flowmeter selection

We need a flowmeter that will work on a skid package without power supply (only batteries)
DN200 , 200 m3/h, 14 bar
We have limited space (we can't handle upstream , downstream requirement)
what technology , model ?
any thoughts ?
 
You missed some critical information on flow meters.

What is the flowing medium, at what pressure and temperature?
How much pressure drop can the system tolerate?
How viscous is the medium?
Is it conductive or not? Is it a corrosive medium?
What minimum level of accuracy is acceptable? As number, not a verbal description, like ±10%.

This flowmeter has to work with only battery power - so what is the expected output of this flowmeter? visual indication like a pointer, a floating ball/disc or a digital readout? A signal powered by some other device?

How often can the batteries be changed?

One assumes a flow meter measures flow rate. How important is a totalizer?
 
No power supply?
Then you take a Rotameter from Yokogawa https://www.yokogawa.com/nl/solutio...ers/variable-area-flow-meter-rotameters/ragn/
Or do you need a measurement on i.e. a PLC.
There are lots of flowmeters available that have a rotating propellor that give pulses by each rotation. On the propellor is a small magnet that activates a stationary reed switch every time it passes it.
Then you take a digital input card, like this one, and have it count the pulses for you.
On certain defined times (i.e. every second, or 10 seconds) you read out the amount of pulses and rest the counter.
After that you have to multiply the amount of pulses per time unit with the amount of flow per pulse (that's a calibration you have to make).
When you want to make your life easy: take a meter like this, it also gives 4-20mA output signal.
See: https://www.yokogawa.com/solutions/...r-rotameters/ramc/#Downloads____downloads_739
 
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