Thermal insulation casing for analyzer

An analyzer, comprising:

• a first liquid chamber configured to store a first reagent for use by the analyzer in analyzing a sample;
• a second liquid chamber configured to store a second reagent for use by the analyzer in analyzing the sample;
• a heating element configured to heat the first and second reagents within the first and second liquid chambers;
• a reaction cuvette;
• a heat preservation shell comprising side walls and a cover plate forming an enclosure for said liquid chambers, wherein the heat preservation shell comprises at least one first fluid passage operably connected to the first liquid chamber and configured to convey the first reagent from the first liquid chamber to a reaction cuvette, and at least one second fluid passage operably connected to the second liquid chamber and configured to convey the second reagent from the second liquid chamber to the reaction cuvette, the first and second fluid passages configured as hollow passages in the heat preservation shell,
• wherein the at least one first fluid passage is arranged within the side walls or cover plate of the heat preservation shell along a first axis and the at least one second fluid passage is arranged within the side walls or cover plate of the heat preservation shell along a second axis, wherein the first axis lies in a first plane and the second axis lies in a second plane that is parallel to the first plane such that the at least one first fluid passages and the at least one second fluid passages are spatially staggered within the side walls or cover plate of the heat preservation shell, and wherein the heat preservation shell maintains the temperature of the first and second reagents received from the first and second liquid chambers as the reagents traverse the first and second fluid passages to the reaction cuvette.