Specific Introduction to the Skills of Ionic Infrared Thermometer
The infrared thermometer has an ionization chamber, which uses an artificial radioactive element - americium 241 (Am241), with an intensity of about microcuries. It is normally in equilibrium with an electric field. When smoke enters the ionization chamber, the positive and negative ions ionize, disturbing the normal movement of charged particles. Under the effect of the electric field, each of them moves towards the positive and negative electrodes, disrupting the balance and current between the ionization chambers, The voltage will change. The ion infrared thermometer is a device that senses the micro current changes of smoke particles through a voltage change caused by an ionization chamber equivalent to a smoke sensitive resistor. Then the microscopic manifestation is that the addition of equivalent resistance in the ionization chamber leads to an increase in voltage at both ends of the chamber, thereby determining the smoke situation in the air.
The ion type infrared thermometer uses trace amounts of artificial radioactive substance americium 241 internally. Because the thermometer body is covered by a metal shell, radiation will never leak, and users can use it with confidence. In addition, its radiation energy only uses 55% of NIS-09C, so countries with restrictions on the use of radiation energy can also use it with confidence. Moreover, the foot equipment and output characteristics of this thermometer are interchangeable with products from other companies. After selecting a low radiation energy source and appropriately expanding the ionization chamber, the balanced voltage becomes more stable during cleaning of moisture, greatly reducing the false alarm rate. Ionic infrared thermometer is an advanced and reliable thermometer, widely used in various fire alarm systems, with functions far superior to gas sensitive resistor type fire alarms.
Comparison between photoelectric smoke alarm and ion infrared thermometer:
There is an optical maze inside the photoelectric smoke alarm, which is equipped with an infrared tube. When there is no smoke, the infrared receiving tube cannot receive the infrared light announced by the infrared transmitting tube. When smoke enters the optical maze, it refracts and reflects, and the receiving tube receives the infrared light. The intelligent alarm circuit determines whether the threshold has been exceeded, and if it has exceeded, an alarm will be announced. The ion smoke alarm should have a more active sensing of small smoke particles and can respond evenly to various types of smoke; However, the forward facing photoelectric smoke alarm has a more active sensing of slightly larger smoke particles, and a poorer response to gray and black smoke. When a raging fire occurs, there are more small particles of smoke in the air, while during smoldering hours, there are more larger smoke particles in the air. If a fire breaks out and there are many small particles of smoke, the ion smoke alarm will alarm first than the photoelectric smoke alarm. These two types of smoke alarms are not closely spaced at all times, but the extension of such fires is extremely fast. It is recommended to install ion smoke alarms in such places. After another type of smoldering fire occurs, many slightly larger smoke particles are emitted, and the photoelectric smoke alarm will alarm first than the ion smoke alarm. This type of place advocates the installation of photoelectric smoke alarm. If you want to combine the benefits of both, you can install both types of smoke alarms in the area where smoke alarms are needed.
