Home Combustible Gas Alarm
The combustible gas alarm is an alarm device for detecting gas leakage. The component that reacts to the combustible gas is a gas sensor, and the response signal is converted into an electrical signal through the circuit board. When the combustible gas in the air reaches a certain concentration value, the alarm will alarm. The high-end household combustible gas alarm can automatically start the exhaust equipment and close the gas pipeline valve at the same time. A wireless transmission device can be installed inside the gas alarm to realize overall monitoring and network alarm to ensure the safety of everyone's life and property.
There are two hazards of gas leakage: one is leakage, combustion and explosion, and the other is personnel inhalation poisoning; among the two hazards,the prevention of combustion and explosion is the top priority.
Health is as important as safety
Traditional home combustible gas alarms only sound on-site when there is a serious gas leakage, but in fact, or carbon monoxide concentrations exceeding the standard caused by gas leakage or incomplete combustion often occur.Although this situation does not cause the same danger as an explosion, it can seriously endanger our health over many years.
▲ME2-CO CO Sensor
Winsen ME2-CO electrochemical sensor can accurately analyze the concentration of colorless and odorless combustible gas and carbon monoxide. When the gas concentration is abnormal, the sensor will immediately give a response signal,
which greatly improves the user's vigilance and prevents problems before they occur. Carbon monoxide is a colorless, odorless, non-irritating gas that cannot be sensed by human. The maximum concentration that a healthy adult can bear within eight hours is 50ppm. When the concentration is 800ppm, dizziness, nausea, and spasm within 45 minutes, loss of consciousness within 2 hours, death within 2-3 hours. Winsen electrochemical sensor detects the concentration of carbon monoxide between 0-1000ppm, and the maximum measurement limit can reach 2000ppm. It can effectively and timely feedback concentration data, prevent carbon monoxide poisoning, and protect health and safety.
The combustible gas sources in people's lives are roughly divided into: liquefied gas (LPG),natural gas,coal gas (LPG) and other alkane combustible gases, etc.
The current gas detection methods for the combustible gas industry are:
Home combustible gas is mainly detected by semiconductor and planar semiconductor components. At present, domestic products occupy the mainstream market, mainly measuring 0-10000ppm. Municipal gas companies mainly use catalytic components, mainly measuring 100% LEL. Mainly used for gas storage, transportation, pipeline safety inspection and other places. After 2007, high-end gas detection products in the gas industry have gradually adopted infrared gas sensors, which can measure 100% LEL and 100% VOL.At the same time, the laser beam technology is used in the gas industry, especially in the long-distance inspection.
Liquefied Petroleum Gas (LPG)
▲ MQ-5 propane sensor
The main components are ethylene, ethane, propylene, propane and butane, etc., which are liquid in the gas cylinder. Once they flow out, they will vaporize into a flammable gas that is about 250 times the original volume. It is easy to spread and will burn or explode when encountering flame. If this kind of liquefied gas is used, it is necessary to select an alarm equipped with a propane sensor in a targeted manner.
Natural gas is an important energy source and is widely used as city gas and industrial fuel.
▲MP-4 methane sensor for
Natural gas is one of the safer gas. It does not contain carbon monoxide and is lighter than air. Once it leaks, it will spread upward immediately, and it is not easy to accumulate to form an explosive gas, so it is safer. The main component of natural gas is methane, which is generally transported by pipelines. Therefore, for safety, most cities now use natural gas for supply. When using natural gas, it is necessary to select an alarm equipped with a methane sensor detection module.
Although artificial coal gas (coking gas) is currently used less, it is still used in some areas.It is necessary to select a hydrogen sensor if use coal gas.
Coal gas is made by dry distillation or vaporization of solid raw materials such as coal or coke, and its main components are carbon monoxide, methane and hydrogen. The working pressure of coal-made gas is 1.0KPa, and the gas supply method is generally pipeline.
▲ MQ-8 sensor for
Winsen Technology is suitable for the detection of combustible gas such as liquefied gas, natural gas,coal gas, etc. After years of development, gas sensor technology has become very mature. Sensors and modules such as MP series planar semiconductor gas sensors, MC100 series carrier catalytic gas sensors, and MQ series semiconductor gas sensors are widely used in household gas leak detection.
