Specification :

These sensors can detect the heat of fire without burning directly. Inside the sensor there will bimetal strip when the sensor is in contact ering significant temperature changes ( usually changes in temperature between 6, 7-8, 3 degrees Celsius / min) . When the temperature is back to normal this bimetallic will return to normal. But if the sensor is exposed to direct flame and the ignition off so of course can not be used anymore. To try to use a regular blow dryer, blowing hot air from a hair dryer enough to download - ' trigger' ROR without destroying it.