HETEK Solutions Inc

Measuring flow rate using Dye Dilution techniques is a cost effective and accurate method. The methodology is well documented and widely accepted and accuracies of 2% flow rate are typical. Hetek uses a modified procedure based on the ISO constant rate injection method procedure. Flow meters ranging from differential flow meters such as orifice plates and venturi's to weirs, flumes, or magnetic flow tubes can all be calibrated or verified using the Dye Dilution technique. Other areas where Dye Dilution techniques may be used are in chlorine contact time analysis or flow splitting/balancing in waste water treatment plants.

For example: To measure the rate of flow (discharge) of sewer or stream, inject a solution of dye into the sewer at a steady rate of one milliliter per minute. Downstream, the dye has been diluted by a factor of ten million. Conclusion: the stream has a flow rate of ten million milliliters per minute, or 600 cubic feet per hour. As is evident from the example, it is only necessary to know the dilution factor or the concentration downstream relative to that of the injected dye. Knowing the exact concentration of the injected dye and downstream dye is non-important.