40 78 00 Panel Mounted Instruments
40 78 56 Isolators, Intrinsically-Safe Barriers, and Surge Suppressors
40 78 13Indicators and Meters40 78 16Indicating Lights40 78 19Switches and Push Buttons40 78 23Potentiometers and Manual Controllers40 78 26Chart Recorders40 78 33Annunciators40 78 43Single-Loop Controllers40 78 53Relays40 78 56Isolators, Intrinsically-Safe Barriers, and Surge Suppressors40 78 59Power Supplies40 78 63Alarm Dialers