Maintenance
Cleanfit CPA875
26
Hauser
5.3
Cleaning agent
The choice of cleaning agent depends on the degree and type of contamination. The most
common types of contamination and the appropriate cleaning agents can be found in the
following table.
CAUTION
!
Health hazard due to solvents
‣
Do not use any halogen-containing, organic solvents or acetone. These solvents may
destroy plastic components of the sensor and are also suspected of causing cancer (e.g.
chloroform).
Type of contamination
Cleaning agent
Grease and oils
Hot water or tempered, surfactant-containing (alkaline)
media
1)
or water-soluble organic solvents (e.g. ethanol)
1)
do not use with Tophit ISFET sensor! Instead use the usual commercially available acidic cleaning agents for
the food industry (e.g. P3-horolith CIP, P3-horolith FL, P3-oxonia active).
Limescale, metal hydroxide coatings, sparingly
soluble biofilms
approx. 3% hydrochloric acid
Sulfide deposits
Mixture of 3% hydrochloric acid and thiocarbamide
(commercially available)
Protein-based coatings
Mixture of 3% hydrochloric acid and pepsin (commercially
available)
Fibers, suspended solids
Pressurized water, possibly surfactants
Thin biofilms
Pressurized water