H-ADFM - Horizontal Acoustic Doppler Flow Meter (ADCP)

  • Advanced Flow Measurement Performance The most precise and accurate choice for metering sites in very large pipes and open channels
  • Revolutionary Flow Meter Has set new standards for flow measurement in wide channels and enabled doppler technology for open channels in applications of 10ft or greater
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The H-ADFM is a revolutionary flow meter that has set new standards for flow measurement accuracy in wide channels and has made pulse doppler technology available for open channel applications with a width of 10ft or greater. The H-ADFM mounts on the side of a channel which allows easy access for maintenance. It measures the horizontal distribution of velocity within the flow, across the channel, using pulse doppler velocity profiling technology. Horizontal profiling increased information on the flow conditions and velocity structure that can not be provided from a single point surface measurement

The H-ADFM is the most versatile and most accurate flow meter available for metering sites in open channels and very large pipes including chlorine contact basins and other applications with rapidly changing, non-uniform, near zero, zero , reversed or backwatered flow conditions.The H-ADFM sensors can also be 'stacked' to provide horizontal profiles at multiple depths in the flow, providing superior data quality and increased accuracy eve in difficult hydraulic conditions.

Standard Features

  • Submersible sensor (to 100ft)
  • Pulse doppler velocity profiling technology
  • Real-time data output
  • Upward looking depth sensor and redundant cross-channel velocity sensors combined in one housing
  • Processing and sensor electronics in a single module
  • Data quality verification information (correlation and signal strength)
  • Stainless steel mounting bracket for installation on side of channel.
  • Rugged construction

Manufactured by: Teledyne ISCO
Model: H-ADFM - Horizontal Acoustic Doppler Flow Meter (ADCP)

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Wastewater treatment facilities
Wastewater collection systems
Combined sewer systems and outfalls
Industrial discharges and process
Stormwater conveyance and outfalls
Irrigation canals and channels


H-ADFM Measurement Performance - Flow Rate
Flow Rate Accuracy 2-5% of reading
Measurement Performance - Velocity
Velocity of Range ±15 ft/s (±5 m/sec)
Number of Cells 1-128
Velocity Bin Size 0.8 to 12 ft (250 mm to 4 m)
Maximum Profiling Range 65 ft (20 m) at 1200 kHz (Maximum range depends on a number of factors, including temperature, salinity, suspended materials)
Minimum Recommended Channel Width 10 ft (3 m) at 1200 kHz
Velocity Accuracy ±0.5% ±0.01ft/s (3mm/s)
Measurement Performance - Water Level
Range 0.3 to 30 feet (100 mm to 9 m)
Accuracy ±0.25%
H-ADFM Transducer Assembly
Beam Geometry 2 beams, ±20°
Beam Width 1.5°
Temperature Sensor
Range -25° to 105°F (-4° to 40°)
Accuracy ±0.4°F (±0.2°C)
Tilt Sensor (2 axes)
Range ±10°
Accuracy ±0.2° at 0°, ±0.5° at 10°
Physical - H-ADFM Sensor
Weight 7.5lb (3.4kg)
Dimensions (H x W x D mounted horizontally) 7.2 x 7.2 x 7.4 inches (183 x 183 x 189 mm)
Construction Cast polyurethane with titanium hardware, mounting plate included.
Physical - Sensor Signal Cable
Operating Temperature -40 to 125°F (-40 to 52°C)
Physical Polyethylene jacket
Length 80 ft (25 m)
Minimum Bend Radius 6 in (150 mm)
Outer Diameter 0.5 in (13 mm) nominal
RS-232 Simultaneous RS-232 and internal logging supported. Serial data rates - 300 to 115,200 bps.
Voltage 9 to 18 VDC
Max Current 1.5A
Power Consumption Energy consumption depends on velocity profiling parameters. Contact the Isco factory or your Isco representative for an accurate prediction in your specific application.
Compatible Software WinH-ADFM Software is a comprehensive software package for H-ADFM set-up, operation, data review, and data management.


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