Specific introduction of ion infrared thermometer skills
The infrared thermometer has an ionization chamber. The artificial radioactive element used in the ionization chamber - americium 241 (Am241), the intensity is about microcuries. Under normal circumstances, it is in the balance of the electric field. When smoke and dust enter the ionization chamber, the positive ionization occurs. , Negative ions interfere with the normal movement of charged particles, and move to the positive and negative electrodes respectively under the effect of the electric field, destroying the balance between the inner and outer ionization chambers, and the current and voltage will change. The ion infrared thermometer is a micro-current change device that senses smoke particles through a voltage change caused by an ionization chamber equivalent to a smoke sensitive resistor. Then microscopically, the equivalent resistance increase of the ionization chamber causes the voltage at both ends of the ionization chamber to increase, thereby determining the smog in the air.
MTi-15 ion infrared thermometer uses a small amount of artificial radioactive substance americium 241 inside. Because the body of the thermometer is covered by a metal shell, the radiation will never leak, and users can use it with confidence. In addition, its radioactivity uses only 55% of NIS-09C, so countries that have restrictions on the use of radioactivity can use it with confidence. In addition, the foot equipment and output characteristics of this thermometer are compatible with other companies' products. After the MTi-15 source chip adopts low radiation energy and properly expands the ionization chamber, the balance voltage becomes more stable in the cleaning moisture, which greatly reduces the false alarm rate. MTi-15 ion infrared thermometer is a kind of advanced technology, stable and reliable thermometer, which is widely used in various fire alarm systems, and its performance is far superior to that of gas sensitive resistor fire alarms.
Comparison of photoelectric smoke alarm and ion infrared thermometer:
There is an optical maze in the photoelectric smoke alarm, and the device has an infrared pair tube. When there is no smoke, the infrared receiving tube cannot receive the infrared light emitted by the infrared emitting tube. When the smoke enters the optical maze, the receiving tube receives the infrared light after refraction and reflection. Light, the intelligent alarm circuit judges whether the threshold is exceeded, and if it exceeds, an alarm is issued. Ionic smoke alarms are more sensitive to small smoke particles and respond to all kinds of smoke in a balanced manner; while forward photoelectric smoke alarms are more sensitive to larger smoke particles and have poor response to gray smoke and black smoke. some. When a raging fire occurs, there are more fine particles of smoke in the air, and when smoldering, there will be more larger smoke particles in the air. If a large amount of fine particles of smoke are generated after a fire breaks out, the ion smoke alarm will alarm before the photoelectric smoke alarm. The time interval between these two kinds of smoke alarms is not large, but this kind of fire spreads extremely fast. It is better to install ion smoke alarms in such places. After another type of smoldering fire occurs, a large number of slightly larger smoke particles are generated, and the photoelectric smoke alarm will alarm before the ion smoke alarm. It is recommended to install a photoelectric smoke alarm in such places. If you want to have the best of both worlds, you can install both types of smoke alarms where smoke alarms are required.
Comparison of gas sensitive infrared thermometer and ion infrared thermometer:
Fire smoke is a mixture of gas, liquid, and solid particles, with physical characteristics such as volume, mass, temperature, and charge. The ion-type infrared thermometer is through the outer ionization chamber with smoke escaping. The normal movement of charged particles is disturbed, and the smoke condition in the air is judged by the change of current and voltage. The gas-sensitive thermometer is to detect the composition of certain combustible gases in the air, so in terms of fire detection, the function of the gas-sensitive thermometer is not as good as that of the ion thermometer. The gas sensitive thermometer is used to detect the content of combustible gas in the air, and can effectively detect the trace leakage of gas, liquefied petroleum gas, natural gas, carbon monoxide and other combustible gases. It is more suitable for petroleum, chemical, coal, electric power, Industrial enterprises such as metallurgy and electronics, as well as places where flammable gases are produced and stored, such as gas plants, liquefied petroleum gas stations, and hydrogen stations.
