The Sentinel CO2 Regulator controls the flow of C02 and regulates the amount of C02 with a precision flow gauge that can be set from 1/2 - 15 SCFH (standard cubic feet per hour). The color coded pressure gauge is easy to read and understand. Comes with a 6 ft power cord and 120 volt solenoid pre-wired. Ready to connect to a controller or a timer. Can be used with either 20 lb or 50 lb C02 cylinders. The C02-REG reduces the pressure from the cylinder from over 2000 psi down to 30 psi. Maximum inlet 3000 psi. Pick up your Sentinel CO2 Regulator today.