Part Suggestion on Air Quality Monitor

Other Hardware Sensors
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hello, me and my freinds were thinking about an air quality monitor but we cant find the best cheap parts, our only goal was to find the cheapest parts to make an air quality monitor, but I cant really find a cheap ozone and particular matter sensor, do anybody have a suggestion for a cheap pm2.5,p10 sensor and ozone sensor?

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What does "cheap" mean to you? State your budget.

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This one is compact. The price is also reasonable: ESP8266 Air Quality monitor with Nova PM Sensor SDS011 - Share Project - PCBWay

For Ozone, you can try ### MQ131 OZONE SENSOR

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thanks but there is a problem in the country that I live, mq131 is available in my country but the sensor you sent to me is not available

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you will laugh if i say the budget
and the dollar in here is very expensive

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Those terms are, usually, mutually exclusive!

You need to either give a budget figure and ask what is the closest to your desired targets that can be achieved, or give your minimum targets and ask what is the smallest budget that would meet it.

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i have a maximum budget of 19 dollars(19 dollars is a lot of money in my country) and i spent 4 dollars on the sensors(mq135,dht11) and im looking for cheap pm and ozone sensors

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Unfortunately, PM2.5 measurement is not simple, and requires sophisticated technology. This laser scattering module works reasonably well, and is the cheapest that is actually useful.

The MQ series of sensors don't measure anything, are unreliable and completely uncalibrated. The best they can do is inform that something has changed in the environment.

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thanks!

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Creating an affordable air quality monitor can be a fun and educational project! Here are some suggestions for cheap but reliable sensors you can use to measure particulate matter (PM2.5 and PM10) and ozone levels.

Particulate Matter Sensors (PM2.5, PM10)

  1. PMS5003 by Plantower:
  • Description: This sensor can measure PM1.0, PM2.5, and PM10. It's a popular choice for DIY projects because of its reliability and reasonable cost.
  • Cost: Around $15-20.
  • Pros: Good accuracy, easy to interface with microcontrollers like Arduino and Raspberry Pi.
  1. SDS011 by Nova Fitness:
  • Description: Another good option for measuring PM2.5 and PM10. It uses laser scattering to detect particulate matter.
  • Cost: Approximately $20-25.
  • Pros: Accurate and provides digital output, making it easy to use with various platforms.

Ozone (O3) Sensors

  1. MQ131 by Winsen:
  • Description: This is a low-cost sensor that can detect ozone in the air. It's an electrochemical sensor suitable for environmental monitoring.
  • Cost: Around $10-15.
  • Pros: Affordable, widely available, easy to integrate with Arduino.
  1. ZE25-O3 by Winsen:
  • Description: This sensor is designed specifically for ozone detection. It provides more precise measurements compared to MQ131.
  • Cost: Approximately $30-35.
  • Pros: Better accuracy, suitable for more precise applications.

Additional Components

  • Microcontroller: An Arduino or ESP8266/ESP32 can be used to read sensor data and potentially upload it to a cloud service for remote monitoring.
    • Cost: Around $5-10 for basic models.
  • Power Supply: A USB power adapter or battery pack.
  • Enclosure: A simple plastic or 3D-printed case to house the sensors and microcontroller.

Sample Project Outline

  1. Collect the components:
  • PMS5003 or SDS011 for particulate matter.
  • MQ131 or ZE25-O3 for ozone.
  • Arduino or ESP8266/ESP32.
  • Wires, breadboard, and power supply.
  1. Set up the hardware:
  • Connect the PM sensor to the microcontroller according to the datasheet instructions.
  • Connect the ozone sensor similarly.
  1. Write the code:
  • Use Arduino IDE or another platform to write code that reads data from the sensors.
  • There are many libraries and example codes available online for these sensors.
  1. Test and calibrate:
  • Test your setup in different environments to ensure it’s working correctly.
  • Calibrate the sensors if necessary, using known concentrations or comparing to a reference monitor.
  1. Build the enclosure:
  • Put your components into an enclosure to protect them and make your monitor portable.

Resources

  • Datasheets and sample codes: Check the manufacturer's website or GitHub for libraries and sample codes.
  • Community forums and tutorials: Websites like Instructables, Hackster.io, and Arduino forums have many examples and guides for similar projects.

By choosing these components, you should be able to build a cost-effective air quality monitor. Good luck with your project, and feel free to ask the community if you run into any challenges!

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