8 WIKA operating instructions pressure switch model PSA-31 for sanitary applications
EN
14018458.03 11/2021 EN/DE/FR/ES
2.4 Labelling / safety marks
Product label
If the serial number becomes illegible (e.g. due to mechanical damage or overpainting), traceability will
no longer be possible.
Explanation of symbols
3-A Sanitary Standards, Inc.
This instrument is 3-A marked based on a third party verication for conformance to the 3-A
standard 74-07.
Measuring range
Power supply
P# Product No.
S# Serial No.
Analogue signal Switching output 1
Switching output 2
2. Safety
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