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An intervalometer is usually a handheld device with a long cord that plugs into a cameraâs auxiliary port. It looks and works very similar to a remote trigger release. The type of intervalometer youâll need depends on your type of camera.
Learning the difference between the two is the best way to determine what your exact needs are and which instrument will best fit those needs. A hygrometer is an instrument thatâs used to measure the level of moisture thatâs in a room. Its sole function is to give the user either a digital or manual read-out. You can either buy a hygrometer as a small unit that operates off of batteries, or a unit that can be placed on a shelf in order to get a quick readout.