Automatic detection of moisture in compressed gas cylinder

A system to detect moisture level in a compressed gas cylinder comprising:

• a gas vent/fill line configured to be in fluid communication with a compressed gas cylinder:
• a vacuum system comprising a vacuum line and a vacuum pump connected to the vacuum line;
• a dewpoint monitor connected to a dewpoint line and the vacuum line;
• and
• more than one gas cylinder engagement valve configured to engage the compressed gas cylinder and the gas vent/fill line;
• a dewpoint diverter valve in fluid communication with the vacuum pump and vacuum valve, wherein when the dewpoint diverter valve is closed, compressed gas is diverted to the dewpoint monitor for moisture measurement;
• and
• pigtail shutoff valves in fluid communication with, and between, the multiple gas cylinder engagement valves and the compressed gas cylinders wherein opening or closing the pigtail shutoff valves allows for one or more of the multiple compressed gas cylinders to be selectively filled with compressed gas from a compressed gas source;
• wherein when a compressed gas cylinder is connected to the gas vent/fill line, the vacuum pump draws gas from the gas vent/fill line into the vacuum line and the dewpoint line, and into the dewpoint monitor, where the dewpoint monitor measures moisture content in compressed gas.

A system to detect moisture level in a compressed gas cylinder comprising:

• a gas vent/fill line configured to be in fluid communication with a compressed gas cylinder;
• a vacuum system comprising a vacuum line and a vacuum pump connected to the vacuum line;
• a dewpoint monitor connected to a dewpoint line and the vacuum line;
• more than one gas cylinder engagement valve configured to engage the compressed gas cylinder and the gas vent/fill line;
• more than one gas vent/fill line and vacuum line, wherein multiple compresses gas cylinders can be filled with compressed gas from a compressed gas source at the same time;
• and
• a dewpoint diverter valve in fluid communication with the vacuum pump and vacuum valve, wherein when the dewpoint diverter valve is closed, compressed gas is diverted to the dewpoint monitor for moisture measurement;
• wherein when a compressed gas cylinder is connected to the gas vent/fill line, the vacuum pump draws gas from the gas vent/fill line into the vacuum line and the dewpoint line, and into the dewpoint monitor, where the dewpoint monitor measures moisture content in compressed gas;
• wherein multiple compressed gas cylinders can be filled with compressed gas from a compressed gas source at the same time.