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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.
by: Rake. Hygrometer is basically a device that is used to measure the humidity of a particular place. Humidity is basically the moisture content in the air. The olden ways of measuring this was used by metal strips and now we have got electronic apparatus which works with the help of sensors.