Combustible gas alarm gas alarm toxic gas alarm gas leak alarm has generally enter households with gas, liquefied petroleum gas, natural gas and other combustible gases, these gases during use in the event of leakage, will cause poisoning, fire explosion, serious harm to people's lives and property safety. Combustible gas as an important gas detectors can timely and reliably detect the content of certain gases in the air and take timely and effective measures to remedy the correct treatment and disposal methods, reducing leakage caused by the accident is to avoid major The necessary condition of the property and casualty. Currently on the market, there are plenty of brands can be combustible gas users in selection need to consider what factors? The following technical indicators and technical parameters for the brief reference to your reference before choosing aspects: 1, response time (1) Response time: refers combustible gas alarm is triggered, the system displays the time interval of the tracer gas. It is the metric of the most basic indicator of the alarm system function. An alarm must have the capability to detect, timely detection results with appropriate display. (2) The combustible gas alarm response: the scene from the combustible gas alarm alarm to the control center to display the time interval of the alarm status. It includes the alarm delay, the establishment of the communication time and the control system equipment (typically acoustic, optical display) delay. (3) The combustible gas alarm confirm the time: the scene from the alarm sensor to the control center to confirm the alarm for a real time interval. It includes the time of the alarm response and review process, such as on-site monitoring, remote receiver time. This process can also be sent to the higher alarm center includes a control system, the alarm and the amount of information used by the communication time. Further, the start time of the coupling means can also be seen as a response time. As scene from the detector alarm the interval control linkage device (such as closing the solenoid valve to cut off the gas source, and turn on the exhaust fan, etc.). Usually alarm response is very short. Therefore, in the specific testing, in order to measure the alarm acknowledgment time or system response is appropriate. 2, the detection zone and the detection sensitivity of security systems are usually the detection area and detection sensitivity evaluation as a combustible gas alarm detection, which is that it is different from the PPS at. (1) detecting areas: a certain range of the security system design, when the gas reaches the alarm concentration in this range, the detector timely detection of an alarm signal. (2) Detection sensitivity: sensing capabilities of the detector at the installation site of a gas leak, usually different alarm concentration of the different gases explosion lower limit of 25% or less. Combustible gas alarm using semiconductor ambient temperature sensor, compared with previous contact with combustion sensor, it is the most prominent feature is no heating, so the element has the advantages of high sensitivity, fast response, low power consumption, long life, application broader prospects. The above two should be combined to do the actual detection. Detection can be lighter deflated test method to test whether the combustible gas alarm gas leak monitoring to achieve the test many times. 3, the detector the installation environment to ensure reliable detector can work its installation environment must have certain requirements, the installation must adopt appropriate methods to evade and eliminate environmental interference factors. (1) non-interference to avoid installation in the wet at the, or fumes Dragon dust concentrated spray paint, alcohol and other volatile chemicals, in order to avoid false positives. (2) the use of wall-mounted installation. The installation should be preceded by determining the proportion of combustible gas and air, combustible gas alarm installed in the appropriate location within a radius of 1.5 m from the gas source. The lighter than air gas, installed in the distance at the ceiling 30cm; gas that is heavier than air, mounted in the distance to the floor at 30cm. Family buildings internal space height is 2.6 meters. Artificial gas - lighter than air, floating aloft; natural gas - lighter than air, floating aloft; LPG - heavier than air and accumulate in low. ----- Jinan Chuanghui Electronics Technology Company http://www.qttcy.com.cn concerned about the health concerns fire safety