MQ135 - Air Quality Gas Sensor Module
Description:
The MQ-135 air quality gas sensor module is designed to detect various gases present in the air that can affect air quality, including ammonia (NH3), nitrogen oxides (NOx), benzene, smoke, and other harmful gases. Here's how to effectively use the MQ-135 sensor:
-
Understanding the Sensor: The MQ-135 sensor operates on the principle of a chemical reaction between the gases in the air and the sensor's electrodes, resulting in a change in electrical conductivity. This change is then measured and interpreted as the presence of specific gases.
-
Connections: The MQ-135 sensor typically has four pins: VCC (power supply), GND (ground), AOUT (analog output), and DOUT (digital output). Connect VCC to a suitable power supply (usually 5V), GND to ground, and then either AOUT or DOUT depending on your preferred output type.
-
Calibration: Calibration may be necessary before use. Expose the sensor to clean air for a certain period to establish a baseline reading. Calibration procedures may vary depending on the specific sensor and application, so refer to the manufacturer's instructions.
-
Powering Up: Apply power to the sensor module. Allow a warm-up time (usually a few minutes) for the sensor to stabilize and provide accurate readings.
-
Reading Output: If connected to the AOUT pin, you'll receive an analog voltage output proportional to the concentration of the detected gas in the air. If connected to the DOUT pin, you'll receive a digital signal that switches from low to high when the gas concentration exceeds a certain threshold.
-
Interpretation: Interpret the sensor output based on your project requirements. You may need to use different thresholds or calibration curves for each gas to accurately determine their concentrations.
-
Safety Considerations: Some gases detected by the MQ-135 sensor, such as ammonia and nitrogen oxides, can be harmful to health. Handle the sensor with care and avoid exposure to high concentrations of these gases. Ensure proper ventilation during testing and avoid using the sensor in potentially hazardous environments without appropriate safety precautions.
-
Integration: Integrate the sensor with a microcontroller (e.g., Arduino, Raspberry Pi) for data processing, display, or further action based on the detected gas concentrations.
Reviews
Popular Products
ESP8266 WiFi 5V 1 Channel Relay Module IOT Smart Home Remote Control Switch-HI209
₹172.0
₹160.0
only 25 in stock
STM32F103C6T6 Minimum System Development Board STM32 ARM Core Module-HI210
₹170.0
₹155.0
only 50 in stock
STM32F103C6T6 Minimum System Development Board STM32 ARM Core Module-HI211
₹215.0
₹195.0
only 40 in stock
5A 12V Overcurrent Protection AC Current Detection Sensor Module-HI217
₹245.0
₹230.0
only 25 in stock
GY-271 HMC5883L 3-axis Electronic Compass Module Magnetic Field Sensor-HI218
₹200.0
₹190.0
only 100 in stock
XH-W1219 12V Digital Red and Green Display Temperature Controller Module with NTC Waterproof Temperature Sensor-HI226
₹195.0
₹170.0
only 10 in stock
2.44 cm (0.96 Inch) I2C/IIC 128x64 OLED Display Module 4 Pin - Yellow-Blue Color-HI228
₹185.0
₹170.0
only 25 in stock
TDA7297 12V Stereo Noiseless Audio Power Amplifier Module with 2 x 15W Output-HI235
₹325.0
₹300.0
only 10 in stock
XL4005 - 5A - DSN5000 - High Current - DC-DC Adjustable Step-Down Power Supply Module-HI238
₹90.0
₹80.0
only 25 in stock
TPA3116D2 12 to 24V DC Dual Channel 2 x 80W Audio Power Amplifier-HI248
₹665.0
₹610.0
only 15 in stock
