What is barometer?

In what stores could I find a barometer and a hygrometer?

• I'm trying to find a cheap barometer and a hygrometer for a science project, but am having trouble locating them in local stores. Any ideas what stores would carry them? I'm in Atlanta, by the way.

• Answer:

  I would check Radioshack, which carries some various weather instruments. But some additional tips while you're looking...and if you decide to look somewhere other than Radioshack: 1) You'll probably have a hard time finding a stand alone barometer and hygrometer (especially the latter). Try doing a general search for "weather stations", and make sure they measure pressure and relative humidity, which are the two variables you are interested in. I have an indoor/outdoor weather station at home that measures temperature, relative humidity, and pressure...I believe it was from Radioshack for around $30. 2) Look for barometric pressure and relative humidity sensors. The average Joe would have no clue what a hygrometer is, so in your average stores it is not likely marketed as a hygrometer, but a relative humidity sensor. 3) I don't think you'll have a hard time finding a weather station that measure relative humidity...but just in case, keep in mind that if you know temperature and dewpoint, you can calculate the relative humidity. Hope that helps!