No matter how challenging the application or site conditions, Teledyne Isco offers a proven technology for your needs.
AV sensors continuously transmit an ultrasonic signal from within the flow stream.
Those signals are reflected off bubbles and particles, and return to the sensor where
frequency shift is measured to derive an average velocity. A differential pressure
transducer in the sensor measures liquid depth to determine the flow area. Flow rate
is then calculated by multiplying the area of the flow stream by its average velocity.
Ceramic crystals transmit acoustic signals (sound pulses) into the flow stream. They
are echoed back after contacting bubbles or particles.
By measuring the difference in frequency between the emitted and returned
signals (known as Doppler shift), the velocities of particles in the flow stream can be accurately determined.
By “range gating” the returned signals, velocity is measured in multiple, distinct cells, called velocity bins. Detailed velocity data in relation to sensor location is then used to calculate a highly-accurate flow profile.
With its sensor mounted above the flow stream, transmitted sound pulses are
reflected off the liquid surface. The elapsed time between transmitted and returned
signals determines liquid level.
Flow rate is then calculated using one of the meter’s built-in flow conversions, or a
user-defined level-to-flow relationship
Especially useful in flow streams affected by harsh weather, debris, or corrosive chemicals, bubbler technology forces compressed air from a submerged tube. The depth of flow is determined by measuring the pressure needed to force the bubbles out of the line. That information is then converted into the flow rate using known parameters.
For sites where wind, steam, foam, or turbulence exist, a probe mounted at the
bottom of the channel measures the pressure of the liquid above to determine
flow stream depth. The level reading is then converted to flow rate using known
The LaserFlow sensor remotely measures flow in open channels with non-contact Laser Doppler Velocity technology and non-contact ultrasonic level technology. The sensor uses advanced technology to measure velocity with a laser beam at single or multiple points below the surface of the water. A non-contacting ultrasonic transmitter measures the liquid head height to determine the wetted area. Multiplying the wetted area by the average velocity yields the flow rate. Flow during surcharge conditions can be measured with an optional, integrally-mounted continuous-wave Doppler area velocity sensor.
Flow measurement choices with unique benefits for capacity assessment,
inflow & infiltration, and sanitary sewer evaluation
Energy efficient battery-powered flow loggers for portable installation
Remote telemetry options for flow loggers in permanent installations
Flow monitoring systems with unique technologies for low and high
water level applications
Event notification and remote telemetry options
NEMA 6P and IP68 protection
Cost-effective alternatives to primary devices at plant inlet, eliminating
downstream excavation and construction cost
Choice of flow technologies to measure flow in chlorine contact or effluent discharge
Dry and wet weather flow studies in conjunction with rainfall
Parameter, rain gauge, automatic sampler interface with flowmeter
Remote telemetry system
Accurate flow measurement during varying inflow conditions
Accurate full-pipe flow measurement without lengthy straight runs or bypass
Remote telemetry system
Highly accurate flow measurement with and without primary devices
Accurate flow measurement for turbulent flow, and zero or near-zero velocities
2100 Series Flow Meters. Isco's 2100 Series offers flexible, modular design and easy configuration for a wide range of networked, open-channel flow monitoring applications including; Inflow and Infiltration studies, cMOM data collection, and river monitoring. Compact, stackable, NEMA 4x, 6P (IP67) modules snap together to provide the capabilities needed for practically any site and monitoring requirement.
○ 2100 series brochure
○ 2150 datasheet
○ 2105 interface module
Signature® Flow Meter. The Signature flow meter is designed for open channel flow monitoring applications. It supports flow measurement technologies including bubbler, noncontact laser area velocity, submerged Doppler ultrasonic area velocity, and ultrasonic.
The meter can calculate flow using standard open channel level-to-flow and area velocity conversions, as well as user-defined equations, level to area data points, or level to flow data points, depending on the application need. The Signature flow meter has unique features to verify data integrity. It logs key events such as changes in calibration and power outages
to validate data accuracy. Data can be easily reviewed to detect any type of data alteration.
With multiple smart interface options and multiparameter
logging (such as pH), the Signature flow meter provides a common platform for control action, reporting, and communication.
Available Measurement Technologies
○ Non-Contact Laser Velocity
○ Continuous Wave Area Velocity
Signature Flow Meter Brochure
Isco Non-Contact LaserFlow™ Velocity Sensor.
The LaserFlow™ remotely measures flow in open channels with non-contact Laser Doppler Velocity technology and non-contact Ultrasonic Level technology.
The sensor uses advanced technology to measure velocity with a laser beam at single or multiple points below the surface of the wastewater stream. (Patent Pending) The LaserFlow is ideal for a broad range of
wastewater monitoring applications. It is compatible with both the Teledyne Isco Signature Flow Meter and the Teledyne Isco 2160 LaserFlow Module, depending on the type of installation.
During submerged conditions, flow measurement continues without interruption with optional Doppler Ultrasonic Area Velocity technology.
With its specially designed mounting bracket in place, the LaserFlow can be deployed and removed from above ground, eliminating unsafe and timeconsuming confined space entry. A variety of communication options enable programming and data retrieval from a remote location. Information about data quality can be recorded and transmitted alongside the flow data.
Laser Flow Velocity Sensor Datasheet
ADFM Velocity Profiling Flow Meters. Isco's ADFM family of flow meters leverage patented ADFM technology, which uses multiple pulse Doppler beams instead of a single continuous wave transmission. As a result, the ADFM obtains highly accurate and precise flow measurement data. Ideal for open channel flow monitoring in non-potable water, ADFM technology delivers exceptional accuracy and precision at sites with difficult hydraulic conditions; no in-situ calibration is required.
○ ADFM flow meters
○ ADFM PRO 20 large pipe datasheet
○ ADFM PRO 20 velocity profiler brochure
○ Hot tap brochure
○ Hot tap ADFM closed pipe datasheet
○ accQmin ADFM small pipe datasheet
Street Level Installation Tool. Measuring flow and water quality in sewers is now fast and easy. The Isco Street Level Installation Tool lets you install your monitoring system from ground level, eliminating the costs and hazards of manhole entry. Pole sections can be combined to access pipe as deep as 15 feet. Use the Street Level Installation Tool with the following Isco flow and parameter sensors: Area Velocity Sensors, Submerged Probes, Bubble Lines.
Street Level Installation Tool Datasheet
Flowlink Software 5.1. New Flowlink 5 ® Software from Teledyne Isco is designed to serve as the centerpiece of comprehensive sewer flow monitoring programs. In addition to automating many data retrieval and reporting tasks, the Flowlink Version 5 release includes advanced analytical functions, powerful editing capabilities, and data integration features. Flowlink provides powerful single-site and multi-site data management for a wide range of applications.
Flowlink 5.1 Overview Datasheet
Flowlink Pro has all the features of Flowlink, but is specially designed for large municipalities and service providers who manage extensive waste water flow monitoring networks. Flowlink Pro adds advanced data communication features using internet protocols, and support for centralized Oracle® and Microsoft® SQL databases.
Flowlink Pro Overview Datasheet