--- product_id: 418035428 title: "MQ-135 MQ135 Air Quality Gas Smoke Detection Sensor Module Compatible with Arduino and Raspberry Pi, Including E-Book!" brand: "azdelivery" price: "R639" currency: ZAR in_stock: true reviews_count: 5 category: "Az Delivery" url: https://www.desertcart.co.za/products/418035428-mq-135-mq135-air-quality-gas-smoke-detection-sensor-module store_origin: ZA region: South Africa --- # Low power 350mW heating Compact 30x20mm size Fast heating ≤30s MQ-135 MQ135 Air Quality Gas Smoke Detection Sensor Module Compatible with Arduino and Raspberry Pi, Including E-Book! **Brand:** azdelivery **Price:** R639 **Availability:** ✅ In Stock ## Summary > 🌬️ Breathe smarter, code faster — your air quality watchdog awaits! ## Quick Answers - **What is this?** MQ-135 MQ135 Air Quality Gas Smoke Detection Sensor Module Compatible with Arduino and Raspberry Pi, Including E-Book! by azdelivery - **How much does it cost?** R639 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/418035428-mq-135-mq135-air-quality-gas-smoke-detection-sensor-module) ## Best For - azdelivery enthusiasts ## Why This Product - Trusted azdelivery brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid Response Time:** Measures gas concentration changes in under 1 second - • **Customizable Threshold Alerts:** Built-in potentiometer for tailored digital output triggers - • **Comprehensive Developer Support:** Includes eBook, libraries & expert guides for fast project deployment - • **Precision Air Quality Monitoring:** Detects NH3, NOx, CO2, smoke & more with ≥3% accuracy - • **Plug & Play Microcontroller Ready:** Seamlessly integrates with Arduino & Raspberry Pi (AD converter needed) ## Overview The AZ-Delivery MQ-135 is a compact, highly sensitive air quality sensor module designed for Arduino and Raspberry Pi projects. It detects a wide range of harmful gases including NH3, NOx, CO2, benzene, and smoke with fast response times and ≥3% accuracy. Featuring low power consumption and a quick heating element, it offers both analog and digital outputs with customizable thresholds. Perfect for smart home, environmental monitoring, and robotics applications, it comes with extensive documentation and support to accelerate your innovation. ## Description The AZ-Delivery MQ-135 air quality sensor is a ready-to-use module for Arduino and Raspberry Pi to measure the concentration of various toxic gases such as benzone, alcohol, smoke and airborne pollutants. The MQ-135 measures a gas concentration from 10 to 1000ppm and is ideal for detecting a gas leak, as a gas alarm or for other robotics and microcontroller projects.The MQ series sensors use a small heating element with an electronic-chemical sensor, which are suitable for indoor use.The sensor has a high sensitivity and fast response time, but needs a few minutes to give accurate readings because the sensor needs to heat up first. The measured values of the sensor are output as analogue values, which can be easily evaluated with a microcontroller.This sensor is ready for connection to a microcontroller, such as an Arduino board. For use with a Raspberry Pi an additional AD converter is required.Pin assignment:VCC - power supply 5VGND - ground connectionAOUT - Analog OutputDOUT - Digital OutputThe module has a potentiometer for setting the threshold value. At the digital pin, the sensor outputs only a 0 or 1, depending on whether the set threshold value is exceeded.Caution: The sensor gets warm during operation!For further ideas and projects please visit our blog on the internet or download our free eBooks on our website!AZDelivery is a trademark which is registered at the DPMA (German Trademark and Patent Office). According to § 14 (2) MarkenG third parties are prohibited from using this trademark in the course of trade.AZ-Delivery ⭐⭐⭐⭐⭐ Your expert for microelectronics If you are looking for the high quality products for Arduino and Raspberry Pi, AZ-Delivery Vertriebs GmbH ⭐⭐⭐⭐⭐ is the right company to get it from. You will be provided with numerous application examples, full installation guides, eBooks, libraries and assistance from our technical experts. Review: Wat de sensor precies meet is niet helemaal duidelijk, omdat hij één waarde weergeeft, maar gevoelig is voor meerdere gassen, waaronder CO2. Als grove indicatie is hij echter gevoelig genoeg om verschillen in gasconcentraties te meten. Zo gebruikte ik hem om het fermentatieproces van wijn te volgen, door de sensor boven het waterslot van een gistingsvat te hangen. Eerst de concentratie in de omgeving gemeten, die leverde een waarde op van ongeveer 250ppm. Boven het waterslot schoot de waarde omhoog naar zo'n 450ppm. De waarde daalde geleidelijk naarmate het gistingsproces op zijn eind liep. Ik heb de waarde uitgelezen met een NodeMCU module (een 8266 model) en via een simpel scriptje naar mijn Domoticz smarthome