ONICON Inc., a Harbour Group company, has acquired flowmeter manufacturer Greyline Instruments Inc. Terms of the transaction were not disclosed.

Greyline designs and manufactures ultrasonic flowmeters and level sensors that utilize Doppler, transit time, and area velocity technologies.  The company's customers operate primarily in the water, wastewater, environmental, and industrial markets. 

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Greyline was founded by Bill Robson and Ernie Higginson, and is based in Long Sault, Ontario, with additional operations in Massena, N.Y. Robson and Higginson will remain with the company, according to an official announcement.

ONICON is headquartered in Largo, Fla. and manufacturers a full line of flowmeters and energy measurement systems, including turbine, vortex, electromagnetic, thermal mass and ultrasonic meters as well as BTU meters and display modules.