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Water flow

Accurate flow and discharge measurement has been a core competency of OTT Hydromet since we created our first flow meter in 1875. Choose from a variety of either portable or stationary measurement options using different measurement technologies, including mechanical, acoustic, Doppler, and more.

Small - Mini Current meter for discharge measurements OTT C"

OTT C2

Small - Mini Current meter for discharge measurements OTT C"

The OTT C2 small current meter for discharge measurements for shallow waters in small rivers, channels, laboratories and river models.

  • Spot
  • Mechanical
  • Flow velocity
  • OTT C2 - the original for wading rod measurements in shallow streams, applicable from 4 cm water depth.
  • 0.025 ... 5 m/s
  • ± 2%
Hach FLO-DAR

Flo-Dar (Marsh McBirney)

superrior non-contact sensor designed to measure flow in open channels - OTT - Hach

Hach Flow’s FLO-DAR® AV Sensor is a non-contact sensor designed to measure flow in open channels using radar technology with patented algorithm’s to capture highly-accurate flow data.

  • fix installed, mobile
  • Flow velocity, water level
  • Non-contact pulse radar
  • Perfect solution for difficult flow conditions, optional surcharge velocity sensor
  • Radar: 0.23 ... 6.10 m/s , Water level: 0 ... 152.4 cm / Optional 0 ... 6.1 m
submersed acoustic doppler flow sensor

SubAV (American Sigma)+ Hach AV 9000

acoustic doppler measuring technology

The robust Hach Submerged AV Sensor is a submersed acoustic doppler flow sensor with advanced diagnostics and filtering options, making it ideal for challenging flow conditions.

  • fix installed, mobile
  • Flow velocity
  • Ultrasonic
  • Proven ultrasonic-doppler-sensor "Bottom-up"; advanced diagnostic tools and settings for difficult sites
  • -1.52 ... 6.1 m/s
  • ±2% of measured value
Robust flow logger

Hach FL900

Robust Flow Logger

The portable Hach FL900 Series Flow Logger works with any of Hach’s sensors: contactless FLO-DAR® AV, Sigma Submerged AV and FLO-Tote® 3 AV.

  • Mobile
  • Plug and play sensor ports,easy installation/versatile mounting options