Honeywell SmartLine ST 700 User Manual page 263

Conditions of Use for Ex Equipment, "Hazardous Location Equipment" or "Schedule of
6.
Limitations":
Painted surface of the ST700/ST800 may store electrostatic charge and become a source of ignition in
applications with a low relative humidity less than approximately30% relative humidity where the painted
surface is relatively free of surface contamination such as dirt, dust or oil. Cleaning of the painted surface
should only be done with a damp cloth.
Revision 12
ST 700 SmartLine Pressure Transmitters User's Manual
Page 247