The FlowBar-8(tm) is a multi-channel mass flow meter designed primarily for push mode respirometry applications. It solves the problem of providing accurately measured mass flow rates to multiple locations, such as respirometer chambers in a multi-animal system. Mass flow rates are automatically compensated for temperature and pressure, and yield STP flow rates without further calculation. Flow rates are set with precision needle valves. The FlowBar is available with eight or four channels.

Each linearized mass flow meter is individually calibrated from 10 to 2000 ml/minute using over 100 data points. All flow rates are visible simultaneously on the 4-line display. Voltages proportional to mass flow rates are available from BNC connectors. The FlowBar can also eavesdrop on signals from our flow multiplexer, selecting the flow rate corresponding to the selected flow channel. A serial flow rate output is also available.

The input gas flow can be from any source, such as a pump, gas cylinder or compressor. An optional internal pump with variable drive is available.

Each meter can be individually re-calibrated by the user, if desired. The FlowBar is unique in its combination of functionality and accuracy.  

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