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How to Build a Portable, Accurate, Low Cost, Open Source Air Particle Counter

instructables.com —
How to Build a Portable, Accurate, Low Cost, Open Source Air Particle Counter: This is the first Instructable in the series: How to Make, Calibrate, and Test a Portable, Accurate, Low Cost, Open Source Air Particle Counter. The second installment, How to Build a Test Chamber for Air Particle Sensors, can be found here. The t…