9PCS MQ Sensor Suite Kit – MQ-2/3/4/5/6/7/8/9/135 for Smoke, Alcohol, Methane, LPG, CO, H₂, Air Quality Industrial & DIY Electronics
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$17.99
Complete Gas Detection Ecosystem: 9 premium sensors covering all critical gases—smoke (MQ-2), alcohol (MQ-3), methane (MQ-4), LPG (MQ-5/6), CO (MQ-7), H₂ (MQ-8), dual-gas CO/combustible (MQ-9), and air quality/VOCs (MQ-135)—replace $300+ of individual sensors.
Plug-and-Play Universal Design: Identical 5V DC operation, analog/digital outputs, and 32mm×20mm mounting holes for seamless integration with Arduino/Raspberry Pi/ESP32—no extra adapters needed.
Professional-Grade Accuracy: Factory pre-calibrated with ±5% tolerance; includes sensitivity adjustment potentiometers on every module for lab/industrial precision.
