As the title says, I purchased an Alphacool 17558 ES and figured since it had a similar output it should work with the Aquastream... That's so far not the case... I connected my multimeter and I'm getting 160-164 impulses over pins 2+3 so I know it's working... Any idea if there is an adapter or such I should use to convert the output so the Aquastream in Flow sensor mode will understand the input? If not, any recommended flow sensors that are decent and available in the USA?