What does dirt compensation or dirt forecasting mean?

Dirt compensation
Our smoke alarms constantly monitor any dirt and dust within their measuring chamber. If dirt particles are detected in the chamber, their alarm threshold is adjusted so that the distance to the basic signal always remains the same. The smoke alarms from QUNDIS do not become more sensitive due to dirt, with the result that their operating time is increased many times over. In this way, false alarms can be avoided as far as possible.

Dirt forecasting
Our smoke alarms can determine the condition of their measuring chamber by means of the so-called alarm threshold tracking. For this purpose the device measures at regular intervals how heavily the measuring chamber is clogged with dirt particles – the greater the amount of dirt, the more the alarm threshold is lowered. During the annual function test, the devices automatically make a forecast as to whether they will be able to function for another 15 months if the level of dirt remains the same. If they determine during the forecast that the dirt level in the measuring chamber is so high that the alarm threshold can no longer be readjusted, the function test will be negative.