What is rotameter？The main measuring element of the glass rotameter with transmitter is a vertically mounted conical glass tube and a float that can move up and down. When the fluid from the bottom up through the conical glass tube, in the float between the upper and lower pressure difference, the float in this differential pressure under the action of rising. When this rising force, the buoyancy force and viscous force on the float and the float's gravity equal, the float is in equilibrium position. Therefore, the flow of fluid through the glass rotameter and the float rise height, that is, with the glass rotameter circulation area between a certain proportional relationship, the float position height can be used as a measure of flow. There is also a very important point is that the glass rotameter in the flow meter, the price is relatively cheap.

Metal tube rotor flowmeter, listen to the name, which is also rotor flowmeter, metal tube rotor flowmeter for DN200 within the small diameter and low flow rate medium flow measurement; reliable work, low maintenance, long life; for straight pipe section requirements are not high; wider flow rate ratio 10:1; two lines of large LCD display, optional field instantaneous / cumulative flow display, can be with backlight single axis sensitive indication; non-contact magnetic coupling transmission; all-metal structure.

So what is the difference between them? First of all, the pressure resistance, glass tube rotameter is, after all, glass scale tube, fragile in transit, the use of the process of working pressure can not be too high, glass rotameter flow transmitter according to different calibers have different pressure resistance, according to different glass turn pressure resistance between 0.2Mpa to 1.0Mpa.

Scale display: glass tube rotameter, the glass tube is transparent, so are directly calibrated on the glass tube scale line, the float location is of course the size of the flow. Metal tube rotor flowmeter because the measuring tube is made of stainless steel.

Applications: glass rotor flowmeter is mainly used in various sectors such as chemical, petroleum, light industry, pharmaceutical, fertilizer, chemical fiber, food, dyestuff, environmental protection and scientific research, etc., used to measure the flow of single-phase non-pulsating (liquid or gas) fluid. Anti-corrosion glass rotor flowmeter is mainly used for corrosive liquid, gas medium flow detection, such as strong acid, strong alkali, oxidizing agent, strong oxidizing acid, organic solvents and other corrosive gas or liquid medium flow detection.

Metal tube rotameter transmitter is suitable for high temperature, high pressure and strong corrosive media; can be used for flammable, explosive hazardous occasions; optional two-wire system, battery, AC power supply; multi-parameter calibration function; with data recovery, data backup and power failure protection function.

Another point is that the glass rotor flowmeter is without signal output, while the metal tube rotor flowmeter is different, can be with remote signal output, 4-20mA, can be connected to the PCL system to set the alarm function.

Specific flowmeter selection, to choose from the performance of the flowmeter, the function up. To choose the correct flowmeter according to the actual working conditions of the demand.

Want to know more about rotameter flow transmitter,knowledge about difference between rotameter and flow meter.