OM Series Oval Gear Flow Meters
The FLOMEC® OM Series Oval Gear meters provide exceptional accuracy and repeatability in a wide range of applications measuring clean liquids.
Direct volumetric measurement from the positive displacement design gives you a flow measurement that is unaffected by changes in temperature, pressure, or viscosity – factors which can cause measurement errors in other flow meter technologies.
With a simple and reliable design concept using only two moving parts, they provide long service life and minimised maintenance costs.

Features & Benefits
- High accuracy and repeatability, measures every drop and saves waste in your process
- Low pressure drop, minimising pumping costs
- Extremely versatile design accurately measures high and low viscosity fluids
- No requirement for flow conditioning (straight pipe runs) gives a simple and inexpensive installation
- Only two moving parts provides a reliable product with minimal maintenance costs
- IECEx/ATEX models available, making the product safe to use in flammable liquid applications
Sizes & Flowrates
The FLOMEC® Medium Capacity OM-Series Oval Gear meters are well suited to precise measurement of fuels, oils, solvents, alcohols, mildly aggressive chemicals, and various other clean industrial liquids. Flow rates from 1L/min to 450L/min, combined with low pressure drop, weights and measures (A/NZ only) and various hazardous area certifications make the medium capacity OM-Series meters well suited to almost any liquid transfer or dispensing application whether pumped or gravity-fed.
Sizes 1/2” – 2” (15mm-50mm) Pipe Sizes | Flows from 1L/min – 450L/min with Pulse-Out or LCD display
OM Series Oval Gear flow meters are perfect for measuring the transfer of thick or non-conductive liquids.
Typical Applications Include Dispensing or Bulk Transfer of:
- Diesel fuel
- Petrol (gasoline) with or without ethanol content
- Biofuels
- Kerosene
- Glycols / Anti-Freeze
- Diesel Exhaust Fluid (DEF / Adblue)
- Lubricating oils and greases
- Edible oils
- Solvents
- Resins and adhesives
- Fertilizers, herbicides, insecticides
