Provides a preset, fixed flow to instruments forcalibration. The inlet pressure is configurable from 250 psig to 3000 psig. The gas outlet is configurable from 0.25 slpm to 6 slpm. Included is an easy-to-read pressure gauge and easy on/off control valve.

Provides the correct gas flow to instruments that have internal pumps. Typical activation suction is from 0 to 3 inches of water column. The DFR can be configured for inlet pressures ranging from 250 psig up to 3000 psig.

Maintains a constant flow rate to help ensure accurate monitor calibrations even as cylinder pressure drops. N.I.S.T traceable and easy to operate.