LM2596HVS DC-DC Buck Converter 4.5-50V To 3-40V Adjustable Step Down Power Module-HI253
₹85.0
₹75.0
only 25 in stock
Micro USB LilyTiny LilyPad ATtiny85 Development Board Wearable Module-HI256
₹400.0
₹385.0
only 85 in stock
USB to UART/ESP8266 Adapter Programmer for ESP-01 WiFi Modules with CH340G Chip-HI260
₹75.0
₹65.0
only 50 in stock
LM2596S & LM2577S DC-DC Adjustable Step-Up and step-down Power Supply Module-HI263
₹370.0
₹265.0
only 50 in stock
CH340C WIFI Module Adapter Download Debug for ESP8266 ESP-01/01S-HI265
₹160.0
₹155.0
only 25 in stock
Capacitor Touch Dimmer Constant Voltage LED Stepless Dimming PWM Control Board-HI267
₹55.0
₹45.0
only 15 in stock
CNC Shield V3 - Engraving Machine 3D Printer A4988 DRV8825 Driver Expansion Board-HI279
₹95.0
₹85.0
only 100 in stock
6-30V 1-Channel Power Relay Module with Adjustable Timing Cycle-HI281
₹280.0
₹270.0
only 50 in stock
LM7812 12V DC / AC Three Terminal Voltage Regulator Power Module-HI283
₹110.0
₹100.0
only 25 in stock
DC-DC 4.5-40V To 5V 2A USB Charger Step down Converter Voltmeter Module-HI291
₹160.0
₹140.0
only 10 in stock
CH340G USB to RS232 TTL Auto Converter Adapter Module for Arduino-HI295
₹105.0
₹90.0
only 50 in stock
TTL FTDI Transmitter USB For 3.3V/5V Dual power FT232RL MWC Programmer-HI299
₹225.0
₹200.0
only 10 in stock
Brushless Motor Speed Controller Hall BLDC Driver Board DC 12V to 36V 15A 500W-HI300
₹1085.0
₹1000.0
only 5 in stock
GY-9960-3.3 APDS-9960 RGB Infrared Gesture Sensor Motion Direction Recognition Module-HI301
₹175.0
₹145.0
only 25 in stock
Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino-HI309
₹1025.0
₹900.0
only 10 in stock
CJMCU-4051 74HC4051 8 Channel Analog Multiplexer/Demultiplexer Breakout Board for Arduino-HI310
₹85.0
₹70.0
only 25 in stock
CJMCU TCA9548A I2C 8 Channel Multiple Extensions Development Board-HI311
₹95.0
₹75.0
only 25 in stock
Non-Destructive MP3 Decoding Board with Self-Powered TF Card U Disk Decoded Player Module-HI314
₹115.0
₹105.0
only 100 in stock
LED Traffic Lights Signal Module / Digital Signal Output Traffic Light Module-HI317
₹70.0
₹60.0
only 50 in stock
DOIT Mini Ultra-Small size ESP-M3 Serial WiFi Module Compatible with ESP8266-HI318
₹179.0
₹170.0
only 25 in stock
MAX4466 Electret Microphone Amplifier with Adjustable Gain Module-HI319
₹95.0
₹80.0
only 25 in stock
CT14 Bluetooth 4.2 F Class 5W plus 5W Stereo Audio Amplifier Module with Onboard Micro-USB battery Charging-HI324
₹185.0
₹175.0
only 25 in stock
XY-DJ DC 6-40V LED Battery Charger Discharger Board Under Over Voltage Protection Module-HI331
₹340.0
₹325.0
only 25 in stock
XH-M601 12V Battery Charging Control Board Intelligent Charger Power Control Panel Automatic Charging Power Module-HI337
₹235.0
₹210.0
only 25 in stock
20A PWM DC Motor Speed Regulator Module (9V, 12V, 24V, 36V, 48V, 60V)-HI338
₹325.0
₹290.0
only 15 in stock
Tower Pro MG996R Digital Metal Gear High Torque Servo Motor (180 Degree Rotation)-HI604
₹215.0
₹205.0
only 25 in stock
20CM DuPont Wire Color Jumper Cable 2.54mm 1P-1P Female to Female - 40 Pieces Pack-HI610
₹52.0
₹46.0
only 25 in stock
3S 11.1V 10A 18650 Lithium Battery Overcharge And Over-current Protection board-Good Quality-HI614
₹92.0
₹85.0
only 25 in stock
3S/4S/5S 12V/16.8V/21V 100A BMS for Lithium Battery with Balance Charging-HI615
₹425.0
₹400.0
only 25 in stock
Double BTS7960 43A H-Bridge High-Power Stepper Motor Driver Module-HI357
₹320.0
₹300.0
only 25 in stock
MH-M18 Wireless Bluetooth Audio Receiver Board Module BLT 4.2 mp3 lossless decode-HI359
₹110.0
₹90.0
only 50 in stock
