Greyline is a worldwide leader in ultrasonic instrumentation for industrial and environmental markets. We develop, manufacture and market industrial flow and level monitoring instruments including ultrasonic level transmitters, flow meters and open channel flow meters. Greyline’s primary market is environmental - especially water and wastewater treatment systems. Customers include industry and municipalities. Modern research facilities at Greyline include closed pipe and open channel flow systems. With years of steady growth, Greyline products are sold and supported worldwide.

About Us

We develop and manufacture industrial flow and level monitoring instruments for measurement and control in water and wastewater treatment, industrial process automation and for environmental monitoring.

Greyline level instruments include ultrasonic level monitors and transmitters, tank level monitoring instruments, pump station level controllers, software and data loggers.

Greyline's ultrasonic flow products include portable meters for troubleshooting and surveys, Doppler flow meters with strap-on sensors, flow switches, open channel flow monitors and area-velocity flow meters.


Greyline - Model MantaRay - Portable Area-Velocity Flow Meter

The MantaRay Portable Area-Velocity Flow Meter measures flow in open channels, partially filled and surcharged pipes using an ultrasonic sensor. It's designed for monitoring stormwater, sewage, industrial effluent, irrigation water and natural streams. The MantaRay displays and datalogs flow rate and total flow and connects to samplers, SCADA and telemetry systems. Calibration is simple: enter the pipe diameter or channel dimensions ...

Greyline - Model OCF 5.0 - Open Channel Flow Monitor

Continuously monitor, display, totalize and data log flow through any flume or weir. The OCF 5.0 includes a non-contacting ultrasonic sensor that mounts just 8' (203.2 mm) above the flowing water. It is accurate (±0.25%) and reliable. There is no obstruction to flow and no fouling. Use the built-in Keypad/menu system to select your flume or weir from the Menu and to choose measurement units (gallons, liters etc.).


Water accountability portable monitoring for solving flow rate mystery

The Glen Walter Sewage Collection System was built to service 1080 customers in 1989. At the time the population was 850 but by 1995 the sewage treatment plant had already reached capacity. Shawn Killoran took over the Operations Manger position in 1999 and, along with the Mayor and Council, he immediately had concerns about the excess flow.

Open Channel flow monitoring for wastewater treatment plant

After 16 years of service, the Long Sault WWTP replaced two older Greyline Open Channel Flow Monitors with new data logging OCF 5.0 models. This SBR treatment plant`s influent is measured with flow through two 6` Parshall Flumes.


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Company details

Business Type:

Industry Type:
Monitoring and Testing - Water Monitoring and Testing

Market Focus:
Globally (various continents)

Year Founded:

Office & Distributor locations:


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