Labelling / Safety Marks; Risk Of Burns - WIKA switchGauge 821 Manual De Instrucciones

3. Safety

3.7 Labelling / Safety marks

Product label (example)
EN
Switch contact model and switch-
ing function
3.8 Explanation of symbols
8 Operating instructions pressure gauges with switch contact models 821, 851 or 830 E
Pin assignment
Before mounting and commissioning the pressure gauge,
ensure you read the operating instructions!

Risk of burns!

Potentially dangerous situation caused by hot surfaces.
Protective earth
Instruments bearing this mark on the dial are safety pressure gauges
with solid baffle wall per EN 837 (S3).
821 Magnetic snap-action contact, model 821
851 Reed contact, model 851
830 E Electronic contact, model 830 E
Date of manufacture