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The dispensing system dispenses the reagents and the samples in the methacrylate rotor (1). The optical system
measures the absorbance directly on the rotor wells. The aluminium heating canal (2) surrounds the rotor and keeps
it at 37ºC. The canal is thermally insulated from the exterior by means of the moulded expanded polystyrene insula-
tion (3). The Peltier cells (4), with their respective radiators (5) and fans, act on the canal to control the temperature.
The sensor used to control the temperature is the probe (7). The methacrylate rotor is fastened to its centring unit
(8) by means of the screw (9). The centring unit is xed to the heating canal through the axis (22), which is tted on
bearings (11). The barrier obstructing the photosensor (10) when the rotor reaches its start position forms part of
the centring unit (8). The centring unit also acts as gearing. The pinion (12), xed to the motor (13), acts through the
crown (14), which also acts as a centring unit. The separator (15) does not allow the motor temperature to reach
the heating canal. The electronic board of the photometric system (16) is housed in a cavity in the heating canal.
The upper cover of this cavity (17) supports the electronic board. The seal (18) keeps the cavity hermetically closed
in the case of possible liquid spillage. The housing of the lter drum is closed at the bottom by the cover (18). The
part (19) centres the photodiode with regard to the lighting system and also acts as a grill to prevent the incidence of
unwanted light. The grill (20) limits the light hitting the reactions rotor. The detector (21) tells the analyzer if the rotor
cover is in position or not.
2
3
9
1
11
8
22
7
13
14
16
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