Attached table: sensor selection of gas detection in combustible gas industry
|Model||Test object||Measurement range||Picture|
|semiconductor sensor||MQ series（MQ-2、MQ-4、MQ-5、MQ-6 etc.）||Various combustible gases||300-1000ppm|
|Planar Gas Sensor||MP series（MP-4、MP-5）||Various combustible gases||300-10000ppm|
|Catalytic gas sensor||MC series（MC101、MC102、MC105etc.)||Various combustible gases||0-100%LEL|
|Catalytic gas sensor||MC series（MC112、MC113、MC114）||Various combustible gases||0-100%LEL|
|Thermally Conductive Gas Sensors||MD series（MD61）||Various combustible gases||0-100%VOL|
|Infrared Gas Sensor||MH4 series（MH-440D）||Various combustible gases||0-100%VOL
|Infrared Gas Sensor||MH7 series（MH-741）||Various combustible gases||0-100%VOL
ZE12A is a general-purpose and high-performance electrochemical module. It can detect the CO, SO2, NO2, O3 based on electrochemical principle, it has good selectivity and stability. A temperature sensor is built-in for temperature compensation. It has the digital output and analog voltage output at the same time which facilities the usage and calibration and shorten the development period. It is a combination of mature electrochemical detection principle and sophisticated circuit design, to meet customers’ different detection needs.
ZP01-MP503 air-quality module adopts flat surface semiconductor gas sensor. The module has very high sensitivity to volatile organic gases such as formaldehyde, benzene, carbon monoxide, ammonia, hydrogen, alcohol and smoke of cigarette, essence &etc. The module has been aging, debugged, adjusted and calibrated. So it has good consistency and high sensitivity.
ZP16 air-quality module adopts flat surface semiconductor gas sensor. The module has good sensitivity to volatile organic gases such as formaldehyde, benzene, carbon monoxide, ammonia, hydrogen, alcohol and smoke of cigarette, essence &etc. The module has been aging, debugged, adjusted and calibrated. So it has good consistency and high sensitivity.
The MH-Z19D carbon dioxide gas sensor uses the principle of non-dispersive infrared (NDIR) to detect the presence of CO2 in the air, and has two types of pins and terminals. It is a high-performance sensor produced by combining mature infrared absorption gas detection technology with precise optical path design and sophisticated circuit design.
MH-Z19C NDIR infrared gas module is a common type, small size sensor, pins type or terminal type, using non-dispersive infrared (NDIR) principle to detect the existence of CO2 in the air, with good selectivity, non-oxygen dependent and long life. Built-in temperature compensation; and it has UART output and PWM output. It is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design and superior circuit design.
MH-Z19E NDIR infrared gas module is a common type, small size sensor, pins type or terminal type, using non-dispersive infrared (NDIR) principle to detect the existence of CO2 in the air, with good selectivity, non-oxygen dependent and long life. Built-in temperature compensation; and it has UART output and PWM output. It is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design and superior circuit design.
ZE08K-CH2O electrochemical chemical formaldehyde module is a universal, small Module. The use of electrochemical principles to detect CH2O in the air, which has good selectivity and stability. At the same time, it has digital output and analog voltage output for easy use. ZE08K-CH2O is a universal gas module designed to design mature electrochemical detection technology with excellent circuit design.
ZS05 temperature and humidity module is a digital signal output temperature and humidity sensor module. It uses dedicated digital module acquisition technology to ensure high reliability and stability. ZS05 adopts standard IIC communication mode, which can be directly connected to IIC communication bus, easy to use
MEMS combustible gas sensor is using MEMS micro-fabrication hot plate on a Si substrate base, gas-sensitive materials used in the clean air with low conductivity metal oxide semiconductor material. When the sensor exposed to gas atmosphere, the conductivity is changing as the detected gas concentration in the air. The higher the concentration of the gas, the higher the conductivity. Use simple circuit can convert the change of conductivity of the gas concentration corresponding to the output signal.
MEMS combustible gas sensor is using MEMS micro-fabrication hot plate on a Si substrate base, gas-sensitive materials used in the clean air with low conductivity metal oxide semiconductor material. When the sensor exposed to gas atmosphere, the conductivity is changing as the detected gas concentration in the air. The higher the concentration of the gas, the higher the conductivity. The sensor has high sensitivity and small size, and adopts I2C digital signal output mode to facilitate the observation of multiple sensor networks. It also pre-sets a pin for alarm trigger signal output, which can be widely used in many fields such as environmental safety and portable instruments.
How to choose the right sensor for your project?
We have 17 sensor series, 200+ categories, and 300+ detection objects for gas detection. Such as CO, CO2, VOC, PM2.5, CH4, LPG and so on. In particular, we also have MEMS sensors. According to your industry application, gas principle, power consumption, accuracy, and range requirements, and we can select a specific model for you. You can also use the product filter below to choose a suitable product, or choose online serivce.
The first six FAQs. Use the search bar above to reveal more!
What is the Difference Between Semiconductor Sensors and Electrochemical Sensors?
What Are the Precautions for Manual Soldering of Semiconductor Sensors?
Can Wave Soldering Be Used for Semiconductor Sensors?