# MQSensorsLib This is a unified library to use sensors MQ: 2, 3, 4, 5, 6, 7, 8, 9, and 135. ## Getting Started ``` MQsensorLib Sensor1(MQ4); ppmMethano = Sensor1.readPPM(); ``` ### Prerequisites You'll need Arduino desftop app 1.8.9 or later. ### Sensor manufacter: | Sensor | Manufacter | URL Datasheet | |----------|----------|----------| | MQ-2 | Pololulu| [datasheet](https://www.pololu.com/file/0J309/MQ2.pdf) | | MQ-3 | Sparkfun | [datasheet](https://www.sparkfun.com/datasheets/Sensors/MQ-3.pdf) | | MQ-4 | Sparkfun | [datasheet](https://www.sparkfun.com/datasheets/Sensors/Biometric/MQ-4.pdf) | | MQ-5 | parallax | [datasheet](https://www.parallax.com/sites/default/files/downloads/605-00009-MQ-5-Datasheet.pdf) | | MQ-6 | Sparkfun | [datasheet](https://www.sparkfun.com/datasheets/Sensors/Biometric/MQ-6.pdf) | | MQ-7 | Sparkfun | [datasheet](https://www.sparkfun.com/datasheets/Sensors/Biometric/MQ-7.pdf) | | MQ-8 | Sparkfun | [datasheet](https://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Biometric/MQ-8.pdf) | | MQ-9 | Haoyuelectronics | [datasheet](http://www.haoyuelectronics.com/Attachment/MQ-9/MQ9.pdf) | | MQ-131 | Sensorsportal | [datasheet](http://www.sensorsportal.com/DOWNLOADS/MQ131.pdf) | | MQ-135 | HANWEI Electronics | [datasheet](https://www.electronicoscaldas.com/datasheet/MQ-135_Hanwei.pdf) | | MQ-303A | HANWEI Electronics | [datasheet](http://www.kosmodrom.com.ua/pdf/MQ303A.pdf) | | MQ-309A | HANWEI Electronics | [datasheet](http://www.sensorica.ru/pdf/MQ-309A.pdf) | ### Info of datasheets (Lineal analisis of Logarithmic rects
Sensor | H2 | LPG | CH4 | CO | Alcohol | Propane | Benzine | Hexane | Smoke | Nox | CL2 | O3 | CO2 | Tolueno | NH4 | Acetona | Iso-butano | Hydrogeno | Ethanol | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | m | b | |
-MQ-2 Pololulu | -2.2459 | 2.9845 | -2.2879 | 2.7901 | -2.6208 | 3.6075 | -3.1157 | 4.5134 | -2.7028 | 3.5595 | -2.2879 | 2.7901 | ||||||||||||||||||||||||||
-MQ-3 Sparkfun | -3.1851 | 4.7048 | -17.531 | 28.785 | -4.339 | 6.4432 | -1.435 | 0.4103 | -2.7009 | 0.632 | -2.7268 | 3.6299 | ||||||||||||||||||||||||||
-MQ-4 Sparkfun | -2.5818 | 3.6303 | 0.9873 | 2.6386 | -5.5945 | 5.6693 | -11.89 | 9.0375 | -11.189 | 9.0375 | ||||||||||||||||||||||||||||
-MQ-5 Sparkfun | -4.368 | 2.9667 | -2.5723 | 1.8943 | -2.4438 | 2.3044 | -4.8188 | 5.2023 | -4.419 | 4.8044 | ||||||||||||||||||||||||||||
-MQ-6 Sparkfun | -3.6775 | 5.0286 | -1.6567 | 2.8775 | -1 | 3.301 | -12.791 | 14.523 | -5.8057 | 7.5292 | ||||||||||||||||||||||||||||
-MQ-7 Sparkfun | -1.329 | 1.8864 | -7.8626 | 9.1056 | -5.4878 | 8.8387 | -1.4065 | 2.0162 | -6.3219 | 9.924 | ||||||||||||||||||||||||||||
MQ-8 Sparkfun | -0.7152 | 2.9891 | -3.419 | 7.3513 | -7.5609 | 15.243 | -7.0753 | 15.396 | -1.7459 | 4.7575 | ||||||||||||||||||||||||||||
MQ9 - Haoyuelectronics | -2.2535 | 2.9855 | -1.6012 | 3.1476 | -1.749 | 2.827 | ||||||||||||||||||||||||||||||||
MQ131- Sensorsportal | -2.7245 | 3.3004 | -1.0333 | 1.7117 | -1.2037 | 1.6455 | ||||||||||||||||||||||||||||||||
MQ135 - HANWEI | -2.7268 | 2.301 | -2.8608 | 1.8627 | -3.2819 | 1.9903 | -5.7015 | 1.1612 | -2.2119 | 2.0473 | -5.9682 | 1.0175 | ||||||||||||||||||||||||||
MQ303A - HANWEI | -2.3543 | 1.144 | -2.4338 | 0.7558 | -2.5597 | 0.4436 | ||||||||||||||||||||||||||||||||
MQ309A - HANWEI | -2.1311 | 3.0886 | -1.6554 | 2.985 | -4.7623 | 6.7413 | -3.7686 | 5.6744 |