Sensitive material of MQ-2 gas sensor is SnO2, which with lower conductivity in clean air. When the target flammable gas exist, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ-2 gas sensor has high sensitivity to propane and smoke, also can detect the natural gas and other flammable steam well. It is with low cost and suitable for different applications of detecting kinds of flammable gases

• It has good sensitivity to propane, smoke &etc in wide range
• has advantages such as long lifespan
• low cost and simple drive circuit &etc.

Winsen Electronics, manufacture original and new methane gas sensor, nature gas sensor, LNG gas detection sensor with long lifespan and low price. Sensitive material of MQ-4 gas sensor is SnO2, which with lower conductivity in clean air. When the target flammable gas exist, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ-4 gas sensor has high sensitivity to methane, also has anti-interference to alcohol and other gases.

• Target Gas: Methane/CH4/ LNG
• Detection range: 300～10000ppm
• Application:Domestic gas leakage alarm, Nature Gas Detection Gas Sensor/ Semiconductor Gas Sensor.

Winsen Electronics, manufacture original and new LPG gas sensor, CH4 Sensor, and C3H8 Gas Sensor with long lifespan and low price for domestic gas leakage alarm. Sensitive material of MQ-5 gas sensor is SnO2, which with lower conductivity in clean air. When the target flammable gas exist, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ-5 gas sensor has high sensitivity to butane, propane, methane and can detect methane and propane at the same time. It also can detect kinds of flammable gases, especially LPG(propane).It is a kind of low–cost sensor for many applications.

• Detection Gas: Propane, Methane
• Detection Range: 300～10000ppm（CH4,C3H8）
• Application: domestic gas leakage alarm, portable gas detector

Winsen Electronics is original manufacturer of MQ-7B Carbon Monoxide gas sensor, CO Gas sensor, with 80% market share in gas sensor field. Sensitive material of MQ-7B gas sensor is SnO2, which with lower conductivity in clean air. It make detection by method of cycle high and low temperature, and detect CO at low temperature(heated by 1.5V).The sensor’s conductivity gets higher along with the CO gas concentration rising. At high temperature(heated by 5.0V),it cleans the other gases adsorbed at low temperature. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.

• Detection Gas: CO, carbon monoxide
• Detection Range: 10～500ppm CO
• Application: domestic CO gas leakage alarm

Winsen Electronics is original manufacturer of MQ-8 Hydrogen gas sensor, H2 gas sensor, with 80% market share in gas sensor field. Sensitive material of MQ-8 gas sensor is SnO2, which with lower conductivity in clean air. When hydrogen gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ-8 gas sensor has high sensitivity to hydrogen gas, also has anti-interference to other gases. This sensor can detect hydrogen, especially city gas. It is a kind of low-cost sensor for kinds of applications.

• Detection Gas: Hydrogen, H2 sensor
• Detection Range: 100～1000ppm(H2)
• Application: Domestic gas leakage alarm

Winsen Electronics, as a professional gas sensing solution provider with over 30 years gas sensor manufacture experience, offers semiconductor gas sensor for CO & Methane use. Sensitive material of MQ-9B gas sensor is SnO2, which with lower conductivity in clean air. It detects carbon monoxide (1.5V) by method of cycle high and low temperature. At high temperature (5.0V), it can detect CO as well as clean the other gases adsorbed at low temperature. The sensor’s conductivity gets higher along with the CO and CH4 gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.

• Detection Gas: Dual gas, Carbon Monoxide & Methane
• Detection Range: 10～500ppm CO,300～10000ppm CH4
• Application: domestic CO gas leakage alarm

Winsen Electronics, as a professional gas sensing solution provider with over 30 years gas sensor manufacture experience, offers Ozone O3 gas sensor. Sensitive material of MQ131 gas sensor is semiconductor metallic oxide, which with high conductivity in clean air. When the ozone gas exists, the sensor’s conductivity gets lower along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ131 ozone gas sensor has high sensitivity to ozone, and also has sensitivity to strong oxide such as Cl2, NO2 &etc. It responses oppositely to organic interference gases.

• Detection Gas: Ozone, O3
• Detection Range: 10～1000ppm Ozone
• Application: domestic ozone concentration alarm

Winsen Electronics, as a professional gas sensing solution provider with over 30 years gas sensor manufacture experience, offers Ozone O3 gas sensor. Sensitive material of MQ131 gas sensor is WO3, which with lower conductivity in clean air. When the ozone gas exists, the sensor’s conductivity gets lower along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ131 ozone gas sensor has high sensitivity to ozone, and also has sensitivity to strong oxide such as Cl2, NO2 &etc. It responses oppositely to organic interference gases.

• Detection Gas: Ozone, O3
• Detection Range: 10～1000ppb Ozone
• Application: domestic ozone concentration alarm

Winsen Electronics manufacture air quality sensor and VOC sensor MQ135 for IAQ monitor application. Sensitive material of MQ135 gas sensor is SnO2, which with lower conductivity in clean air. When target pollution gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ135 gas sensor has high sensitivity to ammonia gas, sulfide, benzene series steam, also can monitor smoke and other toxic gases well. It can detect kinds of toxic gases and is a kind of low-cost sensor for kinds of applications.

• Detection Gas: ammonia, sulfide, benzene series steam
• Detection Range: 10～1000ppm( ammonia gas, toluene, Hydrogen, smoke)
• Application: IAQ Monitor, Domestic gas alarm

Winsen Electronics produce semiconductor hydrogen sulfide sensor, H2S Gas sensor MQ136 for H2S gas alarm. Sensitive material of MQ136 gas sensor is SnO2, which with lower conductivity in clean air. When H2S gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ136 gas sensor has high sensitivity to H2S gas, also can monitor organic vapor including sulfur well. It a kind of low-cost sensor for kinds of applications.

• Detection Gas: Hydrogen Sulfide, H2S
• Detection Range: 1～200ppm H2S
• Application: H2S gas alarm

Winsen Electronics produce semiconductor ammonia sensor, NH3 Gas sensor MQ137 for NH3 gas alarm, industrial NH3 gas leakage alarm, portable NH3 gas detector. Sensitive material of MQ137 gas sensor is SnO2, which with lower conductivity in clean air. When NH3 gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ137 gas sensor has high sensitivity to NH3 gas, also can monitor organic amine such as trimethylamine, cholamine well. It can detect kinds of gases including ammonia and is a kind of low-cost sensor for kinds of applications.

• Detection Gas: Ammonia, NH3 Gas Sensor
• Detection Range: 5～500ppm NH3
• Application: NH3 gas alarm, NH3 gas leakage alarm, portable NH3 gas detector.

Winsen Electronics manufacture air quality sensor and VOC sensor MQ138 for IAQ monitor application. Sensitive material of MQ138 gas sensor is SnO2, which with lower conductivity in clean air. When VOC gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ138 gas sensor has high sensitivity to toluene, acetone,alcohol,methanol,also can monitor hydrogen and other organic vapour well. It can detect kinds of organic gases and is a kind of low-cost sensor for kinds of applications.

• Detection Gas: toluene, acetone, alcohol, hydrogen
• Detection Range: 5～500ppm VOC
• Application: domestic VOC gas alarm, VOC gas leakage alarm and portable VOC gas detector

Winsen Electronics manufacture mini size alcohol sensors for gift-type breathalyzer use. Sensitive material of MQ303B gas sensor is semiconductor material which is with lower conductivity in clean air. When the target alcohol gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.

• Detection Gas: Alcohol, C2H5OH
• Detection Range: 20~ 500ppm alcohol
• Application: gift-type breathalyzer, alcohol tester