Independent technical reference. Not affiliated with, endorsed by, or a distributor for Liquid Controls. No product is offered; this page describes the meter's technology.
The M10 is a mid-range rotary positive-displacement meter in the Liquid Controls M-series, sized for petroleum and LPG transfer where high accuracy and provability matter. This page summarises the technology and where the M10 fits.
Operating Principle
The M10 is a rotary PD meter: rotors sweep a fixed volume per revolution inside a precision chamber, and a register totalises the count. Because volume is measured directly, the meter is linear, needs no straight run, and holds accuracy across a wide range even as fuel viscosity changes with temperature — typically ±0.2–0.5% of reading with excellent repeatability.
Where the M10 Sits
In the M-series ladder, the M10 is a step up from the M7, suited to lines around 2–3 inch and mid-to-high transfer flows. Above it sit the M40 and larger bulk meters. All share the same measuring principle and accessory ecosystem — registers, preset controllers, air eliminators, strainers and temperature compensation — so a site standardised on the M-series can mix sizes while keeping one set of spare parts and one proving procedure. That commonality is a large part of why the family remains popular for fleets of delivery vehicles and multi-bay loading terminals.
System and Care
An M10 is deployed as part of a metering system meeting OIML R117 / API MPMS intent for custody transfer. Keep fuel clean with a strainer, strip vapour with an air eliminator, avoid pressure surge, and prove the meter periodically. See the Liquid Controls overview and calibration pages for the wider context.