Micro flow meters for low flow liquids

Micro flow meters for low flow liquids

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

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

A 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”.

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)
Read more about: The Pros and Cons of Micro Motion Flow Transmitters

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.

Extended reading: U-series Liquid Mass Flow Meter | Liquid-slurry flow measure

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)

Extended reading: Turbine Insertion Flow Meter for Large Diameter Pipeline

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 wastewater flow of a 2-inch pipe, then you can refer to Magnetic Flow Meters Guides.


A low flow meter is a meter specially used to measure small flow. There are many common flowmeters suitable for measuring tiny ones. Such as differential pressure type, float type, volume type, and so on. Some of these flow meters are suitable for measuring large flow rates. It is also suitable for measuring small flow. Others specialize in designing solutions for measuring small flow rates.

Flow rate meter, also known as “flow meter”, is an instrument that measures the speed of water flow. There are many kinds of models by and flow meter. For example, there are two types of rotary cup type and rotary paddle type flow meters commonly used in hydrological stations.

Liquid flow meters refer to instruments that can be used to measure the volume flow or mass flow of liquid media.

Flowmeter is one of the important measuring instruments in process automation instruments and devices. According to the physical properties of the measured medium, it can be divided into liquid flow meters and gas flow meters.

Among them, there are many types of liquid flow meters. Common liquid flow meters are vortex flowmeter, turbine flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, positive displacement flowmeter, differential pressure flowmeter, rotameter, open channel flowmeter, Coriolis mass flowmeter Wait.

Extended Reading: Sanitary Flow Meters for Beer, Wine and Spirits

There are many methods and tools for measuring and controlling liquids. But it should be selected according to the actual working conditions on-site. Every instrument that measures liquid flow has its own characteristics. Choose according to its applicable characteristics. Only in this way can the performance of the instrument be brought into play.

There are many types of flowmeters, the most commonly used are as follows: 1. Electromagnetic flowmeter 2. Vortex flowmeter 3. Ultrasonic flowmeter 4. Orifice flowmeter 5. Precession vortex flowmeter

The user must provide the following parameters to select a suitable flowmeter.

  1. What medium to measure
  2. Measure the temperature of the medium, medium density, viscosity, etc.
    3.Measuring medium: pressure.
  3. Measure the minimum flow rate of the medium, the common flow rate and the maximum flow rate
  4. Measure the pipe diameter
  5. Requirements for instrument power supply and output signal
  6. Requirements for meter display and measurement accuracy
  7. Whether there is a signal interference source at the installation site, and whether it meets the conditions for on-site installation of the flowmeter

The user gives the above parameters, Sino-Inst, as a manufacturer of flow meters, can select a suitable flow meter for you. Below we introduce the above several common flow meters are usually used in which medium measurement.

Read more about: Demineralized Water Flow Measurement Case Study

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Industrial LPG/Propane flow meter

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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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About KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects. Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.