MQ-135 Gas Sensor Module For NH3, Alcohol, benzene, smoke , CO2 Detector Module
MQ-135 Gas Sensor Module For NH3, Alcohol, benzene, smoke , CO2 Detector Module
MQ-135 Gas Sensor Module - NH3, Alcohol, Benzene, Smoke & CO2 Detector
Detect hazardous gases and monitor air quality with the MQ-135 Gas Sensor Module from The Tech Depot, Bengaluru. This versatile sensor responds to ammonia (NH3), alcohol vapors, benzene, smoke, and carbon dioxide (CO2), making it ideal for environmental monitoring, safety systems, and IoT-based air quality projects. Features both analog and digital outputs for flexible integration with Arduino, ESP32, Raspberry Pi, and other microcontrollers. Fast shipping, 7-day warranty on manufacturing defects, and dedicated technical support.
Specifications
| Sensor Type | MQ-135 Semiconductor Gas Sensor |
| Detectable Gases | NH3, Alcohol, Benzene, Smoke, CO2, NOx |
| Operating Voltage | 5V DC |
| Output Type | Analog (A0) & Digital (D0) |
| Analog Output Voltage | 0V - 5V (proportional to gas concentration) |
| Digital Output | TTL level (High/Low, threshold adjustable via potentiometer) |
| Detection Range | 10 - 1000 ppm (varies by gas type) |
| Preheat Time | ~20 seconds (recommended 24-48 hours for initial burn-in calibration) |
| Heater Power Consumption | <= 800 mW |
| Sensitivity Adjustment | Onboard potentiometer for digital threshold tuning |
| Indicator LEDs | Power LED & Digital Output Trigger LED |
| Comparator IC | LM393 dual comparator |
| Module Dimensions | ~32 mm x 20 mm x 22 mm |
| Pin Configuration | VCC, GND, A0 (Analog Out), D0 (Digital Out) |
| Operating Temperature | -20 degreesC to 50 degreesC |
| Operating Humidity | <= 95% RH (non-condensing) |
| Compatibility | Arduino, ESP8266, ESP32, Raspberry Pi, STM32, PIC, and other MCUs |
| Origin | Original/Authentic |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Key Features
- Multi-Gas Detection: Sensitive to NH3, alcohol, benzene, smoke, CO2, and other harmful gases - one module for broad air quality monitoring.
- Dual Output Modes: Analog output (A0) provides continuous voltage proportional to gas concentration; digital output (D0) gives a clean HIGH/LOW signal when the adjustable threshold is crossed.
- Onboard Potentiometer: Easily fine-tune the digital trigger sensitivity without any additional components - just turn the trimpot with a screwdriver.
- LM393 Comparator: Reliable and fast signal conditioning ensures stable digital output with minimal noise.
- Status LEDs: Power indicator confirms the module is energized; a second LED lights up when the digital threshold is triggered for instant visual feedback.
- Simple 4-Pin Interface: VCC, GND, A0, and D0 - connect directly to any microcontroller's analog and digital input pins with no external circuitry required.
- Fast Response & Recovery: Quick detection response time and reasonable recovery time allow near-real-time gas concentration tracking.
- Wide Compatibility: Works seamlessly with 5V logic (Arduino Uno, Mega, Nano) and can be interfaced with 3.3V boards (ESP32, ESP8266) using a voltage divider on the analog output.
- Compact & Breadboard-Friendly: Small form factor with standard 2.54 mm pin headers fits directly into breadboards and prototyping setups.
Why Choose The Tech Depot?
- 100% authentic MQ-135 modules sourced directly from trusted and authorized component distributors.
- 1-5 day shipping, 7-8 day delivery across India from our Bengaluru warehouse; same-day delivery available within Bengaluru.
- Expert technical support included - get help with wiring, code, calibration, and project integration via email or WhatsApp.
- 7-day warranty on manufacturing defects with hassle-free replacement on any defective units.
- Thoroughly tested before dispatch to ensure every module works out of the box.
Project Ideas
- Indoor Air Quality Monitor: Build an IoT air quality station using Arduino or ESP32 that measures harmful gas levels in your home, office, or classroom and displays readings on an LCD or sends alerts to your phone via Blynk or MQTT.
- Smart Smoke & Gas Alarm: Create a safety alarm system that triggers a buzzer, sends SMS/email notifications, or activates an exhaust fan when dangerous gas concentrations like smoke
Frequently Asked Questions
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy MQ-135 Gas Sensor Module For NH3, Alcohol, benzene, smoke , CO2 Detector Module Online in India
Purchase the MQ-135 Gas Sensor Module For NH3, Alcohol, benzene, smoke , CO2 Detector Module online at The Tech Depot - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on MQ-135 Gas Sensor Module For NH3, Alcohol, benzene, smoke , CO2 Detector Module with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy MQ-135 Gas Sensor Module For NH3, Alcohol, benzene, smoke , CO2 Detector Module at the best price in India? The Tech Depot offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.