A system for dividing a single flow of gas into two or more secondary flows of known, precise values, without requiring a high upstream pressure. The system includes an inlet for receiving the single gas flow, and first and second flow lines connected to the inlet. A mass flow meter measures gas flow...http://www.google.com.au/patents/US6418954?utm_source=gb-gplus-sharePatent US6418954 - System and method for dividing flow
