Coriolis Mass Flow Meter Principle

The structure of Coriolis Mass Flow Meters was consisted of a pair of bended tubes. The principle is to detect Coriolis force which is forced on a pair of tubes from inner mass flow by fluid.

A new force-Coriolis force would be appearing while two conditions are met:

a. Vibrating with normal frequency in a pair of bended tubes,

b. Fluid flowing in tubes. This force was produced upon synthesis from vibrating force and flowing force by fluid in tubes. And tubes would be wresting symmetric the center line because the force forced. Two displacement sensors on sides of tubes detect the force and output electric signals.

The signals regulated and mass flow directly produced.

Main Technical Parameters

Medium: liquid, gas, solid, or two phases mixed fluid

Flow Accuracy :±0.2%~±0.1% flow

Density Accuracy: ±0.002g/cm³,±0.001g/cm³

Repeatability: ±0.10% ,±0.05%

Operation Pressure: (0~32) MPa (in case of other high pressure, it must be of special order)

Medium Temperature :-50°C~ +350°C,

Environment temperature :-20°C ~ +70°C for transmitters , and -40°C ~ +150°C for sensors

Output signal:

(1) 4-20mA current signal of flow, with load resistance ≤500Ω

(2) 0-10KHz, frequency signal of instant flow.

(3) RS485 Communication protocol

(4) Hart protocol

Power supply voltage: 24VDC

Material of measuring Tube: 316L stainless steel or hastelloy alloy C

Response time: 0.1s～5s, adjustable

Explosion-proof grade: EX d ib II C T5 Gb