| 摘要 |
The invention relates to a gas indicator with an indicator substance across which at least temporarily a gas flow can be led. The inventive indicator comprises an at least partially flexible cover which is provided with an opening. Said opening is sealed by means of a removable adhesive film. The indicator substance is located below said opening and at a distance thereof. The cover can be converted from an initial state with a minimum internal volume to a final state with a maximum internal volume by means of an expansion element. |