12v-24v to 5V 3A Super Mini Super Size DC Step-Down Module With 97.5 percent Efficiency-HI617
₹75.0
₹65.0
only 25 in stock
1.5V 1.8V 2.5V 3V 3.3V 3.7V 4.2V to 5V DC-DC Boost Converter Step-Up Module-HI619
₹90.0
₹82.0
only 25 in stock
Mini LED Light Ultra-thin Ultra-light Portable USB Small LED Lamp Camping Night Light-HI625
₹30.0
₹25.0
only 25 in stock
USB 3.1 Female Socket Type C Connector 24 Pins Breakout PCB Board-HI626
₹90.0
₹80.0
only 25 in stock
3 Series 20A 18650 Lithium Battery Protection Board 11.1V 12V 12.6V-HI627
₹70.0
₹60.0
only 25 in stock
2S 3A Li-ion Lithium Battery 7.4V 8.4V 18650 Charger Protection Board Module-HI629
₹90.0
₹80.0
only 25 in stock
4 Series 30A 18650 Lithium Battery Protection Board 14.8V 16V with Cable-HI632
₹190.0
₹175.0
only 25 in stock
PT100-S Waterproof 30mm Stainless Steel Pole Probe Temperature Sensor-HI634
₹120.0
₹110.0
only 25 in stock
GY-9833 AD9833 Programmable Sine Square Wave DDS Signal Generator-HI635
₹340.0
₹310.0
only 25 in stock
W25Q64 Storage 64Mbit 8MByte Data Flash module SPI Interface BV/FVinter-HI636
₹60.0
₹50.0
only 25 in stock
ESP8266/ ESP-12E Module/ Serial WIFI Witty Cloud Development Board + MINI nodeMCU-HI638
₹255.0
₹230.0
only 25 in stock
MLX90614 ESF Non-Contact Human Body Infrared Temperature Measurement Module-HI640
₹790.0
₹700.0
only 25 in stock
TPA3116 2.1 50Wx2+100W Bluetooth CSR4.0 Class D Power Amplifier-HI642
₹3050.0
₹2650.0
only 25 in stock
D203B Dual Elements Passive Infrared PIR Sensor Used for Alarm System-HI645
₹80.0
₹65.0
only 25 in stock
5A Constant Current / Voltage LED Drives Lithium Battery Charging Module-HI364
₹125.0
₹110.0
only 25 in stock
LM2596 DC-DC Buck Converter Step Down Power Supply Module with Digital Voltage Display-HI650
₹160.0
₹145.0
only 25 in stock
WT588D-16P Voice Sound Audio Player Module DC 2.8V-5.5V for Arduino-HI652
₹255.0
₹235.0
only 25 in stock
STM32F103C8T6 Minimum System Development Board STM32 ARM Core Module-HI654
₹165.0
₹150.0
only 25 in stock
Digital Multi Servo Tester ESC CCPM Consistency Master Speed Control-HI658
₹80.0
₹70.0
only 25 in stock
SX1278 LoRa Module Ra- 02 433MHZ Wireless Spread Spectrum Transmission-HI370
₹455.0
₹405.0
only 25 in stock
I2C ADS1115 16 Bit ADC 4 channel Module with Programmable Gain Amplifier-HI372
₹165.0
₹145.0
only 25 in stock
NRF24L01 2.4GHz PA+LNA SMA Wireless Transceiver Module with Antenna-HI375
₹145.0
₹130.0
only 25 in stock
NE555 Frequency Adjustable Pulse Square Wave Signal Generator Module-HI383
₹35.0
₹30.0
only 100 in stock
18 cm (7 inch) LCD Capacitive Touch Screen Display with HDMI for Raspberry Pi (800 x 480 Resolution)-HI663
₹3500.0
₹3350.0
only 25 in stock
2.8 inch TFT Touch Screen Display Module with SPI Interface 240x320-HI666
₹1300.0
₹1215.0
only 25 in stock
2.44 cm (0.96 Inch) I2C/IIC 128x64 OLED Display Module 4 Pin - Blue Color-HI668
₹150.0
₹135.0
only 25 in stock
2.44 cm (0.96 Inch) I2C/IIC 128x64 OLED Display Module 4 Pin - White Color-HI669
₹160.0
₹145.0
only 25 in stock
XY-016 2A DC-DC Step Up 5V 9V 12V 28V Power Module with Micro USB-HI393
₹50.0
₹40.0
only 50 in stock
TDA7297 12V Stereo Noiseless Audio Power Amplifier Module with 2 x 15W Output-HI399
₹0.0
₹0.0
only 10 in stock
150W DC-DC Step-Up Boost Converter 10-32V to 12-35V 6A Adjustable Power Supply Module-HI400
₹135.0
₹120.0
only 25 in stock
12-80V DC 600W High Power Adjustable Voltage Constant Current Module-HI402
₹715.0
₹700.0
only 10 in stock
SX1308 DC-DC Step Up Adjustable Power Supply 28V 2A 1.2Mhz Power Booster Module-HI404
₹45.0
₹30.0
only 50 in stock
