GHL, the company behind the popular line of Profilux aquarium controllers just released yet another flow sensor. However, unlike the previous flow sensors that measured up to 300 to 5000 liters per hour (80 to 1300 gph). This new flow sensor allows you to measure Flow from 540 to 9000 LPH (143-2378 GPH). Pricing is expected to come in around $199 for the new flow sensor. Talk to your favorite GHL Profilux retailer about availability.