Watson-Marlow qdos H-FLO Reference Manual page 241

2. Determine chemical compatibility of the materials of construction identified in Step
1, using Step 2A and 2B:
Step 2A: For products with a Watson-Marlow product code, use the Watson-
Marlow chemical compatibility guide:
https://www.wmfts.com/en/support/chemical-compatibility-guide/
For items in group 3A: A combined check of the items is undertaken
•
using the pumphead name
Example:
Sodium Hypochlorite, ReNu SEBS (Qdos) = Grade A compatibility
Step 2B: For products not purchased from Watson-Marlow, use supplier
chemical compatibility guides
3. If the item is not chemically compatible, or chemical compatibility cannot be
determined, then either:
Step 3A: Select another material, for example a different pumphead, fluid
connector, or etc.
Step 3B: Reassess the intended operation. For example, replacing the
peristatic tubing or element after a set number of tested revolutions prior to
pumphead failure, to avoid contact with materials of construction which
would not normally be wetted by the fluid path.
241