The ADFM® Pro20 brings unparalleled flow measurement accuracy to large pipes and channels, delivering flow rate data within 2% of actual value, in flow depths up to 20 feet (6 m). 

Four (4) piezoelectric ceramics in the sensor emit short pulses along narrow acoustic beams pointing in different directions to measure velocity. A fifth ceramic mounted in the center of the sensor assembly, and aimed vertically, is used to measure the depth. 

Each acoustic beam measures velocity at multiple points, known as bins, in the water column. The measured velocity data within each bin are very precise – to within 0.01 ft/s. This distribution of accurate velocity measurements is then used to determine the flow pattern over the entire cross-section of flow. Since the flow pattern and measured velocity distribution are dependent on each other, the ADFM’s advanced flow algorithms automatically adapt to changing hydraulic conditions within the pipe. This removes the need for in-situ calibration and insures accurate flow rate measurement over a host of different measurement environments and hydraulic conditions. 

The ADFM enclosure houses the signal processing, data logging, and data output electronics. The enclosure is available as a NEMA 4X Box housing, suitable for wall or console mounting in permanent applications, and a NEMA 6P cylindrical housing for use in manholes or other “wet” environments.

Standard Features

• Pulse-Doppler velocity profiling technology 
• Quad-redundant velocity sensors and depth sensor combined in a single housing 
• Upward looking sensor mounts on a stainless steel band and is positioned in the channel invert 
• Data quality verification information (signal strength and correlation) 
• In-situ calibration never required 
• Rugged, long lasting construction 
• Real-time data output

Applications

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

Options and Accessories

• Industry standard communications protocol interfaces 
• Secondary depth sensor (pressure or ultrasonic)

ADFM Pro20 Measurement Performance - Flow Rate

Measurement Performance - Velocity

Measurement Performance - Water Level

ADFM Pro20 Acoustic Frequency

Physical - ADFM Pro20 Electronics unit

Physical - ADFM Pro20 Sensor

Physical - Sensor Signal Cable

ADFM Pro20 Data Types

Data Storage and I/O

Power

Software

The accQmin® Flow Meter brings unparalleled measurement precision and accuracy in small pipes and channels with flow depths of 3 to 48 inches (75 to 1200mm). 

Three (3) piezoelectric ceramics in the sensor emit short pulses along narrow acoustic beams pointing in different directions to measure velocity. A fourth ceramic mounted in the center of the sensor assembly, and aimed vertically, is used to measure the depth. 

Each acoustic beam measures velocity at multiple points, or “bins”, within the water column. The measured velocity data within each bin are very precise – to within 0.01 ft/s. This distribution of accurate velocity measurements is then used to determine the flow pattern over the entire cross-section of flow. Since the flow pattern and measured velocity distribution are dependent on each other, the accQmin’s advanced flow algorithms automatically adapt to changing hydraulic conditions within the pipe. This removes the need for in-situ calibration and ensures accurate flow rate measurement over a host of different measurement environments and hydraulic conditions. 

For measurement in challenging low-depth-of-flow conditions, the accQmin sensor can be mounted in the optional Flow Conditioning Platform. This platform effectively reduces velocity profile distortion and adverse effects caused by placing a sensor in the flow stream. The result is precise and accurate data even in flow depths as low as 3 inches (75 mm). 

The accQmin Velocity Profiler is also available in a Class I, Div 1 configuration.

Standard Features

• Pulse Doppler velocity profiling technology 
• Tri-redundant velocity sensors and depth sensor combined in a single housing 
• Upward-looking sensor mounts on a stainless steel band and is positioned in the channel invert 
• Data quality verification information (signal strength and correlation) 
• In-situ calibration never required 
• NEMA 6P electronics assembly housing 
• Rugged, long lasting construction 
• Real-time data output

Applications

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

Options and Accessories

• Industry standard communications protocol interfaces 
• Secondary depth sensor (pressure or ultrasonic) 
• Unique Flow Conditioning Platform 
• Intrinsic Safety System for area classified as CSA Class 1, Div. 1, Group C & D 
• Optional Barrier Module for Intrinsic Safety Systems is used to connect CSA-certified accQmin sensors with accQmin electronics

Measurement Performance - Velocity

Measurement Performance - Water Level

accQmin Accoustic Frequency

Physical - accQmin Electronics Unit

Physical - accQmin Sensor

Physical - Sensor Signal Cable

accQmin Data Types

Data Storage and I/O

Power

Software

The introduction of the revolutionary H-ADFM Flow Meter has made pulse Doppler technology available for open channel applications 10 feet in width and greater. The H-ADFM has set a new standard for flow rate measurement accuracy that previously was not attainable in wide channel applications. 

The H-ADFM pulse Doppler velocity profiling technology measures the horizontal distribution of velocity within the flow, across a channel. Horizontal profiling provides increased information of the velocity structure and flow conditions; information that a single point measurement on the surface or in the flow cannot provide. 

