Authority in Aviation Fueling 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.

Avery-Hardoll Fuel Meters

Avery-Hardoll flowmeters are precision made, positive displacement, liquid measuring instruments manufactured by Liquid Controls, a unit of IDEX Corporation.  In 2015, Liquid Controls acquired the Avery-Hardoll product line and manufacturers the meters in its Lake Bluff, Illinois manufacturing facility. Since 1932, simplicity of design and construction together with sustained accuracy has led to the widespread use of Avery-Hardoll meter products including the BM Series meters and MASTERLOAD II™ electronic registers, on aviation refuelling vehicles throughout the world.  

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 good as 0.05%, 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 have struggled to emulate, because "It's what's on the inside that counts".



Connected Technologies in Aviation Fueling

The Slipstream™ Density Measurement System (SDMS) is an add-on active density measurement system for Avery-Hardoll MASTERLOAD III™ and Liquid Controls LCR 600 Flowmeters. 

FlightConnect® is an automated wireless dispatch and data management system that simplifies into-plane fueling efficiency and provides data accuracy on the ramp and in the back office.