300W 20A DC-DC Buck Converter Step-down Module Constant Current LED Driver Module-HI408
₹459.0
₹435.0
only 25 in stock
300W 10A DC-DC Step-down Buck Converter Adjustable Constant Voltage Module-HI409
₹270.0
₹255.0
Out of Stock
SCT-013-000 100A Non-Invasive AC Current Sensor Split Core Type Clamp Meter Sensor-HI410
₹345.0
₹310.0
only 10 in stock
Sound Detection Sensor Module for Intelligent Vehicle Arduino Compatible-HI411
₹45.0
₹30.0
Out of Stock
DC12-24V TPA3116D2 2.1 Channel Digital Subwoofer Power Amplifier Board-HI412
₹795.0
₹735.0
only 10 in stock
Digital Voltmeter (0-100V) and Ammeter (10 A) Dual Led Voltage Current Measurement Module-HI413
₹89.0
₹85.0
only 100 in stock
12V-60V DC Lead-Acid Digital Battery Capacity Indicator Charge Tester Voltmeter-HI421
₹135.0
₹120.0
only 100 in stock
XH-W3001 220V AC 1500W Digital Temperature Controller Microcomputer Thermostat Switch Module-HI677
₹145.0
₹135.0
only 25 in stock
9-50V 2000W 40A DC Electronic Speeder PWM Motor Speed Controller 12/24/36/50V-HI422
₹375.0
₹335.0
only 10 in stock
1800W 40A DC to DC Adjustable Constant Voltage and Current Power Supply Module-HI424
₹2250.0
₹2100.0
Out of Stock
PICkit3 Debugger Programmer Emulator Controller Development Board-HI428
₹1950.0
₹1750.0
Out of Stock
ATmel MCU ATMEGA2560-16U MEGA 2560 R3 Improved Version CH340G Board-HI431
₹999.0
₹899.0
only 25 in stock
XL4015 - 5A Lithium Charger DC-DC Adjustable Step Down Power Supply Module-HI682
₹70.0
₹60.0
only 25 in stock
CH341A 24 25 Series EEPROM Flash BIOS USB Programmer with Software & Driver-HI683
₹200.0
₹185.0
only 25 in stock
PCA9685 - 16 Channel 12-Bit PWM Servo Motor Driver I2C Module For Arduino-HI684
₹275.0
₹250.0
only 25 in stock
DC to DC 6-24V to 5V USB Output Step Down Power Charger with Adjustable Buck Converter-HI687
₹55.0
₹48.0
only 99 in stock
TP4056 1A Li-Ion Lithium Battery charging Module with Current Protection - Micro USB-HI688
₹20.0
₹18.0
only 25 in stock
TP4056 1A Li-ion lithium Battery Charging Module With Current Protection - Type C-HI689
₹52.0
₹45.0
only 25 in stock
SimonK 30A BLDC ESC Electronic Speed Controller with Connectors - Red Color-HI432
₹325.0
₹300.0
only 25 in stock
TB6600 Stepper Motor Driver Controller 4A 9-42V TTL 16 Micro-Step CNC 1 Axis-HI693
₹425.0
₹375.0
only 25 in stock
LJ12A3-4-Z/BX Tube Type Inductive Proximity Sensor Detection Switch NPN DC6-36V 4mm Normally Open switch-HI695
₹140.0
₹125.0
only 25 in stock
WT588D-16P Voice Sound Audio Player Module DC 2.8V-5.5V for Arduino-HI696
₹295.0
₹260.0
only 25 in stock
Precision 5V 700mA (3.5W) Isolation Power Supply Module AC-DC Step- Down Module 220V to 5V-HI704
₹100.0
₹90.0
only 25 in stock
CJMCU-219 INA219 I2C Interface No Drift Bi-directional Current / Power Supply Monitoring Module-HI705
₹200.0
₹180.0
only 25 in stock
RS485 to TTL Converter Module Serial Port UART Hardware Automatic Flow Control Module-HI724
₹90.0
₹70.0
only 25 in stock
ADS1115 16-Bit I2C ADC 4-Channel Programmable Gain Amplifier Module-HI727
₹178.0
₹160.0
only 25 in stock
TM1637 4 Digits 7 Segment Led Display Module with Clock for Arduino-HI731
₹40.0
₹35.0
only 25 in stock
MPR121 Breakout V12 Capacitive Touch Sensor Controller Module I2C keyboard-HI732
₹55.0
₹50.0
only 25 in stock
ADS1115 16-Bit I2C ADC 4-Channel Programmable Gain Amplifier Module-HI733
₹175.0
₹160.0
only 25 in stock
CJMCU-2551 MCP2551 CAN Protocol Controller High-speed Interface Module-HI734
₹130.0
₹120.0
only 25 in stock
ZMCT103C 5A Range Single-Phase AC Current Transformer Sensor Module-HI735
₹100.0
₹85.0
only 25 in stock