Design/Operation
Velocity-type meter. Water, evenly distributed by multiple precision-machined jet nozzles, flows past an impeller in the measuring chamber, creating an impeller velocity directly proportional to water flow rate. The meter's register integrates velocity into totalized flow.

Main Case
Waterworks bronze case of 81% copper composition with externally threaded ends or oval flange ends. Bronze register retaining rings are standard.

Measuring Chamber
The measuring chamber housing and measurement element are constructed of a durable synthetic polymer and can easily be removed from the main case without removal of the meter from the line. The chamber housing is constructed in two parts to allow access to the impeller.

Measurement surfaces are not wear surfaces, providing sustained accuracy despite the presence of entrained solids in the water. A long-life, sapphire bearing serves as a wear surface, with balanced water flows minimizing bearing wear.

• Register Sealing
  All registers are permanently sealed, with a stainless steel base and wrap-around gasket to prevent intrusion of dirt or moisture. Direct read and DIALOG^® System registers also incorporate a tempered glass lens.
  

• Registration Units
  Registration available in U.S. gallons, cubic feet, or cubic meters.
  

• Test Circle
  Large center sweep hand with ten clearly indicated graduations per minimum registration unit.
  

• Low Flow Indicator
  Center mounted indicator with high sensitivity resulting from direct measurement element linkage.
  

• Strainer
  A rugged, 360-degree polymer basket strainer protects the critical measuring element from damage.
  

• Adjusting Port/Tamper Detection
  Sealed after factory calibration. Port is accessible for utility recalibration, to compensate for inaccuracy in older meters without parts replacement. The Master Meter Multi-jet adjusting port is sealed to prevent tampering and provides a visual indication of tampering attempts.