Industrial Outflow Monitoring

Application Notes

Application Background                                                                                                                                                                                          Printer Friendly Version

Manufacturing plants, Public Utilities, Power Stations, Oil & Gas processing facilities and Sewerage plants all have some form of industrial outflow which needs to be measured and reported on.

Monitoring Industrial Overflow

Hydro Power companies need to measure the volume, temperature and quality of water passed back into the river after it has passed through the turbines.

Traditional coal or gas power stations have cooling water discharges which need to be monitored, to ensure the temperature being returned to a lake or reservoir is not above acceptable limits.

Sewerage plants must measure and record any effluent from sewer treatment plants which is being discharged back into the environment.

Application Detail

Measurements are typically flow, quality and temperature, and the measurement environments can be in pipes, or in outflow channels


For measurement of flow, there are several methods, an inside pipe or in channels mechanical propeller system to measure velocity and a separate instrument, for example a float and pulley system to measure depth. With velocity and depth, and with the shape and the width of the channel or pipe, the actual flow can be calculated.

Water Flow Monitoring System

Unidata offers a combined 6526 Starflow instrument which measures water depth using pressure sensor technology, and water velocity using ultrasonic technology and this small instrument can then be installed in an open channel or a closed pipe, either round or oval /
ovoid and the Starflow can determine the actual flow mathematically based on the entered channel definition.

Unidata-Industrial Outflow Monitoring Starflow

For measurement of other parameters for water temperature, water quality for example electro conductivity (EC) , pH ( PH) , dissolved oxygen ( DO) can be measured with separate instruments.
In some instances turbidity of the water / outflow may also be measured..
The 6526H Starflow instrument would typically be installed at the base of the outflow channel using a mounting bracket and a concrete slab and the cable would be fed to a small enclosure at the side of the channel.

Consideration needs to be given to providing a power source. If primary power is available, then a small battery backed up power supply could be used. A small solar panel could be used, with a solar power recharge system, if there is no easily accessible primary power system. A small enclosure with a lithium battery pack could be added, and this would provide a completely independent power source for the measurement station for more than 2 years, depending on the instrument s chosen.

Starflow Installation

A Neon Remote Terminal, either cell phone based or satellite based could read the instruments, perhaps every 5 minutes, and then store the data and send the data up to a Neon Server every hour so the data can be displayed on a web browser anywhere in the world.

The data could also be scanned for any out of limit condition and activate an alarm and or send an email or a text message to the appropriate people to take any action following an out of limits condition.

Industrial Outflow Monitoring

While it is unlikely that there would be a requirement for intrinsic safe instruments in this application, the issue needs to be considered. For vented sewers, there is less requirement for intrinsic safe instruments. For closed sewers perhaps intrinsic safe is a requirement.

Typical Configuration

Options for Application Specific Instruments / InputsUnidata Part NumberDescription
Ultrasonic Doppler Instrument - Velocity and Depth6526H-21Starflow Ultrasonic Doppler Instrument 0-2m
Ultrasonic Doppler Instrument - Velocity and Depth6526H-51Starflow Ultrasonic Doppler Instrument 0-5m
Tipping Bucket Flow Gauge6506GFlow Gauge 75ml
Tipping Bucket Flow Gauge6506HFlow Gauge 130ml
Options for Neon Telemetry - NRT / RTU / Field UnitsUnidata Part NumberDescription
Cellular RTU 3G2013F-AB03Neon Metering Module 3G with Antenna and Li Battery
Cellular RTU 4G2013F-AB04Neon Metering Module 4G with Antenna and Li Battery
Cellular RTU 3G - Industrial2016F-AB03Neon Remote Terminal 3G with Antenna and Li Battery
Cellular RTU 4G - Industrial2016F-AB04Neon Remote Terminal 4G with Antenna and Li Battery
Low Earth Orbit Satellite Globalstar2015E-AB0Neon Remote Terminal - Satellite Globalstar Modem with Antenna and three Li Batteries
Ethernet2017E-0B0-1 or 3NRT Ethernet with single or triple Ethernet Ports
with three Li Batteries
Equatorial Orbit Satellite - Inmarsat2018E-AB0-1 or 3NRT Ethernet with single or triple Ethernet Ports
with three Li Batteries
LCD Display2500ENRT LCD Display
NRT Field Termination Strip2103F2015E,2016F,2017E, and 2018E NRT FTS
NRT Firmware Option2303A-8M8M Extended Memory Option
NRT Firmware Option2303A-8M-CAM8M Extended Memory & Serial Camera Option
NRT Firmware Option2303A-CAMSerial Camera Option
Options for Neon Application Software - Customer ServerUnidata Part NumberDescription
Neon Application Software2302ANeon Server Software Licence Incl 5 NAL
Neon Application Software2302A-10Additional 10 NRT Access Licences
Neon Application Software2302A-20Additional 20 NRT Access Licences
Neon Application Software2302A-50Additional 50 NRT Access Licences
Options for Neon Application Software - Unidata ServerUnidata Part NumberDescription
Neon Application Software2301ANeon Data Initial Subscription Setup Fee
Neon Hosting Service2301A-01Neon Data Service Fee for 1-50 NRTs
Neon Hosting Service2301A-02Neon Data Service Fee for 51-100 NRTs
Neon Hosting Service2301A-10Neon Data Service Fee Metering
Options for Conventional Dataloggers / Field UnitsUnidata Part NumberDescription
Standards Starlogger6004D-11Red Logger 512K with Alkaline Battery
Display Starlogger6004D-21Blue Logger 512K with LCD and Alkaline Battery
Prologger7001D-11Green Logger 1M with LCD and Alkaline Battery
Micrologger8010C-EURMicrologger 512K
Starlogger Field Termination Strip6103E6004D FTS
Prologger Field Termination Strip7100E7001D FTS
Starlog V4 Management Software6308A-AUEStarlog V4 Full Licence Key