Chemical analysis apparatus

A chemical analysis apparatus provided with an incubator having a plurality of housing compartments for respectively housing a chemical analysis slide having a reagent layer with a substance, which is to be measured, applied thereon, and for incubating the chemical analysis slide, and a read-out head moveable along said housing compartments to stand facing the reagent layer of the chemical analysis slide housed in one of said housing compartments via a read-out opening formed in each of the housing compartments, thereby to emit measuring light to the reagent layer and to measure optical density of light reflected by the reagent layer,

• wherein the improvement comprises the provision of:
• i) a temperature-controlled chamber for housing said incubator therein,
• ii) a first temperature adjustment means provided with a heater and a temperature sensor secured to said incubator, thereby to maintain the temperature in each of said housing compartments at a predetermined value,
• iii) a second temperature adjustment means provided with a heater disposed in said temperature-controlled chamber and a temperature sensor secured to said read-out head, said temperature sensor generating a temperature detection signal, thereby to maintain the temperature in said temperature-controlled chamber at said predetermined value, and
• further comprising means for calculating a mean value of a plurality of sampled temperature detection signals equal in number to said plurality of housing compartments, such that temperature control is effected so that a mean temperature represented by said mean value coincides with said predetermined value.