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Model 300 - Gas Flow Controllers - Downstream-referenced fixed span flow controller

The Model 300 maintains a constant flow rate as long as the outlet pressure remains constant. (Most users allow the gas to be released at atmospheric pressure.) While the supply pressure might fluctuate from variations in sampling pressure or from chemical reactions taking place, the flow rate remains stable.

The Model 300 will accurately maintain the set flow rate in spite of fluctuating upstream pressure - even if the fluctation is to within 7.5 psi of the outlet pressure. When the flow controller is equipped with the optional Spectrol digital dial, settings are reproducible to better than 1%. The maximum flow rate available is 1.6 L/min with ambient downstream pressure.

NOTE: With all our flow controllers, the inlet pressure must exceed the outlet pressure by 10 psi.