Ammonia Pressure gauge for ammonia conditions black steel case and bezel, stainless steel internal, steel connection. ... connectionDiaphragm:SS316L, PTFE or Tantalum availableCase:304 polished SS case welded with the socketBezel:304 polished stainless steel bayonet ... , kpa, mpa, bar, kg/cm2) availableAccuracy:+/- 1.6 % full scaleCase Fill:Food grade glycerin standardActuating Fill:Food grade glycerin ...