![]() ![]() To do what you’re trying to do, you really care about the DIFFERENCE between the pressure at the base of the building, and at the top, or elevator location. To do this, you can permanently install a sensor at a known level (likely top or bottom for convenience) and then use a radio or wired communication to read the pressure at the known location and the pressure at the movable location at the same time, and subtract to get the difference. You can calculate the height difference of the two sensors fairly accurately with the difference between the two sensors. If you have an airport with AWOS reasonably close by, and can use the internet to pull the pressure from that location as your “known” pressure, you may be able to use that, but just know that the error will be increased when there’s a pressure front coming through, because the pressure will go up or down at one location before the other. ![]() If interested, you can use to find the AWOS or ASOS of a local airport… For example, shows that ASOS is available at PHONE 41. ![]()
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