Inst ToolsInst ToolsInst Tools
  • Ask
  • Courses
  • Videos
  • Q & A
    • Interview
      • Instrumentation
      • Electronics
      • Electrical
      • Practical Questions
    • MCQ
      • Instrumentation MCQ
      • Electrical MCQ
      • Electronics MCQ
      • Control Systems MCQ
      • Analog Electronics MCQ
      • Digital Electronics MCQ
      • Power Electronics MCQ
      • Microprocessor MCQ
      • Multiple Choice Questions
  • EE
    • Electronics
      • Electronics Q & A
      • Electronic Basics
      • Electronic Devices & Circuits
      • Electronics Animation
      • Digital Electronics
    • Electrical
      • Electrical Basics
      • Electrical Q & A
      • Power Electronics
      • Electrical Machines
      • Electrical Animation
      • Power Systems
      • Switchgear & Protection
      • Transmission & Distribution
  • Measure
    • Control Valves
    • Calibration
    • Temperature
    • Pressure
    • Flow
    • Level
    • Analyzers
    • Switches
    • Vibration
    • Solenoid Valve
  • Control
    • PLC Tutorials
    • Control Systems
    • Safety Instrumented System (SIS)
    • Communication
    • Fire & Gas System
  • More
    • Design
    • Tools
    • Animation
    • Basics
    • Formulas
    • Standards
    • TextBooks
    • Common
    • Software
    • Excel Tools
    • Erection & Commissioning
    • Process Fundamentals
    • Videos
    • Books
Search
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Reading: Oval Gear Meter – Principle, Advantages, Limitations, Applications
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • PLC Tutorials
  • Control Systems
Search
  • Ask
  • Courses
  • Videos
  • Q & A
    • Interview
    • MCQ
  • EE
    • Electronics
    • Electrical
  • Measure
    • Control Valves
    • Calibration
    • Temperature
    • Pressure
    • Flow
    • Level
    • Analyzers
    • Switches
    • Vibration
    • Solenoid Valve
  • Control
    • PLC Tutorials
    • Control Systems
    • Safety Instrumented System (SIS)
    • Communication
    • Fire & Gas System
  • More
    • Design
    • Tools
    • Animation
    • Basics
    • Formulas
    • Standards
    • TextBooks
    • Common
    • Software
    • Excel Tools
    • Erection & Commissioning
    • Process Fundamentals
    • Videos
    • Books
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Flow Measurement > Oval Gear Meter – Principle, Advantages, Limitations, Applications

Oval Gear Meter – Principle, Advantages, Limitations, Applications

Oval Gear Meter measures flow by using a geared rotor to pass known volumes of fluid through a housing. (Positive Displacement Flow Meter)

Last updated: October 31, 2023 12:46 pm
Editorial Staff
Flow Measurement How It Works
2 Comments
Share
3 Min Read
SHARE

Oval gear meters are traditional, mechanical, positive displacement (PD) flow meters, first invented more than 50 years ago by OVAL Corporation of Japan and now widely used for flow metering applications.

Contents
Oval Gear MeterAdvantages of OVAL Gear MeterLimitations of OVAL Gear MeterApplications of OVAL Gear Meter

Oval gear meters measure flow by employing a geared rotor to pass known volumes of fluid through a housing.

Oval Gear Meter

A very precisely adjusted gear pair within the casing forms the measuring element. The in-flowing medium causes the gear pair to rotate.

The rotary motion is scanned by contactless sensors. Since each individual tooth generates a pulse, this results in a very high resolution.

Consequently, even the smallest volumes can be measured or dosed precisely. The measurement unit contains two pick-offs that are circumferentially offset by ? a tooth pitch to generate a 2-channel flow-proportional frequency signal.

Suitable processing of the signal provides a greater resolution and the option to identify the flow direction. Basically, the measurement accuracy increases with an increase in the viscosity of the media.

