Liquid mass flow meter, we mean the mass flow meter can measure the flow rate of liquid, like the: diesel fuel, fuel oil, water, caustic, and gases/vapors. And we can use the thermal mass flow meter for the gas flow rates measurement. Coriolis mass flow meter is well known to everyone. Sino-Instrument offers liquid mass flow meters based on the Coriolis mass theory.
Features of SI-3141 Liquid Mass Flow Meter
1. Double-U or double-C flow tube ensures high accuracy and customer’s requirement.
2. Provides integrated mass flow, volum flow, density, temperature measurement and relative calculated parameter.
3. Easy on Installation, do not need rectifier and filter parts.
4. Fixed parts, maintenace free. High stability, no need for frequent disassembly calibration.
5. Allow low-range operation, reducing pressure loss and energy consumption waste.
6. Integrated installation, low installation costs.
7. Extremely high accuray and long-term stability, could be used for business transaction.
8. Ultra-wide measure range, could measure gas accurately.
9. Transmitter can be exchanged, and will not be influenced by area temperature.
Specification of liquid mass flow meter
Flange (ASME B16.5)
Mass Flow Accuracy
15:1 within measure ratio ±0.1%
15:1 beyond measure ratio ±(zero stability/instant flow rate) ×100%
Volume Flow Accuracy
Whole measure range ±0.15%±(zero stability/instant flow rate) ×100%
15:1 within measure ratio ±0.05%
15:1 beyond measure ratio ±1/2(zero stability/instant flow rate) ×100%
Note: Flanges in form are steel pipe flanges
Details of SI-3141 liquid mass flow meter
Standard mass flow
DPT100 [Accuracy 0.15, Chinese interface, IP65, Exde(ib)IICT6, Divided installation]
IPT200 [Accuracy 0.15, Chinese interface, IP65, Exde(ib)IICT6, Integrated installation]
IPT200 [Accuracy 0.2, Chinese interface, IP65, Exde(ib)IICT6, Divided installation]
IPT200 [Accuracy 0.2, Chinese interface, IP65, Exde(ib)IICT6, Integrated installation]
316L&304 Temperature-resistance 250℃
316L Temperature-resistance 350℃
316L&304 Steam heat tracing type
316L&304 Electric heat tracing
Sensor 220VAC Transmitter 24VDC
Process connection type
GB/T9115.1-2000 4MPa RF
GB/T9115.1-2000 6.3MPa RF
HG/T20615-2009 Class300 WN-RF
ASME B16.5-1988 Class150 WN-RF
ASME B16.5-1988 Class300 WN-RF
HG/T20592-2009 4MPa WN-RF
ASME B16.5-1988 Class600 WN-RF
Carbon steel flange, bolt and nut, metal gasket, 10m cable
Stainless steel flange, bolt and nut, metal gasket, 10m cable
Carbon steel flange, bolt and nut, metal gasket
Stainless steel flange, bolt and nut, metal gasket
Active circulation (4-20mA), active frequency (0-10KHz), RS485
Active circulation (4-20mA), RS485
Active frequency (0-10KHz), RS485
Passive frequency(0-10KHz), RS485
Active circulation (4-20mA), active frequency (0-10KHz), passive HART (DPT transmitter only)
Active circulation (4-20mA), active frequency (0-10KHz), active HART( DPT transmitter only)
Passive frequency (0-10KHz), active HART (DPT transmitter only)
Water contents measuring
Flow rate measuring
How does mass flow meter work?
Coriolis mass flowmeters measure the force resulting from the acceleration,
caused by mass moving toward (or away from) a center of rotation.
This effect can be experienced,
when riding a merry-go-round,
where moving toward the center will cause a person to have to “lean into” the rotation so as to maintain balance.
As related to flowmeters, the effect can be demonstrated by flowing water in a loop of flexible hose,
that is “swung” back and forth in front of the body with both hands. Because the water is flowing toward and away from the hands,
opposite forces are generated and cause the hose to twist.
They represent about 21% of all flowmeters sold.
In a Coriolis mass flowmeter, the “swinging” is generated by vibrating the tube(s) in which the fluid flows.
The amount of twist is proportional to the mass flow rate of fluid passing through the tube(s).
Sensors and a Coriolis mass flowmeter transmitter are used to measure the twist and generate a linear flow signal.
How do you calculate mass flow rate?
As shown, when a mass point of mass m moves at a velocity υ in a pipe that rotates at an angular velocity ω for the p-axis,
the particle is subjected to acceleration of two components and its force.
a. The normal acceleration is the centripetal force acceleration αr,
the magnitude of which is equal to ω2r, the direction is toward the P axis;
b. Tangential acceleration αt is the Coriolis acceleration,
the magnitude of which is equal to 2ωυ, and the direction is perpendicular to αr.
Due to the compound motion,
Coriolis Fc=2ωυm acts on the αt direction of the particle,
and the pipe acts on the particle with a reverse force of -Fc= -2ωυm.
When a fluid of density ρ flows at a constant velocity in a rotating pipe,
any pipe of length Δx will be subjected to a tangential Coriolis force of ΔFc.
Where A is the cross-sectional area of the pipeline.
Since the flow rate of the mass flow meter is δm, δm=ρυA,
Therefore, directly or indirectly measuring the Coriolis force generated by the flowing fluid in the rotating pipe can measure the mass flow,
which is the basic principle of the Coriolis mass flowmeter.
However, it is difficult to generate Coriolis force by the rotary motion.
At present, the product is replaced by a pipe vibration,
that is, a thin-walled measuring tube fixed by two broken ends,
at the midpoint of the measuring tube resonance or near resonance frequency.
Excitation, the fluid flowing in the tube generates Coriolis force,
causing the opposite direction of deflection in the front and rear half points of the measuring tube,
and electromagnetically detecting the amount of deflection to obtain mass flow.
Since the density of the fluid affects the vibration frequency of the measuring tube,
and the density has a fixed relationship with the frequency,
the mass flow meter can also measure the fluid density.
More mass flow meters
The Coriolis mass flow meter is a pipe-line transmitter,
that measures the flow rate by using the Coriolis effect principle,
that the fluid flows in the vibrating pipe to generate a proportional to the mass flow,
and is composed of a flow detecting sensor and a converter.
For direct mass measurement of industrial gases, compressed air, and aqueous fluids
Sino-Instrument’s thermal mass flowmeters,
made in China,
are suitable for all industrial and test rig applications,
that demand quick and precise gas measurement.
More digital liquid flow meter
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Sino-Instrument offer over 10 mass flow meters, with Best Price.
A wide variety of industrial flow meters options are available to you, such as free samples, paid samples.
All of our flow meters can wokrk with the AMS NEW TREX.
13% are Handheld ultrasonic flow meter,
and others are Liquid Turbine Flow Meters.
Sino-Instrument is mass flow meter suppliers, located in China.
Mass flow meter products are most popular in North America, Mid East, and Eastern Europe.
The United States, and India, which export 99%, 1%, and 1% of ultrasonic level transmitter respectively.
You can ensure product safety by selecting from a certified supplier,
with ISO9001, ISO14001 certification.