Gas Sensor
Gas sensors, also known as gas detectors or gas leak detectors, are critical electronic components used to detect toxic, combustible, or hazardous gases and measure gas concentrations in various environments. These sensors are essential for safety, air quality monitoring, and industrial automation.
Our collection includes a broad range of high-performance gas sensors, including the popular MQ series:
- MQ-2 – Methane, Butane, LPG, Smoke
- MQ-3 – Alcohol, Ethanol, Smoke
- MQ-4 – Methane, CNG Gas
- MQ-5 – Natural Gas, LPG
- MQ-6 – LPG, Butane
- MQ-7 – Carbon Monoxide
- MQ-8 – Hydrogen Gas
- MQ-9 – Carbon Monoxide, Flammable Gases
- MQ131 – Ozone
- MQ135 – Air Quality (CO, Ammonia, Benzene, Alcohol, Smoke)
- MQ136 – Hydrogen Sulfide
- MQ137 – Ammonia
- MQ138 – Benzene, Alcohol, Propane, Formaldehyde, Hydrogen
- MQ214 – Methane, Natural Gas
We feature gas sensors from top global brands, including:
DFROBOT, WINSEN, ASAIR, ACEBOTT, SHARP MICROELECTRONICS, AOSONG, SHARP, RENESAS, PLANTOWER, SENSIRION, INFINEON, MEMSFRONTIER, MASTECH, SEEED STUDIO, FIGARO, MIKROE, PIMORONI, ADAFRUIT, and WAVESHARE.
Whether you’re working on prototyping, air purification systems, or smart industrial controls, our gas sensors offer precision, durability, and peace of mind.
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MP-2 MP503 Smoke detection Sensor Module
Olimex
KES750.00Description MP - 2 smoke detection gas sensor adopts multilayer thick film manufacture process, Al in miniature2O3 Both sides of the ceramic substrate heater and metal oxide semiconductor gas sensitive layer respectively, sealing In a metal...- SKU:
- PEMSV94
KES750.00 -
MP-4 MP503 Combustible Gas Sensor Module
Olimex
KES750.00Description MP - 4 combustible gas sensors using multilayer thick film manufacture process, in miniature Al2O3Both sides of the ceramic substrate respectively make heater and MOS Gas sensitive layer, encapsulated within the metal shell.When the...- SKU:
- PEMSV92
KES750.00 -
MQ-131 ozone gas sensor Module
Olimex
KES3,250.00Sensitive material of the MQ131 gas sensor is O3 SnO2, which with lower conductivity in clean air. When Ozone gas exists. The sensor’s conductivity is more higher along with the gas concentration rising. Please use simple electro circuit, Convert...- SKU:
- PEOSO82
KES3,250.00 -
TGS822 alcohol gas sensor
Olimex
KES1,900.00Tgs-822 for the detection of vapors of organic solvents The element of detecting figaro gas sensors is Tin Oxide (SNO2) which has a low conductivity semiconductor in clean air. In the presence of detected gas, the increasing conductivity sensor depends...- SKU:
- PEDDF48
KES1,900.00 -
SOLD OUT
MQ-137 NH3 Ammonia Gas Sensor
Olimex
KES3,500.00Description: Size: 32mm X22mm X30mm length * width * height Main chip: LM393, NH3 gas sensing probe Working voltage: DC 5V Features: 1. It has a signal output indicator indication; 2. Dual signal output (analog output and TTL level...- SKU:
- PESLF99
KES3,500.00 -
MQ-136 Hydrogen Sulfide Gas Sensor
Olimex
KES3,500.00Description: Size: 32x22 x27 mm Main chip: LM393, ZYMQ-135 gas sensor Operating voltage: 5 V DC Features: - Signal output indication. - Dual signal output (analog output and TTL level output) The output signal of - TTL is low. When...- SKU:
- PESLF98
KES3,500.00 -
TGS822 - alcohol gas sensor
Olimex
KES900.00Tgs-822 for the detection of vapors of organic solvents The element of detecting figaro gas sensors is Tin Oxide (SNO2) which has a low conductivity semiconductor in clean air. In the presence of detected gas, the increasing conductivity sensor depends...- SKU:
- PEDDF49
KES900.00 -
SOLD OUT
MH-Z14A CO2 Carbon Dioxide Sensor
Olimex
KES4,000.00Description: MH-Z14A CO2 gas sensor is a general intelligent small sensor, using the non-dispersive infrared (NDIR) principle to detect carbon dioxide in air, and has a good selectivity and no oxygen dependence, long service life.It has built-in...- SKU:
- PEDER48
KES4,000.00 -
