The two pressure gauges indicating cylinder pressure and output working pressure, easy to read the settingThe high quality bubble counter allows you to see the amount of gas being injected into the tank by counting bubbles per minute, so you can adjust the bubble rate as desired to create good growth conditions for your aquarium plantsAdjust the high-precision needle valve to control the amount of CO2 entering your aquarium, ideal for use in planted aquariums or any other applications that require precise CO2 controlEach kit contains a regulator, a bubble counter, a solenoid valve, a spanner and an O-ring. Industry standard nut, compatible with DIN 477 / BS 341 No. 8 / W21.8-14 (covers UK and Europe)It will take a few minutes to release the gas trapped inside it when the solenoid is powered off. If you have any questions about this item, please feel free to contact us, we are always here to assist you.Product DescriptionDual Gauge Pressure IndicatorsDual pressure gauges help you check the working and bottle pressure simultaneously. Cylinder Pressure Gauge: 0~25 Mpa/0~3500 psi Outlet Pressure Gauge: 0~1 Mpa/0~150 psiFine AdjustmentThe high-precision needle valve is quite sensitive, so only small movements are needed to alter the rate of CO2, which can help you achieve the best regulation of the number of bubbles per minute.Easy SetupPremium CO2 regulator comes with a wrench for easy installation. Interface: W21.8 Power Adapter: 12VComes with a 12V power adapter for safe and stable working performance.Read moreTop tips: