{"product_id":"kit-lab-gas-monitor-kit-with-arduino-uno-plus-sensor","title":"Lab Gas Monitor Kit with Arduino Uno + Sensor","description":"\u003ch1\u003eArduino Lab Gas Monitor Kit – MQ-2 Sensor Alarm with Buzzer, Flashing LED, and Exhaust Control\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Intermediate\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 3-4 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 15-18\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Gas sensor threshold calibration \u0026amp; relay automation\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eIn a school chemistry lab or college electronics workshop, invisible gas leaks can turn hazardous in seconds. This kit equips you to build an active ventilation safety system — the kind of proactive safeguard that CBSE lab manuals and Smart India Hackathon evaluators look for. By the time you finish, you’ll have a live gas monitor whose MQ-2 sensor watches for combustible fumes, then triggers a piercing buzzer, a mains-ready exhaust fan relay, and a trio of alert LEDs the moment the safe ppm limit is crossed.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA tabletop safety unit centred on an Arduino Uno that continuously samples air quality. Once the MQ-2’s analog reading surpasses your calibrated threshold, the active buzzer blares, the 5V relay switches on a 12V exhaust fan (or any ventilation device you connect), and three red LEDs flash in unison — ensuring the alarm is seen and heard even in a noisy lab environment. The result is a complete ventilation‑response system that you can demonstrate in action using a small fume source.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eReading MQ‑2 analog output and converting it to real‑world ppm thresholds for methane, LPG, and smoke\u003c\/li\u003e\n  \u003cli\u003eCalibrating sensor sensitivity using the serial monitor so the alarm triggers only above genuinely unsafe concentrations\u003c\/li\u003e\n  \u003cli\u003eWiring a 5V relay module with a flyback diode to safely switch a 12V exhaust fan without damaging the Arduino\u003c\/li\u003e\n  \u003cli\u003eCoding conditional logic that simultaneously activates a buzzer, flashing LEDs, and a relay based on a single analog threshold\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMQ-2 Gas Sensor\u003c\/td\u003e\n\u003ctd\u003ex\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eLab Safety — MQ-2 gas sensor triggers buzzer, relay exhaust fan and flashing LED above safe ppm threshold. Ventilation response.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/mq-2-smoke-gas-sensor-module-lpg-propane-methane-detection\"\u003eMQ-2 Gas Sensor\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/4-channel-relay-board-for-esp32-30-pin-5v-control\"\u003e5V Relay Module\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/active-buzzer-dc-3-5v-85db-sounder-module-for-arduino-raspberry-pi\"\u003eActive Buzzer\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/led-variety-pack-50-pcs-3mm-5mm-mixed-colours\"\u003e5mm Red LED\u003c\/a\u003e x3\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/diode-variety-pack-1n4007-1n4148-1n5819-zener-assortment\"\u003e1N4007 Diode\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x25\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/12v-2a-dc-adapter-reliable-power-supply-for-projects\"\u003e12V Adapter\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Lab Gas Monitor Kit with Arduino Uno + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Lab Gas Monitor Kit with Arduino Uno + Sensor includes all components needed: Arduino Uno R3, MQ-2 Gas Sensor, 5V Relay Module, Active Buzzer, 5mm Red LED and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Lab Gas Monitor Kit with Arduino Uno + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Intermediate level makers, suitable for ages 15-18. Lab Safety — MQ-2 gas sensor triggers buzzer, relay exhaust fan and flashing LED above safe ppm threshold. Ventilation response. Estimated build time is 3-4 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Lab Gas Monitor Kit with Arduino Uno + Sensor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Lab Gas Monitor Kit with Arduino Uno + Sensor is available online at Compoden (compoden.in), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 business days across India.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"Lab Gas Monitor Kit with Arduino Uno + Sensor\",\n  \"description\": \"Lab Safety — MQ-2 gas sensor triggers buzzer, relay exhaust fan and flashing LED above safe ppm threshold. 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