About Liquid Controls and Avery-Hardoll

From its start in 1956, Liquid Controls, a unit of IDEX Corporation (NYSE:IEX), has been dedicated to providing high quality flow meters and accessories for accurate liquid measurement in both custody transfer and process control applications.  In December 2015, Liquid Controls acquired the Avery-Hardoll product line and is the manufacturer of Avery-Hardoll meter products.  Our manufacturing team is made of the most tenured and highly skilled craftspeople in the industry, and are supported by our dedicated in-house engineering and New Product Development (NPD) team dedicated to ensuring that our customers around the world are supported with technology and capability tailored our industry and customer requirements. 

Pioneers in Flowmeter Technology

Liquid Controls (LC) sold their first fuel flowmeter to the U.S. Air Force in 1956 while Avery-Hardoll got its start in Europe in 1932.  Since then, LC and Avery-Hardoll have grown to become global leaders in the aviation industry for the most accurate and reliable flowmeter systems and continuous innovation that enhances metering performance, increases safety, and streamlines data management. 

Leader in Measurement Accuracy

With proven measurement accuracy as low as .1%, Liquid Control’s Avery-Hardoll meters remain unmatched in maintaining the most accurate fluid measurement in the world.  The proprietary Avery-Hardoll meter design remains the industry benchmark that many try to emulate.  But "It's what's on the inside that counts".

Authority in Data Management

Liquid Controls is dedicated to providing our customers products that measure fuel and deliver fueling data wirelessly while ensuring the highest level of efficiency and data quality control.  By combining the world's leading flowmeters with the first built-in wireless data management system in FlightConnect®, our customers enjoy the luxury of having a single source of reliability when it comes to fuel measurement and seamless data reporting.


Liquid Controls, LLC, manufactures high-quality positive displacement flow meters, accessories, and flow electronics for accurate liquid measurement in both custody transfer and process control applications. Liquid Controls’ meters have proven track record of reliable performance, sustaining their accuracy and providing a remarkably low cost of ownership in the harshest fluid metering applications. Liquid Controls continues to build on over a half-century of application experience in the commercial aviation and military fueling industries by developing innovative, straightforward solutions that provide value to their customers.  For more information, visit www.lcmeter.com or contact us at lcm-flightconnect@idexcorp.com.  Liquid Controls, LLC is a wholly-owned subsidiary of IDEX Corporation (NYSE:IEX).