Mq 3 Gas Sensor

4 8 out of 5 stars 9.

Mq 3 gas sensor. I used 5vdc and the sensor draws 133ma. A gas sensor is a device which detects the presence or concentration of gases in the atmosphere. 4 1 please contact us by email skype wechat for technology support our response may be delay you can just leave your questions we will reply to you as soon as possible in working time. When the target alcohol gas exist the sensor s conductivity gets higher along with the gas concentration rising.

Increase decrease add to cart. Get it as soon as fri sep 18. The output voltage from the gas sensor increases when the concentration of gas increases. 4 79 2 4 49 3 4 39 4 share.

Here we see the different curves for each gas the mq 3 can detect in a log log plot. Use a 10k 1 resistor. 1 16 of 200 results for mq 3 gas sensor cjrslrb gas detection module mq 2 mq 3 mq 4 mq 5 mq 6 mq 7 mq 8 mq 9 mq 135 sensor module each of them 1pcs total 9pcs sensor kit. Free shipping on your first order shipped by amazon.

For detailed information about the mq 3 sensor please refer to the data sheet provided in resources section. Mq 3 gas sensor brand. Based on the concentration of the gas the sensor produces a corresponding potential difference by changing the resistance of the material inside the sensor which can be measured as output voltage. The heater provides necessary work conditions for work of.

Output voltage boosts along with the concentration of the measured gases increases. We can use the fact from the graph above that the rs r0 ratio is a constant 60 in clean air. I have been testing the alcohol gas sensor mq 3 for a day or so now and here is what i have learened. Meaning that you have to keep power applied for that long before the readings will settle and become reliable.

Sensitive material of mq 3 gas sensor is sno 2 which with lower conductivity in clean air. Sensitive for alcohol ethanol. Mq 3 module is suitable for detecting alcohol benzine ch 4 hexane lpg co sensitive material of mq 3 gas sensor is sno 2 which with lower conductivity in clean air when the target alcohol gas exist the sensor s conductivity is more higher along with the gas concentration rising. Brief detail about mq 3 gas sensor.

Rs is the resistance of the sensor at target gas while r0 is the resistance of the sensor when only 0 4 mg l of alcohol is present in air. It takes 48 hours to fully condition the sensor. 1 configuration a or b sensor composed by micro al2o3 ceramic tube tin dioxide sno2 sensitive layer measuring electrode and heater are fixed into a crust made by plastic and stainless steel net. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.

Structure and configuration of mq 3 gas sensor is shown as fig. Sensitivity can be adjusted by varying the potentiometer.