Oval Gear Flow meter

Square Plus Pattern

Oval Gear Flow Meter

Oval Gear Flow meters are the instruments, invented based on the positive displacement principle considering accuracy and precision as the core of their performance. These volumetric flow meters are best used in industries like oil and petroleum, chemicals, pharmaceuticals, general manufacturing industries where high level of accuracy and repeatability are required.


Operation Principal

Liquid Passes into the single case measuring chamber and displaces two oval gears. Each rotation of an oval gear is proportional to a discrete unit of volume. In turn, the speed at which the gears rotate is directly proportional to flow rate. Reed or Hall Effect sensors mounted outside the pressure boundary detect the movement of the oval gears, thus allowing local or remote instruments to dis-


  • High Resolution Digital Output
  • Digital or Analogue Outputs available
  • Wide Range ability
  • Less slippage
  • Smoother and quieter
  • Bi-directional flow capability
  • Low Mass oval gears facilitate fast response
  • time to step changes in flow rate

Areas of Applications

For all viscous, non-abrasive clean liquids like

  • Petroleum Products
  • Oil Products
  • Chemicals
  • Grease
  • Fuels
  • Pastes, etc.

Product Performance & Specification

Model FS04 FS06 FS08 FS12 FS20 FS25 FS40L FS50 FS80
Capacity Group Low Medium High
Normal Size ( Inch) 1/4" 1/4" 3/8" 1/2" 3/4" 1" 1.5" 2" 3"
Flow Range (LPH) 0.7 to 50 5 to 150 20 to 300 50 to 1200 150 to 2000 200 to 4000 500 to 10000 600 to 20000 1000 to 50000
Accuracy +/- 1 % of Reading +/- 0.5% of Reading (10:1 turndown)
Repeatibility Typically 0.03% of reading
Temperature Range 200C to 850 C (for Aluminium body) -200 C to 1200 C (for SS. Body) refer factory for lower and higher temperature ranges
Maximum Pressure (threaded meters) in bar
Aluminium Meters 25 bar
SS 316 meters 200 bar
High Pressure Model Refer Factory
Electrical for pulse meter
Output Hall Effect NPN/PNP Pulse
Pulse / Litre 5635 6000 1700 860 260 95 35 12 6
Optional outputs 4-20 mA, 485 Modbus communication
Protection class IP66/67
Noise generation 75 db
Dimensions Refer datasheet