4-5 Professional advice
If you feel that the gas used in your experiment decreasing faster than ever before, immediately check the valve and piping.
Especially if a resin tube is being used as a retrofit, it is good idea to check the tightness of the tubing.
Leakage can occur if the tube is not made of proper materials.
Regular check is recommended, especially for flammable gas lines such as the city gas, propane gas, hydrogen, and oxygen.
4-5 Advice for
Initical support/correspondence
If the cause cannot be determined, consult with the lab manager or the facility administrator and ask a specialist to investigate gas piping.