Oval gear Flow Meter Principle

The oval gear flow meter comprises oval-shaped, geared rotors that rotate within a housing of specified geometry. Fluid differential pressure causes the intermeshing gears to rotate, trapping a ‘pocket’ of fluid between the gear and the outer housing and subsequently emptying the fluid pocket into the downstream flow.

The capillary action of the metered fluid forms a liquid seal. Each ‘pocket’ holds a precise and known volume of fluid so counting the pocket frequency gives a measurement of the volumetric flow rate. This is typically achieved by embedding magnets in the rotors, which then actuate a reed switch or provide a pulse output as they rotate.

Oval Flow Sensor principle

Advantages of OVAL Gear Meter

  • Traditional proven flow technology
  • Simple to install
  • No straight pipe runs are required so flow meters can be installed in restricted areas

Limitations of OVAL Gear Meter

  • Not suitable for steam or multi-phase fluids
  • Fluid slippage adversely affects accuracy; this varies with flow rate, differential pressure, temperature, viscosity, and clearance
  • Not recommended for low-viscosity fluids, including water or water-like fluids (because of an increase in fluid slippage)
  • Accuracy is adversely affected by bubbles present in fluids

Applications of OVAL Gear Meter

The oval gear flow meter is designed primarily for use with higher-viscosity fluids, which has led to applications such as the flow metering of oils, syrups, and fuels.

If you liked this article, then please subscribe to our YouTube Channel for Instrumentation, Electrical, PLC, and SCADA video tutorials.

You can also follow us on Facebook and Twitter to receive daily updates.

Read Next:

  • Flowmeter Control Strategy
  • What is Averaging Pitot Tube?
  • Basics of Venturi Flow Meter
  • Differential Pressure Flowmeter
  • Flow Transmitter Square-Root
Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !
Electro-Magnetic Flow meter Objective Questions
Pitot Tube Problems and Troubleshooting Steps – Flow Instrument
Difference between Invasive, Non-invasive, Intrusive & Non-intrusive
Orifice Flowmeter Rangeability
Pressure based Flow Meters
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
2 Comments
  • Yogi says:
    December 3, 2017 at 8:53 am

    In oval gear type flow meter,relation between frequency and flow

    Reply
  • David C Wishon says:
    June 7, 2019 at 5:35 pm

    Is the flow affected by the down stream pressure?

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
208kSubscribersSubscribe
38kFollowersFollow

Categories

Recent Comments

  • Guifty Shimica on Top Non-PLC Certification Courses for Automation Professionals
  • Guifty Shimica on Top Non-PLC Certification Courses for Automation Professionals
  • MIHARITSOA Aina Sitraka on Top Non-PLC Certification Courses for Automation Professionals
  • Vaishnavi on Free Instrumentation Course for Trainee Engineers

Related Articles

Rotameter

What is a Variable Area Flow Meter?

Tilt Level Switch Theory

Tilt Level Switch Working Principle

magnetic flow meter parts

What is a Magnetic Flow Meter?

Bernoulli's Principle and Flow Meters

Top Questions on Bernoulli’s Principle in Flow Meters

Types of Flow Meters

Types of Flow Meters

How a Δp flow meters works

What is Differential Pressure Flow Meter?

Proximity Switch Working Animation

Proximity Switch Working Animation

Open Channel Flow Measurement Animation

Open Channel Flow Measurement Principle

More Articles

Online Testing of Solenoid Valve

Design and Accessories Required for Online Testing of Solenoid Valve

Difference Between Microcontroller and Microprocessor

Difference Between Microcontroller and Microprocessor

Sulfur Hexafluoride Gas (SF6) Properties

Sulfur Hexafluoride Gas (SF6) Properties

Beam Balance Systems Objective Questions

Beam Balance Systems Objective Questions

Function of Racks in PLC System

Function of Racks in PLC – Types of SIEMENS S7-400 PLC Racks

Thermal Mass Flowmeter Principle

Thermal Mass Flow Meter – Principle, Advantages, Applications

FIFO in STL Language in Siemens PLC

How to Code a FIFO Queue in STL Language in Siemens PLC?

Flare KOD

Flare Knockout Drums Working Animation

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?