What are the differences between InGaAs and EMMI in PD flow meter?

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1. Types and principles of flow meters

According to the measurement principle, flow meters can be divided into the following categories:

1. Mechanical principles: Instruments belonging to this category include differential pressure type and rotor type using Bernoullis theorem; The impulse equation and movable tube equation using the momentum theorem; Using the direct mass formula of Newtons second law; Target based on the principle of fluid momentum; Turbine type using the angular momentum theorem; Vortex type, vortex street type, etc. utilizing the principle of fluid oscillation.

2、 Electrical principles: Instruments used for this type of principle include electromagnetic, differential capacitive, inductive, strain resistance, etc.

3、 Acoustic principles: There are ultrasonic and acoustic (shock wave) methods that use acoustic principles for flow measurement.

4、 Thermal principles: There are various methods for measuring flow rate using thermal principles, such as calorimetry, direct calorimetry, and indirect calorimetry.

5、 Optical principles: Instruments such as laser and photoelectric instruments belong to this type of principle.

6、 Atomic physics principles: Nuclear magnetic resonance, nuclear radiation, etc. are instruments belonging to this type of principle.

7. Other principles include labeling principles (tracer principle, nuclear magnetic resonance principle), related principles, etc. Extended Data Flow Meter Market Factor: Driving Factors According to the International Energy Agency (IEA) forecast, a cumulative global investment of $26.0 trillion (in 2007 US dollars) is needed in energy infrastructure from 2007 to 2030. In the long run, foreseeable ener

2. What are the differences between InGaAs and EMMI?

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