In recent years, gas cylinders have been gradually replaced by pipeline natural gas. However, some rental houses, restaurants and other places still use gas cylinders on a large scale. Although gas cylinders are flexible, convenient and inexpensive, they pose considerable safety risks. Gas fuel is easy to use and ignites quickly, but improper installation or usage can lead to explosions, fires and poisoning accidents. Firefighters remind that precautions must be taken in gas usage, as any minor negligence may trigger accidents resulting in property destruction and casualties.
At around 11:00 a.m. on October 13th, a gas explosion occurred at a snack bar on Xinyang Road, Ehu Town, Xishan District, Wuxi City. Preliminary judgment indicated the accident was suspected to be caused by gas leakage. As of 17:00 that day, the accident had caused 9 deaths and 10 injuries. The incident immediately became a hot news topic and aroused public concern about the safety of kitchen gas in their daily lives
In the early stage of a fire, carbon monoxide is produced. Inhalation of carbon monoxide first causes symptoms such as dizziness and blurred vision, and in severe cases, even syncope. Once entering the human body, carbon monoxide binds to hemoglobin in the blood, preventing hemoglobin from combining with oxygen. This leads to hypoxia in body tissues and ultimately death by suffocation. Therefore, the application of carbon monoxide sensors in fire alarms is crucial: they transmit real-time carbon monoxide concentration data in buildings to fire control centers to guide fire rescue operations.
Shenzhen Wuliang Sensor Technology Co., Ltd. specializes in the UK-imported DDS electrochemical carbon monoxide sensor with high hydrogen resistance, model GS+4CO₂H. This sensor is designed to measure carbon monoxide in environments with high hydrogen content and is widely used in steel plants, chemical industries, civil applications and other fields. The carbon monoxide sensor can detect low concentrations of carbon monoxide, while photoelectric sensors detect visible smoke particles. By analyzing the data ratio and correlation from these two sensors and applying specific fire detection algorithms, the sensitivity of fire detection can be significantly improved.
Features
Measuring range: 0–1000 ppm
Overload resistance: 0–2000 ppm
Cross-sensitivity to hydrogen: < 20%
Cross-sensitivity to alcohol: < 0.25%
High stability
Strong environmental adaptability
Detection Principle
When gas leaks into the environment and the detected gas concentration reaches the critical threshold set for explosion or poisoning alarms, the gas alarm converts gas signals into voltage or current signals and transmits them to the alarm instrument, which then triggers an alarm. The carbon monoxide sensor detects low-concentration combustible gases in the surrounding environment and sends detection signals (analog or digital) to the controller or control circuit. When the combustible gas concentration exceeds the preset value, the controller activates an alarm or triggers actuators to shut off gas valves and other protective actions. On-duty personnel can then take timely measures to prevent gas explosion accidents.
Carbon monoxide is an invisible, colorless, odorless and non-irritating gas that cannot be perceived by human senses. This makes the predictive alarm function of carbon monoxide sensors particularly important. In the United States, the Consumer Product Safety Commission (CPSC) recommends that every household should be equipped with at least one carbon monoxide alarm, which is an essential part of household safety plans.
