Hi everybody!
I'm a first time user for the Aquacomputer products.

I recently bought an Aquacomputer MPSFlow 400 (order nr.93024552 - 21.05.201
I have a problem with this sensor.
The sensor is connected to an Aquaero 6 LT with the original Aquabus cable and to the motherboard with the usb cable. It is connected to the liquid system with 2 G1/4" fittings and 14/10 straight tubes.
The temperature of the cooling liquid is correctly detected.
The flow sensor doesnt' work well.
I manually configure the sensor in the Aquasuite software: switch off the pump, click the "Set current flow as zero" button and switch on again the pump. The detection of the flow starts working for a few minutes (about 100lt/h in aquasuite), then it drops to zero and never change. I can only make a new zero configuration, but it works for the same few minutes.
You can see the problem in the screen below:


Is there a problem in my configuration ? Or in the sensor?
How can I solve this issue?
Thanks for your help.

I have an Alphacool D5 pwm pump at 2000rpm, 1 EK supremacy evo waterblock, 1 360mm rad. They are connected with 6 45° fittings and 2 straight fittings on the mps400.
When the sensor works, it detects 100lt/h. And the pump always run at that fixed speed. So the flow must be always the same...

It's not so easy...
My D5 pwm isn't compatible with pwm standards and I can't setect the speed. It can run at actual speed or it switches off... I have to make the mod and use the pump like a 3 pin fan (voltage controlled)

No, without that mod the pump doesn't receive a good pwm signal and runs at a fixed speed.
After that mod, I can use the "Power controlled"...

Tomorrow I'll try the mod and see what happens

Problem solved...
I made the mod to my pump. Now it runs from 3500 to 4800rpm and I have readings from 190 to 270lt/h.
Maybe the 100lt/h are too near the minimum value that the sensor can read...