Let’s face it: Most of us are mildly obsessed with fuel consumption, and the more information we can get, the better. 

Today’s modern diesels calculate this data via electronic control units and other sensors to provide an estimate of fuel burn. For exact, real-time data, Airmar has a solution. 

SmartFlex Diesel Flow Meters are available in single- or dual-chamber models, and for single- or twin-diesel configurations. Each model comes with a status light or an LCD display. The design includes a dual chamber with supply and return in one housing for a streamlined installation and no need for separate senders. 

An Airmar SmartBoat module is required to connect the flow meters to a boat’s NMEA 2000 system. Brass and alloy housing options are available, as are threaded or flanged connections. airmar.com

This article originally appeared in the July/August 2025 issue of Passagemaker magazine.