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.

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Technical Articles

Application Note: Quarry Dewatering Compliance (Flow Sensing) Louis W. Bray Construction installed a Greyline Area-Velocity Flow Meter in 2009 to meet Ministry of Environment regulations. Their permit stipulated effluent limits plus monitoring, sampling and flow... (View Full Article)
Flowmeter Troubleshooting (Flow Sensing) An Ontario municipality deploys Portable flowmeters to solve flow rate discrepancies between pump station effluent and lagoon influent flowmeters. (View Full Article)