When designing and manufacturing household gas alarms, sensors used to detect combustible gases need to meet a series of technical and safety requirements that ensure that the sensors can work stably and long-term in a home environment and respond quickly and accurately when a gas leak occurs.

    The sensors used in household gas alarms usually need to meet the following key requirements: 

    1. High sensitivity and selectivity 

    The gas sensor must have high sensitivity to target gases (such as methane, liquefied petroleum gas, etc.) and can respond quickly at low concentrations to ensure that the alarm can be triggered at the early stage of a gas leak. At the same time, the sensor needs to have a certain degree of selectivity to reduce false alarms for other non-target gases, such as excluding possible interference sources such as water vapor and alcohol generated during cooking. 

    2. Wide range and good linearity 

    The sensor should be able to work normally over a wide range of gas concentrations, from near zero concentration to dangerous concentrations, and there should be a good linear relationship between the output signal and the gas concentration. 

    3. Stability and reliability 

   The sensor should work stably for a long time, and the performance of the sensor will not be significantly attenuated due to changes in environmental conditions (such as temperature, humidity, and pressure fluctuations), ensuring performance consistency during the service life. 

    4. Strong anti-poisoning ability 

    Even in the case of long-term exposure to gas or pollutants, it can still maintain normal working conditions. 

    5. Quick response and recovery With quick response time, once the gas concentration rises, the sensor can quickly detect the change and output an alarm signal. After detecting a gas leak, when the gas concentration drops to a safe level, the sensor should be able to quickly return to normal to avoid continuous false alarms. 

    6. Certification and compliance 

    Household gas alarms and the sensors they use should comply with relevant regulations and standards of various countries and regions, such as the national standard GB/T 34004-2017/GB 15322.2-2019.

    With the advancement of technology, household gas safety precautions are also constantly upgrading. Today, laser methane sensors are quietly changing our understanding of gas leak monitoring with their excellent performance and unparalleled advantages, and building an invisible safety barrier for thousands of families.

TX911-A Laser Methane Gas Sensor

    Laser methane sensors use advanced laser absorption spectroscopy technology to accurately detect trace methane gas concentrations in the environment in a non-contact manner. Compared with traditional sensors, it has higher sensitivity and accuracy, can detect tiny gas leaks at a very early stage, and effectively prevent potential explosions and fires and other dangerous situations.

    Under normal pressure conditions, laser sensors are not affected by changes in pressure and humidity, so there is no poisoning and no need for adjustment, which greatly reduces the false alarm rate and makes the household gas environment safer and more reliable. At the same time, because of the high monochromaticity of the laser, an isolated absorption spectrum of the gas molecule to be measured can be used for measurement, avoiding the cross-interference of different molecular spectra, and the laser methane sensor has unique selectivity for methane. In addition, the laser methane sensor uses near-infrared laser technology, which also has many advantages such as high precision, anti-interference, and anti-water vapor.

    With the technical independence of lasers and detectors, laser methane sensors have ushered in a comprehensive domestic substitution, which not only breaks through the "stuck neck" technology, but also has no inferior performance.

    The application of laser methane sensors has brought household gas safety to a new height. It silently protects every warm family with the power of cutting-edge technology. In the future, we look forward to more such high-tech products entering thousands of households to build a safe and livable home.