Five Key Factors Affecting the Service Life of Moisture Meters
extreme temperature
Although most hygrometers should function properly at "normal" indoor temperatures, they require a specially designed hygrometer to withstand the effects of temperatures below freezing or above the boiling point of water. For example, a hygrometer exposed to temperatures below -4 ° F or above 140 ° F will begin to return incorrect readings.
If there is no humidity meter specifically designed for extreme temperatures with severe high or low temperatures for a long time, it will not only reduce the accuracy of woodworking readings, but also cause persistent damage to the electronic components of the instrument, leading to long-term failure.
Exposed to moisture
Ironically, prolonged exposure to excessive moisture can actually lead to damage to the hygrometer. This type of damage can manifest in various ways, such as corrosion on the contact elements of a hygrometer (such as the pins of a needle gauge) or faults in the internal circuitry of the instrument itself.
Anyone who puts a phone in a swimming pool or other body of water can tell you that moisture and sensitive electronic devices cannot coexist well. However, you do not need to put electronic products into water to expose them to excessive moisture. Placing the instrument in a damp environment, such as a bag buried under damp work clothes, can cause damage over time, just like throwing it into water.
Damage caused by error handling
The five factors that affect the service life of moisture meters are shown in Figure 2. Although woodworking moisture meters are usually constructed as sturdy and durable long-term tools, improper on-site operation is still the main reason for the failure of these devices. This does not mean that such incidents are the user's fault; Accidents have indeed occurred, such as instruments falling onto hard surfaces or buckets.
However, taking preventive measures to avoid misoperation of instruments can greatly help prevent instrument malfunctions. For example, you can prevent accidents by firmly grasping the instrument and handing it over to colleagues who need to borrow it instead of throwing it into the room. Wearing gloves with gripping surfaces instead of gloves with smooth surfaces can also make it easier to avoid accidentally dropping the moisture meter during use.
Exposure to pollutants
This is a particularly sensitive issue for hygrometers, as their measuring components are less likely to be replaced than the pins on pin type instruments. Over time, when the thermometer is repeatedly exposed to chemicals, dust, mold, and other particles in the air, these substances can deposit on the measuring elements of the instrument. This results in inaccurate relative humidity readings provided by the instrument over time, a phenomenon sometimes referred to as "drift".
As the sensor drift becomes worse and worse, the instrument becomes increasingly unreliable, ultimately leading to the need to completely replace the instrument with a new one. Unfortunately, apart from minimizing particles in the air before using a hygrometer and keeping the instrument itself clean and in good condition, you cannot directly control exposure to pollutants.
