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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.
Manometers A manometer is a device that measures pressure, typically atmospheric pressure. Manometers have been used for centuries and come in a variety of designs, from older glass tubes containing mercury or water to new digital devices. Barometers. Like a manometer, a barometer also measures atmospheric pressure.