1: Exposure to pollutants
This is a particularly sensitive issue for thermal hygrometers, as their measuring elements are less easily replaceable than the pins on pin-type meters. Over time, when a thermo-hygrometer is repeatedly exposed to airborne chemicals, dust, mold, and other particles, these substances can deposit on the meter's measuring elements. This results in inaccurate relative humidity readings provided by the meter over time, a phenomenon sometimes referred to as "drift".
As the sensor drifted worse and worse, the meter became less and less reliable, eventually leading to the need to completely replace the meter with a new one. Unfortunately, you cannot directly control your exposure to pollutants other than to minimize airborne particles before using a hygrometer and keeping the meter itself clean and in good condition.
2: Storage conditions
When your hygrometer is not in use, where is it stored? Storage conditions are an important part of proper care of any sensitive device, and a hygrometer is no exception. When it comes to storing a hygrometer, every item we've discussed in the above section is important.
For example, store a hygrometer in a hot, damp, dirty box that sits loosely in the back of a truck, bounces haphazardly, and doesn't last nearly as long as a meter kept in a proper suitcase . Delmhorst's hygrometers come with cases to protect the work between them.
However, storage doesn't just mean you keep the meter between two jobs. At work, do you keep the meter in a utility belt bag while on the move? Keeping the meter in a pouch not only frees your hands for climbing ladders and other activities, it also keeps your hygrometer in a safe location where it will be exposed to less contaminants, not to mention There are fewer opportunities to discard.
