76) for engaging with the microbiological growth medium (62). Further, a microbiological testing assembly and a cap for the microbiological testing device are described.

Abstract: Nephelometric measuring devices are described. The nephelometric measuring devices can be configured such that an amount of scattered light having different pathlengths impingent upon one or more scattered-light detectors from a beam propagating through a suspension can result in substantially equivalent sensitivity and in correlation between the scattered-light detectors' response and a turbidity value of the suspension. The response of the scattered-light detector(s) receiving scattered light at a nephelometric angle of 85-110° from a beam of light propagating through the suspension can be in accordance to an equation selected from a group of non-linear equations where: x/y=aoxn+ ++a2x2+aix+ao; where “n” is an integer greater than 0; “x” is equal to the turbidity value of the suspension; “y” is equal to the response of the scattered-light detector; and “an” are calibration coefficients.

Abstract: Nephelometric measuring devices are described. The nephelometric measuring devices can be configured such that an amount of scattered light having different pathlengths impingent upon one or more scattered-light detectors from a beam propagating through a suspension can result in substantially equivalent sensitivity and in correlation between the scattered-light detectors' response and a turbidity value of the suspension. The response of the scattered-light detector(s) receiving scattered light at a nephelometric angle of 85-110° from a beam of light propagating through the suspension can be in accordance to an equation selected from a group of non-linear equations where: x/y=anxn+an?1xn?1+ . . . +a2x2+a1x+a0; where “n” is an integer greater than 0; “x” is equal to the turbidity value of the suspension; “y” is equal to the response of the scattered-light detector; and “an” are calibration coefficients.

Abstract: Nephelometric measuring devices are described. The nephelometric measuring devices can be configured such that an amount of scattered light having different pathlengths impingent upon one or more scattered-light detectors from a beam propagating through a suspension can result in substantially equivalent sensitivity and in correlation between the scattered-light detectors' response and a turbidity value of the suspension. The response of the scattered-light detector(s) receiving scattered light at a nephelometric angle of 85-110° from a beam of light propagating through the suspension can be in accordance to an equation selected from a group of non-linear equations where: x/y=anxn+an?1xn?1+ . . . +a2x2+a1x+a0; where “n” is an integer greater than 0; “x” is equal to the turbidity value of the suspension; “y” is equal to the response of the scattered-light detector; and “an” are calibration coefficients.

Abstract: A calibration suspension unit has a container made of a flexible material that is filled with a calibration suspension for the calibration of a turbidity meter. There exists no air supernatant above the calibration suspension in the container. Further, a method for the manufacture of a calibration suspension unit is provided and its use for the calibration of a turbidity meter is described.

Abstract: A calibration suspension unit has a container made of a flexible material that is filled with a calibration suspension for the calibration of a turbidity meter. There exists no air supernatant above the calibration suspension in the container. Further, a method for the manufacture of a calibration suspension unit is provided and its use for the calibration of a turbidity meter is described.

Abstract: The present invention relates to a method for determining the organically bound carbon (TOC) in an apparatus which has at least one reaction zone (2) and at least one detection zone (3), a) the sample being placed into the reaction zone (2) of the apparatus (1), b) the apparatus being sealed, c) the organically bound carbon being converted into gaseous carbon dioxide by means of physical, chemical, biochemical or microbiological methods, d) the gaseous carbon dioxide being transferred to the detection vessel (3, 3a) and e) the carbon dioxide content being determined by means of measurement methods known per se on the basis of the colour change of the indicator, after step a), the inorganic carbon being converted into carbon dioxide and expelled.