United Controls

Before LaserFlow, non-contact sensors only measured surface velocity. Now, this non-contact sensor penetrates the water with laser technology to measure velocity at multiple subsurface points.

Advanced laser Doppler technology for non-contacting area velocity flow measurement

LaserFlow™ Non-contact Velocity Sensor

Advanced laser Doppler technology for non-contacting area velocity flow measurement

The LaserFlow™ velocity 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 wastewater stream.

The sensor uses an ultrasonic level sensor to measure the level and determines a sub-surface point to measure velocity. The sensor then focuses its laser beam at this point and measures the frequency shift of the returned light.

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 continuous wave Doppler Ultrasonic Area Velocity technology.

With its specially designed mounting bracket in place, the LaserFlow can be deployed and removed from street level. This avoids the risk and expense of 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 with the flow data.

Additionally, built-in diagnostic tools simplify installation, maintenance, and advanced communication options reduce site visits.

System Versatility
From industrial applications to manhole installations, the LaserFlow offers versatile configuration options to give you the flexibility to measure flow in most open channel applications. The sensor is compatible with both the Signature flow meter for permanent discharge compliance monitoring, and the 2160 module for everything from portable surveys to permanent installations. Both flow meters have a variety of communication options for remote data access and programming, eliminating the need for frequent site visits.

Single- or Multipoint Measurement
Depending on your application needs, the LaserFlow device can be programmed to take velocity measurements at single or multiple points below the water's surface, producing an accurate mean velocity reading.

Remote Ultrasonic Option
In applications where the level measurement point of the built-in ultrasonic and the measurement point of the laser velocity are of different elevations, such as a freefalling outfall or drop manhole, the remote ultrasonic option can be used so that both measurement points reference the same elevation.

Due to unique site requirements, various mounting hardware is available for use with the LaserFlow sensor and 310 remote ultrasonic sensor.

Optional Submerged Functionality
During submerged conditions, when water reaches the LaserFlow, the optional bottom-mounted TIENet™ 350 Area Velocity sensor seamlessly takes over the flow rate measurement. The sensor provides ultrasonic Doppler velocity measurement and Differential Pressure level measurement. This option measures flow in the pipe/channel. By measuring velocity over a large area, the ultrasonic Doppler technology provides more accurate flow measurement during submerged conditions.

Optional Redundant Measurement
For redundant flow measurement at critical monitoring sites, a unique flexibility is added by the optional 350 sensor when mounted at the bottom of the pipe. This sensor provides redundant velocity, level, and flow data from the same site as the LaserFlow device.

Easy and Secure Retrieval/Replacement Without Manhole Entry
Following initial installation and adjustment, the sensor can be installed or removed as needed without manhole entry in most situations, using the optional sensor retrieval arm to grasp the handle.

The handle's simple yet effective locking mechanism holds the sensor securely in place, and is easy to engage and release from above ground.

Standard Features

Non-contact velocity and level measurement
Single or Multiple Point measurement below the liquid surface
Rugged, submersible enclosure with IP68 ingress protection
Zero deadband from measurement point in non-contact level and velocity measurements
Quality readings without manual profiling
Bidirectional velocity measurement

Applications

Permanent and portable flow measurement for CSO, SSO, I&I, SSEs, CMOM, and other sewer monitoring programs
Shallow flow measurement in varying pipe sizes
Wastewater treatment plant influent, process, and effluent flow measurement
Industrial process and discharge flow measurement
Stormwater conveyance and outfall
Irrigation canals and channels

Options and Accessories

Flow measurement during submerged conditions via Ultrasonic Doppler technology
Redundant flow measurement with simultaneous Continuous Wave Doppler or Ultrasonic Level Sensing
Permanent and temporary mounting hardware
Sensor retrieval arm enables installation and removal without confined space entry
Remote ultrasonic level sensor options for drop manhole and outfall applications

Specifications

Primary Measurement - TIENet® 360 LaserFlow™ Sensor
Size (HxWxD):	38.01 x 26.21 x 56.7 cm (14.96 x 10.3 x 22.32 in)
Weight:	8.7 kg (19.2 lbs)
Materials:	Conductive Carbon Filled ABS, SST, Conductive Kynar®, Anodized Aluminum, UV-Rated PVC
Cable Lengths:	10 or 23 m (32.8 or 75.5 ft)
Enclosure:	IP68
Certifications:	CE EN61326; FDA CDRH, 21CFR1040; IEC 60825-1
Laser Class:	Class 3R
Operating Temperature Range:	-20 to 60 °C (-4 to 140 °F)
Storage Temperature Range:	-40 to 60 °C (-40 to 140 °F)
Power:	Required Input voltage 8 to 26 VDC, 12VDC Nominal
Flow Accuracy:	±4% of reading under normal conditions
LaserFlow Velocity Measurement
Technology:	Non-Contact, Subsurface Laser Doppler Velocity (patent pending)
Measurement Range:	-4.6 m/s to 4.6 m/s (-15 ft/s to 15 ft/s)
Maximum Distance from Liquid Surface to Bottom of Sensor:	3 m (10 ft)
Direction:	Selectable Bidirectional flow measurement. Requires turbidity > 20 NTU and distance from liquid surface to bottom of sensor < 0.61 m (2 ft)
Accuracy:	±0.5% of reading ±0.03 m/s (0.1 ft/s)
Minimum Velocity:	0.15 m/s (0.5 ft/s)
LaserFlow Level Measurement
Technology:	Non-Contact Ultrasonic
Measurement Range:	0 to 3 m (0 to 10 ft) from measurement point
Accuracy @ 22 °C (72 °F):	±0.006 m (0.02 ft) at less than or equal to 1 ft level change; ±0.012 m (0.04 ft) at greater than or equal to 1 ft level change
Temperature Coefficient within compensated range:	± 0.0002 x D (m) per degree C; ± 0.00011 x D (ft) per degree F (Where D = Distance from transducer to liquid surface)
Beam Angle:	10° (5° from center line)
Ultrasonic Signal:	50 KHz
Deadband:	Zero deadband from bottom of LaserFlow sensor. Deadband for remote TIENet® 310 ultrasonic level sensor varies, depending on the type of mounting hardware.
Optional Secondary Measurement with TIENet® 350 AV sensor
Probe Size (HxWxL):	19 x 33 x 152 mm (0.75 x 1.3 x 6.0 in)
Sensor Material:	Epoxy, chlorinated CPVC, SST
Cable Material:	UV-Rated PVC
Certifications:	CE EN61326
Temperature Range:	0 to 70 °C (32 to 158 °F)
Optional TIENet® 350 AV Sensor Velocity Measurement
Technology:	Submerged Continuous Wave Doppler Ultrasonic
Measurement Range:	-1.5 to 6.1 m/s (-5 to 20 ft/s)
Velocity Measurement:	Bidirectional
Accuracy:	±0.03 m/s (±0.1 ft/s) from -5 to 5 ft/s; ±2% of reading from 5 to 20 ft/s, uniform velocity profile
Minimum Depth:	25 mm (0.08 ft)
Frequency:	500 kHz
Optional TIENet® 350 AV Sensor Level Measurement
Technology:	Submerged Differential Linear Pressure Transducer
Measurement Range:	0.01 to 3.05 m (0.033 to 10 ft)
Accuracy:	± 0.10% of full scale
Maximum Depth:	10.5 m (34 ft)
Stability:	±0.007 m/yr (±0.023 ft/yr)