Can Rpi read mass flow meter ?

Is this this an automotive MAF sensor?  As I remember many of those are a resistor bridge with one arm in the Air flow, in that case it's a process of measurement of how out of balance the bridge becomes and that's an analog problem.

If you want to ensure you can read Pulses/Pulse rates or analog voltages at a fixed reliable rate I would consider using one of a million controllers  then offering it up  to the PI  for high level processing since you wouldn't need to worry about Linux latency issues presuming they are even an issue with your solution!

Answer is yes but you'll need to elaborate on what you are doing !

Does the meter support any physical interfaces?

Does the meter support any API interfaces?

Does the manufacture make any claims on their product?

Sean

Since I did not know, I post this for others to learn:

Coriolis mass flow measuring principle. The operating principle of a Coriolis flow meter is basic but very effective. ... When a fluid (gas or liquid) passes through this tube the mass flow momentum will cause a change in the tube vibration, the tube will twist resulting in a phase shift.

For more details see https://www.omega.com/en-us/resources/what-is-a-coriolis-flow-meter

Clem

It is not an automotive MAF sensor. It is a double tube coriolis meter for basically water and oil measurements. It does have a local interface showing massflow and volume readings. I plan to extend its features with my own controller to help me remotely get readings. Basically making it IoT complaint. Its is a generic flow meter with no claims on it.

Yes, a local interface with an LCD. Its a generic meter.

What electrical interface does it have?

here's the schematic and picture image of the electric interface.

As John said, the short answer is yes.  But whether the rPi is the best solution is a follow-up discussion.  Does the manufacturer tell you how fast the pulses are generated at normal flow?  The rPi is a Linux computer, so if pulses come very fast, it may be busy doing other Linux operating system things when it should be counting pulses.  A simpler microprocessor could be better for this than the rPi.

An alternate route could be, if the coriolis meter supports modbus, there are modbus libraries for the rPi.  You'd use the UART serial pins to talk Modbus.

Oh yes, based on his recommendations I would use a cheap nodemcu to read the pulse before sending it to the pi for more calculations. Or better still, I might just use the nodemcu for everything.

If the mass flow is proportional to the pulse rate, it may be tricky to measure accurate pulse times with a Raspberry Pi because Linux has processes that can interrupt most timing routines. It is sometimes easier to use external hardware for real time activities like pulse rate measurements.