General Catalog

Automation in titration
Peristaltic pumps
Titration often requires the transfer of liquids. With
automation in particular, the aspiration of the titrated
sample solution is very convenient. After the preprogrammed
rinsing and aspiration cycles have been
carried out automatically, the sample beaker and
electrodes are immediately ready for the next determination.
The waste is transferred to a canister for convenient
disposal. A membrane pump cannot be used
with liquids that contain solids such as precipitated
silver chloride.
Organic solvents represent a particularly critical
medium. In this case the chemical resistance of the
pump components limits the working range of the
pump. This is not the case with the 772 Pump Unit
because the user has the possibility of using tubing
made from different materials and can thus select tubing
whose resistance is suitable for the medium to be
pumped. The Pump Unit comes with with one piece of
tubing for aqueous media and another one for organic
solvents as standard.
Ordering information
2.772.0110 772 Pump Unit
2.772.0120 772 Pump Unit «Aspirate»
2.772.0130 772 Pump Unit «Rinse»
2.772.0210 Pump Unit to 731/824
2.772.0220 Pump Unit to 731/824: Aspirate
2.772.0230 Pump Unit to 731/824: Rinse
2.843.0120 843 Pump Station (Peristaltic)
2.843.0130 843 Pump Station (Peristaltic) –
Rinse / Aspirate
The 843 Pump Station (Peristaltic) has two built-in
peristaltic pumps. These can be controlled either via
the interface by remote signals or manually by pressing
keys.
Both instruments are available in several versions; these
mainly differ in the accessories supplied with them.
843 Pump Station (Peristaltic)
19 — AT