Rebecca from SanFranciscoAQ.com installed a Purple Air sensor behind one of the back windows, behind the VR green screen. There’s a cord going through the window so you can’t close it all the way anymore. But it’s on the other side of the building from the fire escape so I think the security implications are minimal.
This sensor is part of a project paid for by a California Air Resources Board to compare cheaper sensors (purple air costs $200) with the more expensive traditional $10,000 sensors, to see if they are comparable.
Please don’t hack this sensor set up. Ask me or Rebecca (her business card is taped on the window) if you have any questions.