CO2 Cylinder Pressure Gauge

This standalone CO2 cylinder pressure gauge provides a quick and convenient way to check the remaining pressure in a CO2 cylinder without needing to connect a full regulator. Using a CGA320 connection, it threads directly onto the cylinder valve and provides an immediate high-pressure reading indicating how much CO2 remains. This is particularly useful for aquarists who maintain spare cylinders and want to verify fill levels before installation, or for checking a cylinder after an extended storage period. The gauge is calibrated to display pressure in both bar and PSI, and the robust construction is rated for CO2 high-pressure service. A practical workshop and storage tool for any planted tank hobbyist managing multiple CO2 cylinders.