OG5 Oval Gear Positive Displacement Flow Meters

OG5 Oval Gear Flowmeters

The compact OG5 oval gear liquid flowmeter gives high performance, excellent chemical resistance and has high viscosity options available for liquids above 1000cSt. This oval gear flow sensor has a standard flow range from 0.5 to 100 L/min on 30 cSt oil and 4 to 100 L/min on water-like liquids. With variable high pressure models up to 700 bar in standard 316 Stainless Steel with Viton™ ‘O’ ring seal and a standard 1″ process fitting size, options for Aluminium or PEEK materials and sensors suitable for hazardous areas are available. For OEM applications other alternatives are available, including high pressure options and manifold mountings.

Download the OG5 Datasheet

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OG5 Oval Gear Flow Meters Are Ideal for:

  • Engine test
  • Oil flow
  • High viscosity liquids
  • OEM equipment
  • Hazardous areas
  • Batching


  • Excellent chemical resistance
  • Rugged construction
  • Individual calibration
  • High viscosity options
  • Low pressure drop
  • No flow conditioning required
  • Compact meter assembly
  • Hall, reed switch or Namur sensor
  • Accuracy
    • 0.75% reading water
    • 0.5% reading oil
  • 0.1% repeatability
  • IP65/NEMA 4 protection
  • High Pressure Models to 700 Bar

Technical Data & Downloads

Technical Specification

Sample Model
(product codes)
Flow Range - Water
Flow Range - 30 cSt Oil
Accuracy - Water
Accuracy - 30 cSt Oil
RepeatabilityDetector TypeTerminationsApprox. 'K' Factor
Stainless Standard
4.0-1000.5-100Body - 316 St St
Gears - Carbon filled PEEK
Seal - Viton™
Magnet - Ceramic
± 0.75 % Reading± 0.5 % Reading± 0.1Hall EffectVia M20 cable gland78
Aluminium Standard
4.0-1000.5-100Body - Aluminium
Gears - Carbon filled PEEK
Seal - Viton™
Magnet - Ceramic
± 0.75 % Reading± 0.5 % Reading± 0.1Hall EffectMIL style instrument socket78
PEEK Standard
4.0-1000.5-100Body - PEEK
Gears - Carbon filled PEEK
Seal - Viton™
Magnet - Ceramic
± 0.75 % Reading± 0.5 % Reading± 0.1Hall Effect4 Pin M12 connector 78


Product Data Sheet – Specification & Order Codes

Product Instruction Manual

Technical Drawings – STP File


Trouble-free Installation and Commissioning of Your Flow Meter

Prior to installing the flow meter, read the Instruction Manual and refer to the following Installation Checklist to prevent avoidable failures due to mis-wiring etc.

For technical issues, refer to our Troubleshooting section or email technical@flowmeters.co.uk

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