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Carbon Monoxide & Flammable Gas Sensor MQ-9
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Carbon Monoxide & Flammable Gas Sensor MQ-9
This semiconductor gas sensor detects the presence of Carbon Monoxide at concentrations from 10 to 1,000 ppm and combustible gas from 100 to 10,000 ppm. The sensor’s simple analog voltage interface requires only one analog input pin from your microcontroller.
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This Carbon Monoxide (CO) and flammable gas sensor detects the concentrations of CO and combustible gas in the air and ouputs its reading as an analog voltage. The sensor can measure concentrations of CO from 10 to 1,000 ppm and flammable gas from 100 to 10,000 ppm.The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V. Please read the MQ9 datasheet (180k pdf) for more information about the sensor.
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Gas sensor with orange plastic case bottom view. |
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Connecting five volts across the heating (H) pins keeps the sensor hot enough to function correctly. Connecting five volts at either the A or B pins causes the sensor to emit an analog voltage on the other pins. A resistive load between the output pins and ground sets the sensitivity of the detector. Please note that the picture in the datasheet for the top configuration is wrong. Both configurations have the same pinout consistent with the bottom configuration.The resistive load should be calibrated for your particular application using the equations in the datasheet, but a good starting value for the resistor is 20 kΩ.
We offer two breakout boards that make it easier to interface with these sensors: a Pololu carrier board and a SparkFun carrier board. The Pololu version is shown below.
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Pololu MQ Gas Sensor Carrier |
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Flammable Gas & Smoke Sensor MQ-2 |
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Angular contact strip in black, double-breasted, female, 2x5, pitch 2.54mm, THT, RoHS. PBD10R
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Panasonic Eneloop PRO R6/AA rechargeable batteries with a minimum capacity of 2500mAh and a voltage of 1.2V. The set contains four pieces sold in a reusable packaging. Panasonic BK-3HCDE/4LE
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No product available!
Development kit with TLV493D sensor. The board has a built-in J-Link programmer, XMC1100 microcontroller (Cortex-M0, 64kB Flash memory, 16kB RAM) and a three-plane magnetic field sensor TL493D. TLV493D-A1B6 2 GO KIT
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No product available!
No product available!
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ROSA3D filament made of high quality PVB. 0.5 kg of filament with a diameter of 1.75 mm is wound on the spool. ROSA3D PVB Smooth Turquoise
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MODULE FOR CONTROLLER COMFORTABLE DIRECTION INDICATORS - PRINTED BOARD AND PROGRAMMED LAYOUT
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The case is made of ABS, designed for Raspberry Pi Zero W minicomputers. The user has free access to all minicomputer ports, including the GPIO connector
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Audio recorder module that allows for multiple recording and playback of sounds up to 6 seconds long
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Carbon Monoxide & Flammable Gas Sensor MQ-9