Micro flow meters for Low Flow Indicating is a big challenge for the manufacturing industry. The smaller the flow, the more difficult the measurement.

Micro flow meters for low flow liquids

Commonly used Micro flow meters for low flow liquid flow rate include positive displacement/oval gear, mass flow meter, and ultrasonic flow meter.

Sino-Inst offers a variety of  Micro flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Featured Micro flow meters for Sale

Further reading: Industrial LPG/Propane flow meter

Microflow meter is also called a microfluidic flow meter or a low flow meter. The Micro flow meters we are going to discuss here mainly include gear flow meters, turbine flow meters, ultrasonic flow meters and mass flow meters.

How to choose a suitable Microflow meter depends on your actual measurement requirements. Let us analyze it together.

Ultrasonic flow meter for Micro flow

Strap on flow meter X3 is a kind of ultrasonic external clamp-on flow meter. Strap on flow meter X3 is easy to install. Suitable for measuring pipe diameter Φ9.53~Φ90.

ProductStrap on Flow meter
Flow range0.1m/s~5.0m/s
Pipe sizeφ6.35~φ90
Data storageDaily, monthly, and Annual. Flow Totalizer
Analog output4~20mA, Maximum load: 600Ω
Alarm outputDCT, Upper and lower limit alarm function(optional)
CommunicationRS485,support Modbus communication protocol
Power supply24VDC
Cable length2.0m
KeypadFour light touch buttons
ScreenOLED 128*64 displayscreen
UnitsMetric and imperial units are available, Cubic Meters(m3), Liters(L), USA Gallons(GAL)/hour,/min,Default unit setting:m3/h
TotalizerSix bit digit
Piper materialStainless steel pipe, carbon steel pipe, copper pipe, plastic pipe
Case materialAluminum alloy
Environment temp.0℃~50℃(32°F~122°F)
Medium temp.0℃~50℃(32°F~122°F)
Environment humidit0-95% relative humidity, without condensation
IP GradeIP54

Turbine Micro flow meter

The micro flow meter is a special flow meter designed to measure the micro flow using the turbine principle. It has extremely high accuracy, especially under high temperature and high pressure conditions. Due to the smart structure design, no precipitation will be formed during work, so the work of the instrument is completely “clean”.

Turbine Micro flow meter
MaterialShell: brass nickel plated/brass/plastic

Bearing: INO×18/8 (1.4305) stainless steel

Impeller: PVDF (polyvinylidene fluoride)

Magnet: SrFeO ceramic, ultrasonic welding
sealMVQ (silicone rubber “O” ring)
temperature range-10℃~+100℃
Accuracy class±2%
Pressure rangeMaximum 2MPa
Installation methodHorizontal installation
Dimensions (L×B×H)40×55×40mm
connectionMPM connector
Provide power4.5~24VDC
OutputOpen collector
Maximum (extra) voltage output25VDC
Maximum current output25mA
ThreadG1/8 or G1/4

Know more about: Turbine type Flow Meter

Micro motion flow meter

Micro Motion Coriolis Flow Meter is a flow meter made according to the Coriolis acceleration theory. Z-Series Straight Tube Micro Motion Coriolis Flow Meter simultaneously measures mass flow, density, temperature and viscosity.

Liquid Accuracy / Repeatabilityup to ±0.2± of rate (up to ±0.1± of rate)
Gas Accuracy / Repeatability±0.20± of rate
Density Accuracy / Repeatability±0.002 g/cm3 (±0.0005 g/cm3)
Line Size1/4″ (DN8) – 2″ (DN50)
Pressure Rangeup to 1450 psig (100 barg)
Temperature Range-60 to 300 F (-51 to 149 C)

How does micro motion flow meter work?

The micro-motion mass flowmeter is a flowmeter made according to the Coriolis acceleration theory. There is a straight tube that rotates in a plane around a fixed axis O at an angular velocity w, and a particle in the tube moves outwards along the straight tube at a speed v. Because The mass point m is in a system with both rotational motion and linear motion, so it will obtain two accelerations.

Serving size:

① Centripetal acceleration a, its value is rw^2 (r is the distance from the particle m to the axis O), and the direction points to the axis O.
② Tangential acceleration ac, its value is 2uw. The direction is perpendicular to a, it comes from the rotating pipe. At the same time it produces a reaction force to the pipe. This reaction force is the Coriolis force. Its calculation formula is:

F=2muw —————-(3-8)

F is Coriolis force, N;
w is the angular velocity, 1/s;
u is the radial velocity in the rotating system, m/s,
m is the mass of the moving object, kg.

If the density of the fluid is p, the tangential Coriolis force on any section of pipe △x is:

△F=2pA△xuw ———(3~9)

A is the cross-sectional area of ​​the pipe.

In the formula (3-9), pAu is the natural flow rate of the fluid, set as QM’, then the formula (3-9) can be expressed as:

△F= 2w△xQm————-(3-10)

From the above equation, we can know the mass flow Qm as long as the Coriolis force △F is measured. This is the measuring principle of micro-motion mass flowmeter.

Gear flow meter for Micro Flow

Micro Flow Meter is a micro oval gear flow meter. DN4-DN10. Suitable for flow measurement of various low-flow liquids.

Micro Flow Meter has strong adaptability to the viscosity of the liquid to be measured. There is no special Especially suitable for automobile fuel consumption, boiler fuel, medicine, food, chemical raw materials, wine, milk, vegetable oil cans Accurate measurement of small flow rates of various liquids.

Diameter (mm)Flow Range(L/H)

Of course, if the medium you need to measure is not a small flow rate. Then you can consider using other types of flow meters.

For example, if you need to measure the waste water flow of a 2-inch pipe, then you can refer to: Magnetic Flow Meters Guides.

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Extended reading:
What is the K-factor in a flow meter?
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Sino-Inst, Manufacturer for Microflow meters for low flow liquids. For example crude oil flow meter, diesel flow meter, gasoline flowmeter.

Sino-Inst’s Microflow meters for low flow liquids, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

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Please provide your measurement parameters or details. Sino-Instrument support customer customization and OEM
Please provide your measurement parameters or details. Sino-Instrument support customer customization and OEM

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