Palmer Bowlus Flumes

The Palmer Bowlus metering flume has been widely used for measuring water and wastewater in open channels or pipelines that are not under any pressure. This flume is normally installed in a “U” shaped channel fed by a pipeline such as storm drains and sewers. This convenient flume requires little redesign or special modification of circular conduits for installation.

Rather than try to make the flow application fit a particular type of flume, we carefully analyze the parameters so we can select an appropriate flume for the application. Options and modifications are available to ensure that the customer’s requirements are fully met, and that additional instruments are easily interfaced with the flumes.


  • Low Head Loss
  • Minimum flow restriction
  • Measurement accuracy
  • Requires little modification
  • Easy to install

Typical Options
Staff Gauge (Available in various widths and markings including flow data)
Stilling Well (Integral or remote, 6”, 8”, 10”, or 12” ID, with or without plug)
Bubbler Tube (Stainless Steel, %ID, Integral to Flume)
Sampler Tube (Stainless Steel, 3/8” ID, Integral to Flume)

Inlet and Outlet End Connection (Integral or Removable)
Pipe Connection (Neoprene Boot or ANSI Pipe Flange Connection)
Special Chemical Resistant Fabrication (pH Range of 1 to 14)
Ultrasonic Transducer Bracket (Fixed at 14” or 24” adjustable)
pH Sensor Cavity (Fabricated to fit most sensors)
Wing Walls and Bulk Heads (Custom Fabricated to meet job requirements)
Nesting Options (Standard or Special Designs)
Energy Absorption Racks (Fixed or Removable)
Standard or Special Depths (Including surge boxes)
Enclosed Flumes (For odor control)
Flume Covers (Grating, Fiber Sheeting, Clear Polycarbonate)
Special Design (Will meet your special project needs)


We are commitment to providing high quality fiberglass products begins at the design stage. We welcome the opportunity to assist you with specs, drawings and budgetary pricing for your fiberglass needs. Can’t find what you are looking for – we are specialized in custom designs?

PB flume Installation

* Available for rental