bartbb,
Your 60 kPa (8.7 psi) sounds like it could be handled with ordinary household or municipal potable water supply. The flow rate is within a household faucet capacity.
It seems that the instruments that you need are a flow meter (your Dwyer flow tube), and a pair of pressure gauges (or piping and valves to select either the upstream or the downstream pressure tap.) Keep the pressure taps /gauge locations at the same elevation to avoid adding in-accuracy of head difference.
If a number of modules need to be tested on a production basis, then you might want to assemble a testing system with a pump and instruments. An elevated head tank at 8 to 10 meters along with a run down tank following the test module would allow re-cycling the water with a return pump. If you only have space for a single water tank, then the pump will need to be sized for the test flow and pressures.