描述
可用於檢測氣體洩漏（在家庭和工業中）。它可以檢測液化石油氣，異丁烷，甲烷，酒精，氫氣，somke等。根據其快速響應時間，可以盡快進行測量。靈敏度也可以通過電位器進行調整。
注意事項：Grove – Gas Sensor (MQ3) 氣體感測器模組所量測到的值只反映在允許的誤差範圍內近似的氣體濃度趨勢，但並不代表確切的氣體濃度。空氣中某些組分的檢測通常需要更精確和更昂貴的儀器，這不能用單個氣體傳感器來完成。如果您的項目旨在獲得非常精確的氣體濃度，那麼我們不建議使用這種氣體傳感器。
特色：
- 對酒精敏感度高，對汽油敏感度小
- 穩定和長壽
- 響應速度快，靈敏度高
Specification
| Item | Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|---|
| VCC | Working Voltage | 4.9 | 5 | 5.1 | V |
| PH | Heating consumption | 0.5 | – | 750 | mW |
| RL | Load resistance | adjustable | |||
| RH | Heater resistance | – | 33 | – | Ω |
| Rs | Sensing Resistance | 1 | – | 8 | MΩ |
| Scope | Detecting Concentration | 0.05 | – | 10 | mg/L |
Schematic
Datasheet
The Grove – Gas Sensor module is useful for gas leakage detecting(in home and industry). It can detect LPG, i-butane, methane, alcohol, Hydrogen, somke and so on. Measurements can be taken as soon as possible based on its fast response time. Also the sensitivity can be adjusted by the potentiometer.There are different gas detectors for sale, like MQ2, MQ3,MQ5 and MQ9. Below is a contrast table of them.
| Sysmbol | MQ-2 | MQ-3 | MQ-5 | MQ-9 |
| Detect Gas | Combustible Gas、Smoke | Alcohol Vapor | LPG, Natural Gas, Town Gas | Carbon Monoxide, Coal Gas, Liquefied Gas |
| Detect Concentration | 300-10000ppm | 0.04-4mg/L Alcohol | 300-10000ppm | 10-1000ppmCO;100-10000PPm Gas |
Features
- High sensitivity to Combustible gas in wide range
- Stable performance, long life, low cost
- Fast response
- Wide detection range
- Simple drive circuit
Technical Details
| Dimensions | 130mm x 90mm x 21mm |
| Weight | G.W 9g |
| Battery | Exclude |