The H-ADFM mounts on the side of a channel allowing easy access to the system for maintenance when needed. Additionally, several H-ADFM sensors can be “stacked”, providing horizontal profiles at multiple levels in the depth of flow. This generates increased accuracy and enables superior data quality even in difficult hydraulic conditions. 

The H-ADFM‘s advanced flow measurement performance capability makes it versatile and the most precise and accurate choice available for metering sites in very large pipes and open channels – such as chlorine contact basins – and other applications with non-uniform, rapidly changing, backwatered, near zero, zero or reverse flow conditions

Standard Features

• Pulse Doppler velocity profiling technology 
• Redundant cross-channel velocity sensors and upward-looking depth sensor combined in a single housing 
• Sensor submersible to 100 ft. 
• Stainless steel mounting bracket for installation on the channel side 
• Data quality verification information (signal strength and correlation) 
• Rugged, long lasting construction 
• Real-time data output 
• Sensor and processing electronics all in a single module

Applications

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

Options and Accessories

• Industry standard communications protocol interfaces 
• Secondary depth sensor (pressure or ultrasonic)

H-ADFM Measurement Performance - Flow Rate

Measurement Performance - Velocity

Measurement Performance - Water Level

H-ADFM Transducer Assembly

Temperature Sensor

Tilt Sensor (2 axes)

Physical - H-ADFM Sensor

Physical - Sensor Signal Cable

Communications

Power

Software

The ADFM Hot Tap Flow Meter provides precise and accurate flow rate measurement in full and pressurized pipe applications where the pipe ID is 18" (460 mm) or greater. The Hot Tap can be used in the difficult hydraulic conditions often found in force mains, siphons, process lines, and other full-pipe applications. 

The ADFM Hot Tap is a variant of the standard, open channel ADFM flow monitoring system. The Hot Tap combines the widely used ADFM pulse Doppler velocity profiling technology with a unique sensor assembly suitable for insertion into full, operating pipes. 

The Hot Tap’s velocity profiling technology enables accurate flow rate measurement without the usual lengthy upstream and downstream straight-line conditions required by other technologies. It measures flow rate to within ±2% of actual flow rate in closed pipes, even in difficult applications such as installations near bends, short straight runs, near pumps, etc. 

Installation is accomplished by inserting the sensor into an industry standard two-inch NPT tap through the pipe wall. Installation is straight-forward and quick, providing easy access to the sensor for routine inspection and maintenance when needed. The Hot Tap is constructed of robust materials insuring years of worry-free operation. 

The Hot Tap sensor uses standard ADFM electronics for data processing, collection, and storage. For customers already familiar with the standard ADFM system, operating the Hot Tap system will be intuitively easy. All standard ADFM software, communication, and interface equipment are available for the Hot Tap.

Standard Features

• Pulse Doppler velocity profiling technology 
• Quad-redundant velocity sensors in a single housing 
• Data quality verification information (signal strength and correlation) 
• In-situ calibration never required 
• Rugged, long lasting construction 
• Real-time data output

Applications

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

Options and Accessories

• Industry standard communications protocol interfaces 
• Secondary pressure depth sensor

ADFM Hot Tap Velocity Profiler

ADFM Hot Tap Measurement Performance – Flow Rate

ADFM Hot Tap Measurement Performance – Velocity

ADFM Hot Tap Acoustic Frequency

Physical - ADFM Hot Tap Electronics unit

Physical - Hot Tap Insertion Sensor

Physical – Hot Tap Sensor Signal Cable

ADFM Hot Tap Data Types

Data Storage and I/O

Power

Software

The accQcomm™ digital/analog interface module accepts RS-232/RS-422 serial data from up to three Isco ADFM® flow meters (ADFM Pro20, Hot Tap, accQmin™, or H-ADFM) and converts the data into an industry-standard digital protocol (MODBUS or Ethernet) or industry-standard analog signal (4-20 mA). Either method allows easy interface with SCADA/DCS or other secondary control or data recording systems. 

The module is wall or console mountable and is powered with 12 to 24 VDC.

Standard Features

• Three serial inputs, RS232 or 422, for simultaneous integration of up to 3 different ADFM systems. 
• MODBUS or Ethernet interface for digital data access. 
• Four independent, galvanically isolated 4-20 mA analog outputs, programmable for any measured parameter. 
• Sums and averages of data from the three instruments selectable as an output. 
• Eight optically isolated relay outputs for issuing alarms based on user-defined conditions.

Applications

• Provides real-time SCADA/DCS interface for applications in: 
  - Wastewater collection and treatment 
  - Stormwater collection and discharge 
  - Industrial process and treatment

accQcomm Interface Module

accQcomm - Physical/environmental

accQcomm Digital I/O

accQcomm Analog Output

accQcomm Relay Alarm Outputs