Mencionar nuevamente que todos los sensores MQ como los MQ-2, MQ-3, MQ-7, MQ-135, etc tienen su propia curva y las cuales lo pueden encontrar en sus datasheet correspondientes. Y la forma correcta de calibrar nuestros MQ es usar un instrumento maestro para tomar muestras y con estos puntos calcular las constantes de la curva.
The MQ-3 is an alcohol gas sensor that is available for about $5 from sparkfun. It's easy to use and has sparked the imagination of anyone who has dreamed of building their own Breathalyzer device for measuring the amount of alcohol in the human body.
The sensor's output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC. This sensor comes in a package similar to our MQ-3 alcohol sensor, and can be used with the breakout board below. Documents: Datasheet Wiring ExampleDescription. The Grove sensor series features a set of inexpensive, interesting gas sensor modules. Here, the MQ3 features an alcohol vapor detector, able to detect levels between 0.04~4mg/L.I'm evaluating the MiCS-5524 as a replacement for the Hanwei Electronics MQ-3 ethanol sensor that I'm using in a fermentation monitor application, where the sensor is placed in the headspace above the fermentation broth. I've found that the MiCS-5524 sensitivity falls off by half after 48 hours, and half again after 96 hours. Is this normal andEn el datasheet del MQ-3 muestra que no se trata precisamente de un sensor de ethanol, sino que también es posible detectar otros gases inflamables como el benzeno, hexano, metano, entre otros. Sin embargo, es ante el alcohol que este sensor posee mayor sensibilidad.
May 14, 2011 · Alcohol Sensor MQ-3 has high sensitivity and fast response time. Alcohol Sensor MQ-3 series drivers for alcohol Sensor MQ-3 is very simple, only need 1 piece of variable resistors. Output of Sensor MQ-3 alcohol in the form of an analog voltage that is proportional to the alcohol content is received. Introduction to MQ-7 Carbon Monoxide Sensor. According to its datasheet, the MQ-7 carbon monoxide sensor detects 20 to 2000 ppm of CO in air. Here is its sensitivity characteristic curve: This is a graph of Rs/R0 vs. gas concentration in ppm. Rs is the resistance of the sensor in target gas while R0 is the resistance in clean air.TECHNICAL DATA MQ-3 GAS SENSOR FEATURES * High sensitivity to alcohol and small sensitivity to Benzine . * Fast response and High sensitivity * Stable and long life * Simple drive circuit APPLICATION They are suitable for alcohol checker, Breathalyser. SPECIFICATIONS A. Standard work conditionWhen the alcohol gas exist, the sensor's conductivity gets higher along with the gas concentration rising.It is suitable for various applications of detecting alcohol at different concentration.It is widely used in domestic alcohol gas alarm, industrial alcohol gas alarm and portable alcohol detector.For details,visit the 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, smoke 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.