The hygrometer calibration sachet is a simple and foolproof method to accurately calibrate any digital or analogue hygrometer.
This calibration sachet uses the value of 62% as a standard for relative humidity, which is widely used by domestic and exotic bird breeders to determine the accuracy of any hygrometer (also known as the "salt test").

Instructions for Use:

1. Open/cut the clear bag and remove the Calibration Sachet from inside;
2. Place the Calibration Sachet and the Hygrometer inside a hermetic container (which ensures tightness when closed) like a glass storage jar or a bag with zip closure. Confirm that it is well closed and sealed;
3. Place the jar/bag in a room with a controlled temperature between 18-24°C and wait 24 to 36 hours;
4. If the hygrometer reads above or below 62% Rh, you should adjust or calibrate the hygrometer reading to obtain the 62% Rh.
5. A perfectly calibrated hygrometer will read 62% Rh, with a ±0.3% margin of error;

Note: You should record the date of opening of the sachet bag. The sachet bag can last from 60 to 90 days, depending on the type of preservation. The gel is known to have finished its function when its texture is no longer liquid, but contains small particles.