The ChronoFLO® 2 transit time flowmeter can measure instantaneous flow rates in your flow-carrying pipes. This instrument uses a fully coded signal correlation process to obtain stable measurements even under the most challenging conditions. To cover a wide range of applications in any sector, only one battery powered signal processing unit is used. This configuration is supplied with two sensors and a mounting rail that fits a wide range of diameters.

ChronoFLO® 2 is used for the following applications:

  • Diagnosis of drinking water and wastewater networks,
  • DMA (leak detection monitoring),
  • Checking existing flowmeters,
  • Calibration of lift pumps,
  • Volume quantification.


ChronoFLO®2 Clamp On Transit Time Flowmeter

Measurement Principle

The flow rate is calculated from the speed of propagation of the ultrasound signal. This signal travels faster in the direction of fluid flow than in the opposite direction (like a swimmer going downstream or upstream).

Two ultrasound pulses are emitted by the sensors, which act alternately as transmitters and receivers:
One pulse in the direction of fluid flow (t2),
The other pulse in the opposite direction of the fluid flow (t1).

The mean velocity of the fluid is obtained from the difference in transit times Δt = (t2 – t1).
The flow rate is automatically deduced according to the internal cross-section of the pipe