BES Flowmeters supplies Flomec OM Series and Macnaught MX Series oval gear flow meters for precision viscous liquid measurement. With a $1.10 CPC and strong commercial demand, oval gear meters are one of the highest-value product lines in our range — trusted by Australian industry for fuel, oil, chemical and food-grade liquid measurement since 1986.
How Oval Gear Flow Meters Work
An oval gear flow meter contains two precision-machined oval gear rotors that mesh and counter-rotate as liquid flows through the meter body. Each rotation displaces a fixed, known volume of liquid. Pulses from the rotating gears are counted electronically or mechanically to calculate total volume and flow rate. The result is highly accurate, repeatable measurement that is independent of flow velocity, viscosity changes or turbulence.
Flomec OM Series Oval Gear Flow Meters
The Flomec OM Series is Australia's most popular oval gear flow meter range. Key specifications:
- Sizes: OM006 (6mm) to OM160 (160mm)
- Accuracy: ±0.5% of reading
- Suitable fluids: diesel, petrol, lubricating oil, hydraulic fluid, resins, adhesives, food-grade oils, chemical solvents
- Body materials: aluminium, stainless steel, PPS (chemical-grade)
- Display options: mechanical register, RT14 electronic rate/totaliser, RT40 electronic display with batch control
- Output: pulse, 4-20mA (with electronic display)
Macnaught MX Series
The Macnaught MX Series is an Australian-made oval gear flow meter range for fuel, oil and chemical measurement. Available in small, medium and large capacity models with digital electronic display options.
For the broader PD meter range, see our positive displacement flow meters. For all liquid measurement options, see our liquid flow meters. Request a quote or call (03) 5956 8685.
Frequently Asked Questions
An oval gear flow meter is a type of positive displacement meter that uses two precision-machined oval gears to measure flow. As fluid passes through, the gears rotate and each rotation displaces a precisely known volume of liquid. This makes oval gear meters highly accurate, particularly for viscous fluids and low flow rates.
Oval gear flow meters are best suited to viscous liquids including oils, fuels, hydraulic fluids, resins, syrups and solvents. They are also used for chemicals, lubricants and food-grade liquids where accurate batch or totalising measurement is required. They are not recommended for water or low-viscosity conductive fluids.
The Flomec OM series is a range of oval gear positive displacement flow meters widely used in industrial and commercial liquid measurement. Available in aluminium, stainless steel and chemical-resistant materials, the OM series suits a range of viscous fluid applications. BES Flowmeters is an authorised Australian distributor of Flomec products.
Basic oval gear flow meters with mechanical registers or pulse outputs require no external power — they are driven entirely by the flow of liquid through the meter. Electronic display versions and meters with 4–20mA outputs require a power supply. BES Flowmeters can advise on the correct variant for your application.
Yes — oval gear meters are widely used for batch dispensing and filling applications because of their high accuracy and repeatability. When paired with a batch controller, they can control fill volumes to precise tolerances. Contact BES Flowmeters to discuss the right oval gear meter and controller combination for your batch application.