Before putting your humidor into operation, you should check that it is set correctly. The correct calibration depends on the type of humidor: a distinction is made between analog and digital hygrometers.
Let’s start with the analog Adorini hygrometer, with which most humidors are fitted as standard. There are three variants:
- Analog hygrometers with metal spiral are the simplest and cheapest version, but unfortunately, often does not work precisely.
- Analog hygrometers with natural hair are somewhat more accurate in the measurement but must be regularly checked and readjusted.
- Analog hygrometers with synthetic hair are the most reliable and have the highest accuracy. The humidors of the de Luxe series are all equipped with this system, which is already calibrated before delivery. However, it can always happen that a readjustment is required by transport.
For the first two models, none will work well in the long term unless calibrated regularly. Six months is considered a reasonable distance for a calibration. All analog hygrometers have a screw on the back, which is used for recalibration.
Calibrate analog hygrometers
Wet towel method
The room should be draft-free and have a constant temperature. So make sure that the windows are closed. Using a thermometer, you can see if the temperature in the room is constant. Fulfill the two requirements, wrap your hygrometer in a damp towel or rag and place it on a surface. After two hours, the humidity meter would have to have a relative humidity of 98%. Unwind the towel. If the value deviates, adjust it to 98%. When you have finished, you have calibrated your hygrometer. Incidentally, this method is most natural to set.
Note: If you remove the damp towel or the damp cloth, you must quickly adjust the value to 98%, since the humidity then drops very quickly. For calibration, you only have about 10 seconds.
- Put the hygrometer in a wet cloth for about an hour.
- Ideally, wrap the hygrometer and wet rag with a plastic bag to ensure even moisture.
- Now quickly set the hygrometer to 98% relative humidity. Make sure that there is no draft and that the temperature remains as constant as possible.
There are different ways of the salt method. We recommend the following method to calibrate your hygrometer easily:
- Prepare a shot glass.
- Fill in a tablespoon of salt.
- Add a few drops of water.
- Stir salt and water.
- Place the shot glass in a lockable plastic box or foil pouch. Place the hygrometer next to it and seal the box/foil bag airtight.
- After approx. Eight hours, a humidity of approx. 75% should have developed. Calibrate the needle now.
Tip: The advantage of the plastic bag is that you can calibrate with a screwdriver through the bag without having to remove the hygrometer. Thus, there is no danger of fluctuations in humidity.
Another salt method
Another method with salt or saline to calibrate the hygrometer is the salt method with a saucepan or container. Take a 5-liter saucepan or container and pour in so much water until the water level has a height of about 5 mm. Now add so much cooking salt until it does not dissolve any more (per 100ml of water about 40g of salt). Now place a kind of “pedestal” in the saucepan to deposit the hygrometer there. The hygrometer must not have direct contact with the water. Next, cover the cooking pot, for example, with plastic wrap, airtight. It is essential that the temperature in the room is about 21 ° C and is constant. Also, there must be no breeze. After about 4 hours, the relative humidity in the saucepan has a value of 75%. If your hygrometer now displays a different value, you have to set it to 75%. To do this, quickly remove the cling film and set the moisture meter to 75% within approx. 10 seconds.
Calibrate digital hygrometers
Digital hygrometers usually do not need to be calibrated. However, you need a certain amount of time in the humidor to determine the exact humidity.
For both systems – digital and analog hygrometers – it should be noted that fluctuations of up to 3% can always occur, depending on the temperature. The best test is still to press the cigar at the end of the fire to see what consistency it has.