MQ Series Sensors 6 -Pin Universal
Dikavs
KES80.00Description: This is mounting base socket for MQ2/MQ3/MQ7/MQ9/MQ135 gas sensors To make gas sensor more reliable to connect. It is 7 pins plastic socket, to match with semiconductor sensor use. It could be soldered on gas alarm pcb board directly, then...- SKU:
- PEDAD49
KES80.00 -
MS-1100 Formaldehyde Benzene Gas Sensor
Olimex
KES1,500.00Technical Parameters:1.The heating voltage:5V+/-2%2.Working current:100mA (max)3.The circuit voltage:<DC 12V4.Sensitivity:>3%5.Response time:<5s (preheat 3-5 minutes)6.Response time:>10s7.The component power consumption: =<430mW8.Working...- SKU:
- PEGPS25
KES1,500.00 -
ZE08-CH2O Formaldehyde sensor
Olimex
KES3,000.00High sensitivity, high resolution- Low power consumption- Support various output: UART, PWM, analog voltage signal and so on- High stability, superior anit-interval ability:- Application: air quality sensor, ventilation system, air conditioner...- SKU:
- PEFSS62
KES3,000.00 -
SOLD OUT
F08406 MG811 CO2 Carbon Dioxide Sensor
Olimex
KES5,000.00If you want to make a project with carbon dioxide sensors also need a good range sensing property on this sensor then this module is good for you. This sensor measures gaseous carbon dioxide levels by monitoring the amount of infrared (IR) radiation...- SKU:
- PEFOR25
KES5,000.00 -
MH-Z19 infrared CO2 sensor for CO2 monitor
Olimex
KES5,000.00Descriptions MH-Z19B carbon dioxide gas sensor (hereinafter referred to as the sensor) is a general-purpose intelligent small-scale sensor that uses non-dispersive infrared (NDIR) principle to detect the presence of CO2 in the air, with a good...- SKU:
- PEWMZ15
KES5,000.00 -
SOLD OUT
MQ-4 Methane Gas Sensor
Olimex
KES300.00Specification: - The gas sensing material used in the MQ-4 gas sensor is tin dioxide (SnO2) with low conductivity in clean air. - When there is a flammable gas in the environment where the sensor is located, the conductivity of the sensor increases as...- SKU:
- PELPG12
KES300.00 -
MQ-131 ozone gas sensor
Olimex
KES3,200.00Sensitive material of the MQ131 gas sensor is O3 SnO2, which with lower conductivity in clean air. When Ozone gas exists. The sensor’s conductivity is more higher along with the gas concentration rising. Please use simple electro circuit, Convert...- SKU:
- PEOSO88
KES3,200.00 -
MQ-6 Combustible Gas Sensor
Olimex
KES300.00Features : - Sensitive material MQ-6 gas sensor is used to clean the air in the lower conductivity of tin dioxide (SnO2). When there is the environment in which the combustible gas sensor , conductivity sensor with increasing concentration of...- SKU:
- PELPG62
KES300.00 -
SOLD OUT
MQ-8 Hydrogen Gas Sensor
Olimex
KES300.00Features : - MQ-8 gas sensor sensitive material used in clean air conductivity is lower tin dioxide (SnO2). When the sensor is present in the environment in which the combustible gas, the sensor's conductivity increases with the concentration of...- SKU:
- PESLF95
KES300.00 -
SOLD OUT
MQ-2 Gas LPG Sensor
Olimex
KES300.00Features:1. Using high-quality dual-panel design, with power indicator and TTL signal output instructions2. there are four screw holes for easy positioning3. Analog output voltage with the higher concentration of higher voltage4. TTL output valid signal...- SKU:
- PESGL52
KES300.00 -
SOLD OUT
MQ-3 Alcohol Ethanol Sensor
Olimex
KES300.00Alcohol Ethanol Sensor Breath Gas Ethanol Detection MQ-3 for Arduino Alcohol Detector Condition: New Size: approx. 32 x 22 x 27mm Main chip: LM393, ZYMQ-3 gas detector Working Voltage: DC 5V With signal ouput instructions Two-way signal...- SKU:
- PEMQD23
KES300.00 -
MQ-5 LPG, natural gas, coal gas Sensor
Olimex
KES300.00Features : - Sensitive material MQ-5 gas sensor is used to clean the air in the lower conductivity of tin dioxide (SnO2). When there is the environment in which the combustible gas sensor , conductivity sensor with increasing concentration of...- SKU:
- PEMNS45
KES300.00