| 摘要 |
<p>A pressure vessel for compressed gas comprising a shut-off valve, a pressure sensor, a temperature sensor, a programmable computing device with an associated display screen, a collar and a guard or retaining ring. The Guard or retaining ring is attached to the pressure vessel to hold the collar in place between the pressure vessel and the guard or retaining ring and the display screen is in the collar. The pressure and temperature sensors are in communication with the interior of the pressure vessel and generate first and second signals which are functions of the pressure and temperature in the vessel. The computing device calculates information concerning the amount of contents in the pressure vessel from first and second signals, and the display screen displays this information. The collar is a separate component from the pressure vessel and is placed on the top of the pressure vessel surrounding the valve.</p> |
