Designed for use where dangerous gases and vapors may exist, differential pressure gauges and flowmeters have a Class 1, Division 2 (Group B, C and D atmospheres) rating. A Division 2 rating means the differential pressure gauges and flowmeters can be operated in atmospheres where hazardous concentrations of flammable gases or vapors exist only because of accidental rupture or breakdown of equipment. The devices offer operating ranges from 5" of water to 1,000 psi differential pressure and from 0 to 10 gal/min flow.
Orange Research Inc.
Differential Pressure Gauges and Flowmeters
March 1, 2005