how do i calculate actual mass flow through a compressor without flowmeters?

[scubasteve4sq]

Hi Segei
it's a portable 2 ways ultrasonic flow meter. you can use it on liquid with the appropriate set of sensors.
a set of temp probes can be used to calculate the capacity for usual brines, capacity displayed and logged as the other parameters.

you can switch it to gas mesurement with an other set of sensors. a set will cover X to Y diameter and A to B wall thickness
http://www.flexim.com/en/devices/por...es/fluxus-g601
the difficult is that you need a straigth pipe to get a stable flow, you apply then an accoustic tape of about 800mm o the pipe. the flow is displayed in m3/h....you have then some calculations to do, like at school!

DSCN1133.jpg

this looks perfect, how much does a meter like this cost?