systeem gestuurd. Volledige beschrijving volgt nog wel op mijn website Robothuis, als ik er de tijd voor vind. Review: These work weii and within spec. ## Features - ✔️ AZ-Delivery MQ135 Air Quality Gas Smoke Detection Sensor Modules for Arduino and Raspberry Pi are used in air quality control equipment for buildings/offices, and are suitable for detecting NH3, NOx, alcohol, Benzene, smoke, CO2 ,etc. - ✔️ Resolution: 10~1000ppm // Sensitive resistance: 2KΩ to 20KΩ in 100ppm CO // Accuracy: ≥ 3% // Response time: ≤ 1s // Response time after power on: ≤ 30s // Heating current: ≤ 180mA // Heating voltage: 5.0V±0.2V / 1.5±0.1V // Input voltage: 5V // Heating energy output approx.: 350mW. - ✔️ MQ135 Air Quality Gas Smoke Detection Sensor Module sensor is ready for connection to a microcontroller, e.g. an arduino board. For use with a Raspberry Pi, an AD converter is required. - ✔️ Dimensions MQ135 Air Quality Gas Smoke Detection Sensor Module are approximately: 30 mm (length) x 20 mm (width). - ✔️ Welcome to the AZ-Delivery family! For top quality microelectronics, we are your go to. ⭐️⭐️⭐️⭐️⭐️We provide an array of application examples, full installation guides, eBooks, libraries, and all-round assistance. AZ-Delivery, your microelectronics expert. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07CNR9K8P | | ASIN | B07CNR9K8P | | Batteries Included? | No | | Batteries Required? | No | | Customer Reviews | 4.3 4.3 out of 5 stars (214) | | Customer reviews | 4.3 4.3 out of 5 stars (214) | | Date First Available | 10 March 2019 | | Date First Available | 10 March 2019 | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 30 g | | Manufacturer | AZDelivery | | Manufacturer | AZDelivery | | Manufacturer reference | 1x MQ-135 Capteur | | Manufacturer reference | 1x MQ-135 Capteur | | Package Dimensions | 10.1 x 6 x 2.1 cm; 30 g | | Package Dimensions | 10.1 x 6 x 2.1 cm; 30 g | | Part number | 1x MQ-135 Capteur | | Power source type | Battery Powered | | Size | 1x Gas Sensor | | Style | Modern | ## Product Details - **Alarm:** Audible - **Brand:** AZDelivery - **Number of Items:** 1 - **Power source:** Battery Powered - **Style:** Modern ## Images ![MQ-135 MQ135 Air Quality Gas Smoke Detection Sensor Module Compatible with Arduino and Raspberry Pi, Including E-Book! - Image 1](https://m.media-amazon.com/images/I/81wbh1mXmmL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by R***E on 10 July 2021* Wat de sensor precies meet is niet helemaal duidelijk, omdat hij één waarde weergeeft, maar gevoelig is voor meerdere gassen, waaronder CO2. Als grove indicatie is hij echter gevoelig genoeg om verschillen in gasconcentraties te meten. Zo gebruikte ik hem om het fermentatieproces van wijn te volgen, door de sensor boven het waterslot van een gistingsvat te hangen. Eerst de concentratie in de omgeving gemeten, die leverde een waarde op van ongeveer 250ppm. Boven het waterslot schoot de waarde omhoog naar zo'n 450ppm. De waarde daalde geleidelijk naarmate het gistingsproces op zijn eind liep. Ik heb de waarde uitgelezen met een NodeMCU module (een 8266 model) en via een simpel scriptje naar mijn Domoticz smarthome systeem gestuurd. Volledige beschrijving volgt nog wel op mijn website Robothuis, als ik er de tijd voor vind. ### ⭐⭐⭐⭐⭐ Review *by P***B on 24 November 2025* These work weii and within spec. ### ⭐⭐⭐⭐⭐ Review *by K***T on 11 January 2026* Der Sensor reagiert auf verschiedene Gase (Ammoniak (NH₃), Alkohol, Benzol, Rauch, Kohlendioxid (CO₂), Stickoxide (NOx), Rauch etc.), aber er liefert nur einen Analogwert. Folglich kann man nicht genau bestimmen, worauf er im Detail reagiert. Wichtig auch vor der ersten Verwendung die "Einbrennzeit" von 24-48 Stunden zu beachten - die Werte sind ansonsten nicht reproduzierbar. Auch zu beachten: er zieht relativ viel Strom für sein Heizelement - je nachdem sind separate 5V notwendig. Ausserdem: nach dem Einschalten braucht er einige Zeit (etwa 10 Minuten) bis er halbwegs zuverlässige Werte liefert. Er ist also in der Handhabung etwas schwierig, aber dennoch ein guter Sensor um kritische Änderungen der Luftqualität zu überwachen. Recht nützlich : die Library MQUnifiedsensor. Da der Sensor genau tut was er soll (und qualitativ gut verarbeitet scheint), muss ich die volle Punktzahl geben. ## Frequently Bought Together - AZDelivery MQ-135 Air Quality Gas Smoke Detection Sensor Module compatible with Arduino and Raspberry Pi including E-Book! - AZDelivery KY-015 DHT11 DHT-11 3 Pin Digital Temperature and Relative Humidity Sensor Module 3.3V 5V compatible with Arduino Including E-Book! - ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/418035428-mq-135-mq135-air-quality-gas-smoke-detection-sensor-module](https://www.desertcart.co.za/products/418035428-mq-135-mq135-air-quality-gas-smoke-detection-sensor-module) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-04-24*