OTT C31 Universal Current Meter for discharge measurements

Categories: , Tags: , ,

The OTT C31 Universal Current Meter is designed for flow velocity measurements in combination with hand-held wading rods or cable suspended from a bridge or boat. Different accessories like sounding weights (middle pieces), sounding reels (winches), cable ways etc. allow the setup of a complete flow monitoring station.

OTT C31 Universal current meters mean thousandfold proven quality, precision and reliability – worldwide for decades.

  • Spot
  • Mechanical
  • Flow velocity
  • C31 – the original. Taditional hydrometric current meter with proved quality for use with wading rods, from bridges and at cable-way installations
  • 0.025 … 10 m/s
  • ± 2%


The robust construction and high-quality materials allow operation even under difficult conditions with high accuracy

  • Low starting speed
  • Reinforced meter spindle
  • Cost reduction owing to low maintenance requirements and simple, inexpensive handling
  • World wide proven

Examples of Use

Universal application for river flow measurements as rod-mounted current meter or as suspended version

  • Use with single-drum winch in combination with a bridge jib/measurement trolley or with double-drum winch cable-way  installation.
  • Calibration and cyclical control of flow velocity and discharge measuring equipments.


Operating Instructions Universal Current Meter C31
Leaflet – Universal Current Meter OTT C31
Brochure – OTT Discharge – Mobile measurement systems


Zählgerät für die Abflussmessung mit Messflügel

Technical Data

Flow velocity
Measuring range 0.025 … 10 m/s
Current meter 1 pulse/revolution
Reed relay contact lifetime > 1 million contacts switches
Operating voltage range max. 9V DC
Magnetic switch pressure-tight up to 30bar
Meter body stainless steel
Propeller aluminium
alternative -plastic – Hostaform C , yellow
Dimensions & weight
Size dia. x length ø35 x 310mm
Weight w/o propeller 1.26 kg

Download PDF