TRACOM offers all major flume types for open channel flow monitoring. Each flume has its own advantages and disadvantages, and it is recommended that before selecting a flume that the characteristics of each flume be considered. Two of the seven flumes we have available are listed below.


  • Most widely used type of flume for permanent installations
  • Standard design conforms to U.S. Department of the Interior, Bureau of Reclamation, Water Measurement Manual
  • Available in throat widths of 1” to 180”
  • Resistant to the effects of submergence
    • 50% for 1″ – 3″ flumes
    • 60% for 6″ and 9″ flumes
    • 70% for 12″ – 96″ flumes
    • 80% for 120″ flumes
  • Self-cleaning in most circumstances (not recommend for sanitary use in 1” and 2” sizes)
  • Available in nested configurations
  • Available with end adapters to connect to existing pipe
  • Simple flow meter calibration
  • Maximum flow rates from 85.3 GPM – 467,200 GPM with standard wall heights
  • Installation requires drop in conduit invert from inlet to outlet


  • Standard design conforms to U.S. Department of Agriculture, Field Manual for Research in Agricultural Hydrology
  • Available in a wide range of sizes from 0.4’ HS – 4.0’ HL
  • Developed for agricultural runoff
  • Approach section and inlet bulkhead available for connection to existing pipe
  • Simple flow meter calibration
  • Flat bottom for self-cleaning of small debris
  • Wide range of flows
  • Maximum flow rates from 36.0 GPM – 52,509.6 GPM
  • Discharge must be unimpeded or spill freely from flume
  • Cannot operate under submerged conditions
  • Require 3-5 times the maximum head in straight channel upstream of the flume