Assemblies adapted to be affixed to containers containing fluid and methods of affixing such assemblies to containers

A method of affixing an assembly to a container which contains a sample fluid, comprising the steps of:

• providing the assembly in or at an opening of the container;
• and
• affixing a particular sensor arrangement to the container without piercing a surface of the container by applying a contact pressure by the assembly to the surface of the container in a vicinity of the opening, wherein at least one portion of the particular sensor arrangement is situated within the opening of the container.

An assembly adapted to be affixed to a container which contains a sample fluid, comprising:

• a first arrangement positioned in a vicinity of an opening in the container;
• and
• a second arrangement which includes at least one portion situated within the opening, wherein the first arrangement is adapted to affix the second arrangement to the container without piercing an internal surface of the container by applying a contact pressure to the internal surface of the container.

A method of affixing an assembly to a container which contains a sample fluid, comprising the steps of:

• providing the assembly in or at an opening of the container;
• and
• affixing a particular arrangement to the container without piercing an internal surface of the container by applying a contact pressure by the assembly to the internal surface of the container in a vicinity of the opening, wherein at least one portion of the particular arrangement is situated within the opening of the container.