Hello, I have the flow sensor from you, the link is below. I connected it as described, installed the 5mm nozzle. How do you calculate the rpm in liters of what flows through with the 5mm and 8mm nozzle? I looked and found nothing. The sensor wasn't cheap, why is there nothing in the description about how much flows through with the 5mm and 8mm nozzle. Greetings from Switzerland