US 11,860,144 B2
Measuring cell for chemical analyses
Ulrich Kathe, Ludwigsburg (DE); Daniel Schweitzer, Remshalden (DE); and Michael Ingelmann, Vaihingen/Enz (DE)
Assigned to Endress+Hauser Conducta GmbH+Co. KG, Gerlingen (DE)
Filed by Endress+Hauser Conducta GmbH+Co. KG, Gerlingen (DE)
Filed on Sep. 1, 2021, as Appl. No. 17/464,257.
Claims priority of application No. 10 2020 122 826.0 (DE), filed on Sep. 1, 2020.
Prior Publication US 2022/0065831 A1, Mar. 3, 2022
Int. Cl. G01N 31/16 (2006.01); G01K 13/00 (2021.01); G01N 1/44 (2006.01); H05B 3/56 (2006.01)
CPC G01N 31/16 (2013.01) [G01K 13/00 (2013.01); G01N 1/44 (2013.01); H05B 3/56 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A measuring cell for carrying out chemical analyses, having:
a vessel, in which at least one liquid to be analyzed is located,
a heating wire, which is guided at least partially around an outer wall of the vessel, so that the liquid inside the vessel can be heated in a uniform and controlled manner,
a first temperature sensor, which determines and/or monitors a first temperature of the liquid,
a cover for closing the vessel, wherein the cover has a plurality of ducts, wherein at least one first duct is provided for at least one first analysis sensor, which determines and/or monitors at least one chemical and/or physical variable of the liquid of the vessel, wherein at least one second duct is provided for a liquid line, and
a magnetic stirrer with a stir bar, wherein the magnetic stirrer is arranged below the vessel and the stir bar is arranged inside the vessel;
wherein the heating wire is fixed in position using an elastic molded jacket;
wherein a second temperature sensor for determining and/or monitoring a second temperature in the area of the heating wire is provided in the molded jacket of the heating wire, so that it is possible to establish if a maximum permissible value of the second temperature is exceeded.