4 inch bottom connection explosion proof bayonet ring SS case brass internal gauges liquid filled ,which is used forOutdoor and severe ambient and process conditions; Use where harmful vibration and pulsation are present.
4" All stainless steel bottom connection explosion proof electric contact pressure gauges, which is for gaseous, liquid, and corrosive media or corrosive environment
Aluminum body bottom connection explosion proof electric switch pressure gauges, which is for gaseous, liquid, and corrosive media or corrosive environment