Patent ID: 8763478

Claim:
A sampler for monitoring an environmental medium comprising fluid, the sampler comprising: a generally cylindrical housing having an axial dimension and a radial dimension, an outer axial side-wall, a cap and a platform at opposite ends of said side-wall, an inner stem coaxial with and inside the side-wall, and an annular space between said side-wall, inner stem, cap and platform; an adsorbent contained in the annular space for adsorbing at least one atom, ion, or molecule from an environmental medium around the sampler; and the inner stem having a passageway extending through the sampler for being received on an elongated support member for installing the sampler in the environmental medium with the environmental medium contacting the side-wall; wherein the side-wall is entirely or substantially fluid-permeable so that the sampler is adapted for fluid from the environmental medium to enter the sampler through the side-wall to contact said adsorbent inside the annular space.