There are three different types of hygrometers available on the market. All of them serve the same purpose (keep track of the humidity level inside your humidor) but operate slightly differently from each other. Below, we'll go over in more detail about each one:
Analog Hygrometer
Analog hygrometers are the most traditional and old-school way of keeping track of the humidity within your cigar humidor. This type of hygrometer has a round shape with humidity readings inside (just like a watch) and a needle that points to the current humidity level. They're also super user-friendly. Since it's an old-school solution, this type of hygrometer requires more frequent calibration than digital hygrometers.
Digital Hygrometer
A digital hygrometer for a humidor uses electronic sensors to measure the humidity levels, after which they are displayed on the device's screen. This type of hygrometer is powered by a battery and is typically more accurate than its more traditional analog counterpart. What's more, is that some digital hygrometers can also provide you with temperature readings.
Smart Hygrometer
Compared to analog and digital hygrometers, smart hygrometers are the newest and most innovative way to keep track of the humidity level inside your humidor. Smart hygrometers are very much the same as digital hygrometers, except they can be connected to your mobile device via Bluetooth or the Internet. That way, you can keep track of the humidity level inside your cigar oasis remotely.