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2 Construction of the 807 Dosing Unit
807 Dosing Unit
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7
3
Housing
With data chip, coding magnets, locking
button and specifications concerning the
dosing unit.
Material: PETG or PVDF
4
Centering tube
Is actuated by Dosino and rotates the entire
inner cylinder unit, together with dosing cyl-
inder, cylinder base and the integrated valve
disc.
Material: PETG or PVDF
5
Spring clip
Material: PETG or PVDF
6
Dosing cylinder
Contains the solution for dosing. Volume
2 mL , 5 mL , 10 mL , 20 mL or 50 mL .
Material: Borosilicate 3.3 or ETFE
7
Cylinder base
Seals the dosing cylinder and contains the
valve disc.
Material: PTFE / Graphite
8
Valve disc
A hole in the valve disc guides the solution
into one (of four) selected openings in the
distributor disc.
Material: Silicone carbide ceramic
9
Distributor disc
The four holes in the distributor disc each
set up a connection with one of the four
ports (input/output) of the dosing unit.
Material: Al
2
O
3
ceramic
10
Distributor
Contains four ports (input/output) for solu-
tions. The ports are actuated by the distribu-
tor disc in the distributor and the valve disc
in the base of the cylinder.
Material: ETFE
11
Fixing ring
For fastening the dosing unit onto a reagent
bottle.
Material: PVDF
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