Air Quality Sensors

Multi-parameter air quality sensor is a cost-effective multi-parameter air quality sensor integrated module, capable of detecting indoor pm2.5 concentration, CO2 concentration, temperature, humidity, formaldehyde concentration, VOC concentration, smoke concentration, special gas concentration and other air indicators of real-time measurement of the value of the performance and stability, compact design, full-featured, rich interface.

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Multi-parameter air quality sensor instruction manual

1.Product Description

　　Communication interface is standard 485 bus, baud rate: 9600.

　　Data bit:8 Stop bit:1 Check bit:None.

2.Product Features

　　-Simultaneous output of PM2.5, PM10, CO2, VOC, formaldehyde and other indicators.

　　Fast response, low power consumption and good long-term stability.

　　Ultra-thin design, more scientific layout of air ducts.

　　-Corrective compensation technology to ensure the accuracy of data in the full temperature range.

　　-Sensors are highly integrated and can be optional.

3.Main applications

　　-Fresh air system, central air conditioning

　　-Pharmaceutical industry, electronics industry, food processing, finishing clean room, precision test area and other industries.

　　-Air quality sensors

　　-Other more demand for air quality detection, testing areas, etc.

4.Technical Specification

Detection parameters	Carbon dioxide, PM2.5, formaldehyde, TVOC, temperature, humidity and other gases (see table below for details)
Signal Output	Standard Modbus RS485
Operating Temperature	-10℃~55℃
Operating humidity	0~95%RH
DC power supply	Standard 24V (supports 10~30V)
Maximum current	150mA
Product Material	ABS flame retardant housing
Installation	Wall-mounted, Ceiling-mounted
Current Impedance Requirements
Supply Voltage	12V	20V	24V
Maximum impedance	125Ω	250Ω	＞500Ω

5. Pin Definition

6. Detection parameters

Detection parameters	range (of scales or measuring equipment)	resolution (of a photo)	accurate	preheating time
dust	0~1000μg/m³	1μg/m³	±10μg/m³±10%	≤10S
pm2.5&pm10	0~1000μg/m³	1μg/m³	±10μg/m³±10%	≤10S
formaldehyde (HCHO)	0~1.5mg/m³	0.001mg/m³	±10μg/m³±10%FS	≤3min
carbon dioxide CO₂	400~5000ppm	1ppm	±50ppm±3%FS	10S(available) 3min(Best)
temp	-40℃~120℃	0.1℃	±0.4@25℃
humidity level	0~100%RH	0.1%RH	±3%RH@60%RH,25℃
atmospheric pressure	30~110Kpa	0.1Kpa	±0.15Kpa@25℃ 75Kpa
illuminance (physics)	0~65535 Lux	1Lux	±7%@25℃
Odor (TVOC)	0~5000μg/m³	1μg/m³	±10%	≤3min
ozone (O₃)	0~10ppm	0.01ppm	±6%FS	≤3min
oxidation	0~25%Vol	0.1%Vol	±3%FS	≤3min
hydrogen sulfide	0~100ppm	1ppm	±3%FS	≤3min
methane CH₄	0~100%LEL	1%LEL	±5%FS	≤3min
carbon monoxide CO	0~1000ppm	0.1ppm	±3%FS	≤3min
nitrogen dioxide (NO₂)	0~20ppm	0.1ppm	±3%FS	≤3min
sulfur dioxide SO₂	0~20ppm	0.1ppm	±3%FS	≤3min
hydrogen (gas)	0~1000ppm	1ppm	±3%FS	≤3min
ammonia (gas)	0~100ppm	1ppm	±10%FS	≤3min
chlorine (chemistry)	0-10ppm	0.1ppm	±3%FS	≤3min
More gases ....	Support extended range		Supports high-precision customization

7. Description of dimensions

8、Cautions

　　1,The PM2.5 sensor on this module is suitable for the detection of dust particles in general indoor environments, the actual use of the environment should be avoided as much as possible in the environment of grease and smoke, dust particles are too large, high humidity environment, etc., such as: kitchens, bathrooms, smoking rooms, outdoor environments and other environments. If used in such environments should be added to the equipment on the corresponding protective measures to avoid viscous particles or large particles into the sensor, the formation of the sensor inside the accumulation and affect the performance of the sensor.

　　2, the module to avoid contact with organic solvents (including silicone and other adhesives), paints, chemicals, oils and high concentrations of gas.

　　3, the module can not be completely encapsulated with resin materials, and can not be submerged in an oxygen-free environment, otherwise it will damage the performance of the sensor.

　　4, the module can not be applied for a long time in the environment containing corrosive gases, corrosive gases will damage the sensor.

　　5, the module for the first time on the use of power needs to be warmed up for more than 3 minutes.

　　6、Do not use the module in the system involving personal safety.

　　7,If the sensor is to be placed in a small space, the space should be well ventilated.

　　8、Do not install the module in the strong convection air environment.

　　9, do not place the module in a long time in high concentration of organic gases, long-term placement will lead to sensor zero drift, slow recovery.

　　10, prohibit the use of hot melt adhesive or curing temperature higher than 80 ℃ sealant package module.

　　11, the sensor should be away from heat sources, and avoid direct sunlight or other thermal radiation.

　　12, the module should not be subjected to excessive impact or vibration.