Siemens SITRANS P Operating Instructions Manual page 23

Incorrect material for the diaphragm in Zone 0
Risk of explosion in the hazardous area. If operated with intrinsically safe supply devices of
category "ib" or devices of the flameproof enclosure version "Ex d" and simultaneous use in
Zone 0, pressure transmitter explosion protection depends on the tightness of the diaphragm.
● Ensure that the material used for the diaphragm is suitable for the process medium. Refer
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC
WARNING
to the information in the section "Technical data (Page 199)".
Safety information
3.3 Use in hazardous areas
23