On Sunday, November 8, 2015 at 3:21:14 AM UTC-6, Don Y wrote:
I need a (cosmetic) cover for a wall/ceiling mounted "air sampling station".

In a sense, this is similar to what a smoke detector does (i.e., a smoke
detector "samples the air" for signs of smoke) so I started looking at
those for ideas.

But, I don't want anything that resembles a smoke detector too much
lest it be thought of *as* a smoke detector (leading to a false
sense of security). So, I've been looking for more visually
distinct "enclosures"/covers. For example:

https://upload.wikimedia.org/wikipedia/commons/1/17/Smoke_detector,_Russia.JPG

http://www.ontariooregon.org/images/Fire/smokedetector.gif

http://image.dhgate.com/albu_398144475_00-1.0x0/ufo-wifi-camera-security-photoelectric-cordless.jpg

The first looks like it would be the best choice as it *least*
resembles a smoke detector (at least in the US!)

Any other suggestions as to similar devices that I might want to consider?

Round ceiling speaker grill. It has holes in it that can be used for intake and exhaust. Air filter material can also be put behind it. ^_^

http://www.amazon.com/Parts-Express-.../dp/B0002BSQUI

[8~{} Uncle Grill Monster