Water flow measurement

The OTT C2 small hydrometric current meter is designed to measure flow in shallow waters such as small rivers, canals, laboratories or river models. The device is ideal for measuring flow velocities starting from 0.025 m/s. It can be mounted on rods with a diameter of 9 mm or 20 mm.

Method of use: manual measurement

Measurement technology: mechanical

Measured parameters: water flow velocity

Key features: original product for measurements in shallow water from a depth of 4 cm

Measurement range: 0,025 – 5 m/s

Measurement accuracy: ± 2%

Advantages

• Robust construction and top-quality materials ensure operation in the most challenging conditions whilst maintaining high measurement standards
• Low start-up speed thanks to the use of ball bearings
• Reinforced impeller shaft

Applications

• Laboratories
• River models
• Small channels
• Pipes
• Ditches

The OTT C31 universal hydrometric current meter is designed to measure the velocity of flowing water. Measurements can be taken using hydrometric rods or by means of a winch that lowers the current meter from a bridge or a boat. A wide range of accessories allows you to create a measurement kit tailored to any conditions. Over the decades, the quality, precision and reliability of the OTT C31 universal hydrometric mill have been proven time and again all over the world.

Method of use: manual measurement

Measurement technology: mechanical

Measured parameters: flow velocity

Key features: the original model for all hydrometric current meters, a top-quality device for measuring velocity using rods or a winch

Measurement range: 0,025 – 10 m/s

Measurement accuracy: ± 2%

Advantages

• Robust construction and top-quality materials guarantee operation in the most challenging conditions whilst maintaining high measurement standards
• Low minimum velocity
• Reinforced current meter shaft
• Low running costs due to minimal maintenance requirements and ease of use
• A product proven worldwide

Applications

• A versatile device for measuring river flow
• Capable of measurement using standard hydrological rods or a winch
• Periodic calibration and verification of other devices measuring water velocity or flow

Usage: portable measurement

Measurement technology: electromagnetic induction

Measured parameters: point water velocity

Key features: compact device with no moving parts, automatic measurement and data recording, easy data export

Measurement range: from close to 0 m/s

Advantages

• Compact and lightweight device with no moving parts – virtually maintenance-free system
• Automatic measurement of maximum depth in the hydrometric vertical and the current depth of sensor submersion (optional)
• Automatic recording of all measurement data – the entire measurement can be completed by one person in a short time
• Measured velocity displayed in real-time – allowing control over the measurement
• Flow calculation based on international standards – saving time for post-measurement calculations
• Easy data export from the field computer to a PC via a USB connection – all values, including the LOG file, are copied
• Rugged field computer for work in harsh conditions
• Large, color display – readable even in direct sunlight
• User guide provides step-by-step assistance with device configuration and measurement – even inexperienced users can operate it
• Resistant to harsh working conditions (dust and water), IP67 protection class – the field computer will function even after full immersion
• One field computer can work with multiple MF pro sensors

Applications

• Open channels (streams, small rivers, drainage ditches)
• Clean and heavily polluted water, sewage
• Locations with turbulent flow, heavily vegetated areas
• For calibration or control measurements

Usage: continuous online measurement

Key features: accurate surface water velocity measurement, along with metadata informing about adverse conditions (e.g., vibrations, wind, sensor position changes, etc.)

Application: non-contact water velocity measurement stations

Built-in data logger: no

Measurement range: 0,08 … 15 m/s

• Continuous, non-contact flow velocity measurement during low, normal, and high water levels
• Identification of measurement values affected by sensor movement (e.g., wind, traffic) using metadata from built-in vibration and deviation sensors
• Automatic flow direction detection
• Reduces/eliminates interference caused by wind, rain, vibrations, or waves through advanced filtering algorithms

• Floating objects or suspended sediments do not affect sensor operation, as it is installed above the water surface
• Universal and movable mounting bracket allows for quick installation on structures
• The sensor is inconspicuous due to its small size and ability to be mounted in various positions
• Maintenance-free

• Easy integration with systems without requiring extensive device knowledge
• Low energy consumption; ideal for solar-powered installations
• Easy integration with new and existing systems via SDI-12 or RS-485 interfaces
• Compatible with OTT Prodis 2 software used for system calibration

Applications

• Open channels
• Rivers
• Streams
• Irrigation ditches
• Channels for draining technological waters
• Outlets/inlets