Isodaq Technology is now part of Hydro International.

PCM 4 Cross Correlation method


  • Battery-powered flow meter for short-term surveys
  • Profiles velocity using cross-correlation method
  • Suitable for pipes,  culverts and small streams
  • Lightweight portable meter for rapid deployment
  • Outputs data to ISODAQ telemetry loggers
  • Large backlit LCD display for intuitive operation

PCM4 in enclosure

Full Description

The PCM 4 is a battery-powered portable flow meter which provides for accurate flow measurement in difficult channels where weirs and flumes cannot be installed due to the hydraulic conditions.  The device utilizes the ultrasonic cross correlation method, which measures the velocity profile in the channel, helping to minimize the need for regular on-site calibration checks. The device is suitable for measuring flows in small open-channels channels or partially-filled pipes and culverts.

A range of depth sensor 4-20mA inputs are available to provide water level measurement; a maximum of two sensors can be used with one velocity sensor input.