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MQ-2 Smoke gas sensor

$2.991pcs
The ADIY MQ-2 is a gas sensor that detects combustible gases and smoke by measuring resistance changes in its sensing material when exposed to gases.
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MQ-3 Alcohol ethanol sensor

$3.001pcs
The ADIY MQ3 is a low-cost alcohol sensor that detects alcohol vapors via conductivity changes in a SnO₂ sensing element, providing fast, sensitive analog and digital outputs for microcontroller-based breath alcohol detection.
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MQ-4 Natural gas sensor

$2.991pcs
The MQ4 is a MOS gas sensor designed for methane and CNG detection, offering fast response, adjustable sensitivity, and an analog voltage output that increases with gas concentration, making it suitable for residential and industrial gas leak detection
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MQ-5 Liquefied gas sensor

$2.991pcs
The DIY MQ5 is a SnO₂-based gas sensor for LPG, natural gas, and coal gas detection, providing adjustable analog and digital outputs for easy integration in residential and industrial gas leak monitoring systems.
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MQ-6 Application scenario

$2.991pcs
The DIY MQ6 is an LPG gas sensor for propane and butane detection, offering a 200–10,000 ppm range with adjustable analog and digital outputs for simple, reliable gas monitoring.
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MQ-7 Carbon monoxide sensor

$2.991pcs
The DIY MQ7 gas sensor provides adjustable analog and digital outputs with LED indication, enabling easy microcontroller integration for real-time gas concentration detection and alerting.
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MQ-8 Hydrogen gas sensor

$2.991pcs
The DIY MQ8 is a hydrogen gas sensor with a 100–10,000 ppm detection range, offering adjustable analog and digital outputs with LED indication for easy integration and real-time hydrogen monitoring.
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MQ-9 Flammable gas sensor

$2.991pcs
The DIY MQ9 is a multi-gas sensor for LPG, CO, and methane detection, featuring conductivity-based sensing with adjustable analog and digital outputs for easy gas leak monitoring and microcontroller integration.
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MQ135 Air Quality Sensor

$2.201pcs
The MQ135 is a semiconductor gas sensor with superior performance, wide measurement range, and high cost-effectiveness
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