ISCO's H-ADFM Flow meter is ideal for open channels greater than 3m

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
Product Options


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.


Related products


Yes, the ordering process is very easy. Orders can be made via purchase order or by credit/debit card. Once we have the paperwork we can delivery next day to any location in Europe. Provided with the equipment is a quick start guide, and if you need extra support, the technical support engineers can be contacted via phone call.
No, all of our flowmeters are competitively priced and rental is an ideal option for cutting costs to a fraction of a full priced new flowmeter.
No problem. The quick start guide is designed to make installing the flow meters a simple task. Everything you require for set up will be found in the peli-box supplied with the flowmeter.
Every flow meter is tested upon shipping and return as part of our ISO9001 procedure. Also, as part of this procedure, the flow meter is calibrated once a year. If a copy of the calibration certificate is needed let us know.
The flow meters typically provide an accuracy of ±1 to 2% of rate, so if you are measuring 100l/sec then the accuracy is between 98-102l/sec.
We are here to help. If the self-help and quick start guides do not help, then call one of our technical support engineers on +44 (0) 1527 882060. We have supplied and supported many clamp on rental installations throughout Europe.
First, contact us for a quote. If you are happy with the quote then send us a purchase order. Or alternatively call us with credit card details and fill out and send us a rental agreement form.
If the stock is permitting, and all paperwork is received by 12pm then flow meters can usually be available the next day.
The minimum hire period for flow meters is one week.
Once you have the meter you can rent it for as long as you need it. However, it would help if you can let us know that you wish to extend the rental period. Upon return the meter is off-hired and once checked and tested, an invoice will be issued to you. Also, if you extend your rental past a 4, 8 or 12 week rental threshold, then you are entitled to a discount.
You are only charged for the period of time for which you have the flowmeter. So, if a flowmeter is returned 3 days late you are only charged for 3 extra days, and each of these days is charged at one fifth of the weeks hire cost.
Normally, you will use your own courier but if you have any problems let us know and we can arrange a pick up the day after you notify us, but you will be charged for the carriage and this cost will be added to the invoice.
Without exception, all our flow meters are tested. If you need a 110v plug instead of the standard 230v plug let us know.
All of our standard transducers will do -40degC to +150degC, but this will depend on your application.
  • Liquid: below 50mm CFLP transducers are required, 50-1000mm CRS-402 transducers and 150-8000mm CRS-401 transducers. All the bits you need can be supplied, and delivered with the meter.
  • Gas: below 80mm CRS-402 is required, for 80-300mm the CRS-401/CRV-310 and for above 300mm the CRW-312 transducers are required.
  • High temperatures: For liquid we can measure +450degC for liquid and for gas/steam +250degC. But please consult RS Hydro.
Of course, we make a small surcharge for each set of transducers. Most applications only require one set, but on occasion some people may require two, for more diverse pipe sizes and applications.
An ultrasonic wall thickness gauge, that measures to within 0.05mm, is provided as standard with all flow meter rental packages.
The screendump facility on the integrated dataloggers on all our flow meters, allows you to photograph any screen and download it to your pc.
After the equipment has been shipped, it is the responsibility of the hirer. However, in our experience it is rare that any of our flow meters are damaged. Our flow meters are tough, as well as accurate, and reliable.
We have hired more ultrasonic clamp on flow meters than any other company in Europe. We are now one of the world's largest distributors of GE Panametrics flow meters. We always review your application before hire so no unwanted surprises are encountered. Every effort has been made to make your flow meter hire and enjoyable experience: quick start guides to help you set up with ease, online videos for further help, rugged packaging for extra durability anywhere, and real flow engineers available for online/telephone support.