3 85 LPG LNG CO LPG LNG CO Gas alarm detector of sound-pressur level of at least 85 decibels at 10 feet3.0M and set which uses the Semi-condector sensor

摘要

This alarm uses a semiconductor gas sensor to detect the gas concentration in case of gas leakage and compares it with the standard value of the proper gas concentration input through calibration, and it is an alarm corresponding to the abnormal condition calculated by the program inside the microcomputer. Generate a signal. The generated alarm signal drives the buzzer to generate an alarm sound of more than 85 decibels and indicates an alarm red signal. ; As a result, it is a device that detects gas concentration within the minimum explosive limit value range in case of a gas leak, and alarms and performs protection (prevention) function from human injury and disaster. ; The electrochemical gas sensor used in Korea has the advantage that the output voltage increases linearly in proportion to the gas concentration, so that it is not affected by miscellaneous gases, which are incombustible gases, but it is difficult to detect gases affected by humidity and too high concentrations. In addition, since harmful gases deteriorate the catalyst of the sensor, the sensitivity becomes dull and gradually does not function, which has a short life. ; Tests are conducted in a manner consistent with US Underwriters Laboratories (UL) regulations to maintain safety, robustness and long life and reliability in use. ; Semiconductor Gas Sensor, Electrochemical Gas Sensor, Decibel, Lowest Explosion Limit, UL