PM2.5 Air Quality Sensor

Gravity: PM2.5 Air Quality Sensor SKU:SEN0460 Brand:DFRobot $39.90

INTRODUCTION

As the most basic part of life, air is attracting more and more attention, for example, the most common PM2.5, PM1.0, PM10, etc. Keeping an eye on the quality of the air we breath is becoming quite important.

DFRobot brings you this Air Quality Sensor that can measure particulate matter like PM2.5, PM1.0, PM10.

With easy-to-use Gravity interface, the air quality sensor works well with most main-controllers. And we provide you with relevant sample codes to help you quickly build up air quality monitoring projects.

Based on the principle of laser scattering, the PM2.5 air quality sensor employs a digital universal particle sensor that can continuously collect and calculate the number of suspended particles of different sizes in the air per unit volume, which is particle concentration distribution, and then convert to concentration and output via I2C interface.

The sensor can be embedded in various instruments and meters or environmental improvement equipment related to the concentration of suspended particulate matter in the air to provide timely and accurate concentration data.

It is typically suitable for smoking rooms, kitchens, hot springs, bathrooms and other environments.

FEATURES

Laser scattering principle, accurate measurement
Zero false alarm rate
Real-time response and support continuous acquisition
Minimum recognizable particle size 0.3µm
Six-sided all-round shielding, stronger anti-interference
Ultra-thin design, only 12mm, suitable for portable devices

SPECIFICATION

Working Voltage: 3.3V~5V
Maximum Working Current: 100mA
Standby Current: ≤2mA
Data Interface Level: L＜0.8V, H>2.7V, maximum voltage level 3.3V
Particle Measurement Range: 0.3 ~ 1.0μm; 1.0 ~ 2.5μm; 2.5 ~ 10μm
Particle Counting Efficiency: 50% @ 0.3μm 98% @ ≥0.5μm
Effective Range of Particle Mass Concentration (PM2.5 standard value): 0~500ug/m³
Maximum Range of Particle Mass Concentration (PM2.5 standard value): ≥1000ug/m³
Resolution of Particle Mass Concentration: 1ug/m³
Consistency of Particle Mass Concentration (PM2.5 standard value): 1. ± 10% @100 ~ 500 ug/m³; 2. ±10 ug/m³@0 ~ 100 ug/m³
Standard Volume: 0.1 L
Single Response Time: ＜1s
Comprehensive Response Time: ≤10s
Working Temperature Range: -10~+60℃
Working Humidity Range: 0~95%% (non-condensing)
Mean Time Between Failures: ≥5 years
Product Size: 67 mm 40 mm 14 mm / 2.641.57 0.55 inches

Installation Note

The metal shell is connected to the internal power ground. Be careful not to short-circuit it with other external board circuit or chassis shell.
The best installation method is to connect the plane with air inlet and outlet holes with the user’s machine’s inner wall (where there are gas holes connect with the outside). If this method is impossible to use, make sure there is no obstacles within 2cm of the air outlets, and there should be a structure between the air inlet and the air outlet to isolate the airflow and avoid the airflow from the air outlet to the air inlet directly inside the user machine.
The vent opening on the inner wall of the user machine for the air inlet should not be smaller than the size of the air inlet.
When applied to purifier products, try to avoid placing the sensor directly in the air duct of the purifier. If it is unavoidable, set up a separate structural space and place the sensor in it to isolate it from the air duct of the purifier.
When used with purifiers or fixed detection equipment, the sensor position should be more than 20cm above the ground. Otherwise, it may be contaminated by large dust particles or even flocs near the ground, causing the fan to wind and block rotation.
When the sensor is applied to outdoor fixed equipment, the protection against sandstorms, rain and snow, and willow catkins, etc. should be completed by the equipment.
The sensor should be an integral component, the user should not disassemble it, including the metal shielding shell, to prevent irreversible damage.
The sensor can be fixed with M3 tapping screws.
This sensor data ensures the consistency between the factory individuals, and does not use third-party testing equipment or data as a comparison standard. If the user wants the final measurement result to be consistent with a third-party testing equipment, the user can perform data fitting based on the actual collected results.
This sensor is suitable for ordinary indoor environment. If the user equipment is used in the following actual environments, corresponding protective measures should be added to the sensor, otherwise the data consistency may decrease due to excessive dust, oil, and water ingress:
- Places where more than 50% of the time, the dust concentration is greater than 300mg/m^3 or more than 20% of the time, the dust concentration is greater than 500mg/m^3, for example a smoking room.
- Oily fume environment, such as kitchen
- High vapour environment, such as hot spring, bathroom
- Outdoor

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