Product Introduction
The gas sensing material used in MQ-9 gas sensors is tin dioxide (SnO2) with low conductivity in clean air. We use a high-low temperature cycle detection method to detect carbon monoxide at low temperatures (1.5V heating). The conductivity of the sensor increases with the concentration of carbon monoxide gas in the air. At high temperatures (5.0V heating), we detect combustible gases such as methane and propane and clean the stray gases adsorbed at low temperatures. The change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit. The MQ-9 gas sensor has high sensitivity to carbon monoxide, methane, and liquefied gas. This sensor can detect various gases containing carbon monoxide and flammability, making it a low-cost sensor suitable for multiple applications.
Product Parameter
| 產(chǎn)品型號(hào) Product model | MQ-9 | ||
| 產(chǎn)品類型 Product type | 半導(dǎo)體氣敏元件 Semiconductor gas sensing components | ||
| 標(biāo)準(zhǔn)封裝 Standard packaging | 膠木 Rubberwood | ||
| 檢測(cè)氣體 Gas detection | 一氧化碳、可燃?xì)怏w CO、combustible gases | ||
| 檢測(cè)濃度 Detect concentration | 10-1000ppmC0; 100-10000ppm燃?xì)猓╣as） | ||
| 標(biāo)準(zhǔn)電路條件 Standard circuit conditions | 回路電壓 Circuit voltage | Vc | ≤10V DC |
| 加熱電壓 Heating voltage | VH | 5.0V±0.2V ACorDC(high) | |
| 1.5V士0.1V ACorDC(low) | |||
| 加熱時(shí)間 Heating time | TL | 60士1S(high) 90士1S(low) | |
| 負(fù)載電阻 Load resistance | RL | Adjustable | |
| 標(biāo)準(zhǔn)測(cè)試條件下元件特性 Component characteristics under standard testing conditions | 加熱電阻 Heating resistor | RH | 31Ω±3Ω（room temperature） |
| 加熱功耗 Heating power consumption | PH | About 350mW | |
| 敏感體表面電阻 Surface resistance of sensitive body | RS | 2K Ω -20K Ω (in100ppmC0) | |
| 靈敏度 Sensitivity | S | Rs (in air)/Rs(100ppmC0)≥5 | |
| 濃度斜率 Concentration slope | ɑ | ≤0.6(R300ppm/R100ppmCO) | |
| 標(biāo)準(zhǔn)測(cè)試條件 | 溫度、濕度 Temperature and humidity | 20℃士2℃;65%士5%RH | |
| 標(biāo)準(zhǔn)測(cè)試電路 Standard Test Circuit | Vc:5.0V±0.1V VH（high）：5.0V±0.1V VH（low）：1.5V±0.1V | ||
| 預(yù)熱時(shí)間 Preheating time | Not less than 48 hours | ||
Product Photograph
Payment&Transportation
Official Certificate&Certificate
Multiple product supply
Company office environment
Warehouse Real Shot
Standard packaging
We also provide ：
| Part No | Manufacturer | Date Code | Quantity | Description |
| LM22676ADJ | NS | 19+ | 250 | SOP8 |
| TPS562201DDCR | TI | 22+ | 795500 | SOT23-6 |
| NJG1806K75 | JRC | 22+ | 500000 | DFN6 |
| TLV74318PDQNR | TI | 22+ | 402000 | X2SON-4 |
| NJG1801K75 | JRC | 22+ | 300000 | SMD |
| NJG1804K64 | JRC | 22+ | 300000 | DFN8 |
| LM27761DSGR | TI | 22+ | 151000 | WSON8 |
| TLV62565DBVR | TI | 22+ | 138000 | SOT23-5 |
| TPS613222ADBVR | TI | 22+ | 108000 | SOT23-5 |
| LNK625DG-TL | POWER | 22+ | 100000 | SOP-8 |
| OPA4322AIPWR | TI | 22+ | 100000 | TSSOP14 |
| TLV75528PDRVR | TI | 22+ | 99000 | WSON-6 |
| TPS7A2025PDQNR | TI | 22+ | 78500 | X2SON-4 |
| TLV62568DBVR | TI | 22+ | 72000 | SOT23-5 |
| STM32L051K8U6TR | ST | 22+ | 60000 | QFN32 |
| SKY66421-11 | SKYWORKS | 22+ | 56500 | QFN16 |
| TPS7A1111PDRVR | TI | 22+ | 54000 | WSON6 |
| TLV62569PDDCR | TI | 22+ | 52000 | SOT23-6 |
| TLV62569DBVR | TI | 22+ | 48000 | SOT23-5 |
| TPS23753APWR | TI | 22+ | 40000 | TSSOP14 |
| NB691GG-Z | MPS | 22+ | 30000 | QFN |
| SN74AHC1G02DBVR | TI | 22+ | 27939 | SOT-23 |
| TPS63000DRCR | TI | 22+ | 23238 | VSON10 |
| TLV75533PDRVR | TI | 22+ | 21500 | WSON6 |
| NB687BGQ-Z | MPS | 22+ | 20000 | QFN |
| A3916GESTR-T-1 | ALLEGRO | 22+ | 17150 | QFN-20 |
| TPS62135RGXR | TI | 22+ | 15000 | VQFN11 |
| TLE2022AMDR | TI | 0803+ | 12500 | SOP8 |
| TPS23756PWPR | TI | 22+ | 12000 | HTSSOP-20 |
