SM300D2 7-in-1 PM2.5 + PM10 + Temperature + Humidity + CO2 + eCO2 + TVOC Sensor Tester Detector Module for Air Quality Monitoring
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Overview :
The SM300D2 seven-in-one sensor module is a cost-effective digital serial output sensor module. It uses both RS485 data bus and UART serial port TTL level output modes, collecting CO2, formaldehyde, TVOC, laser PM2.5, PM10, temperature , Humidity in one. It can carry out real-time comprehensive detection of the environment in which it is located, and has good stability.
Features :
??Simultaneous output of carbon dioxide, formaldehyde, TVOC, PM2.5, PM10, temperature, humidity seven sets of data
??High sensitivity and stable data
??At the same time, it adopts two output modes of RS485 bus and UART TTL level, which is convenient for customers to choose and use independently.
??The temperature is accurate to 0.1 ?? and the humidity is accurate to 0.1% RH
??Automatically output these seven sets of monitoring data via RS485 interface every second
??With power supply anti-reverse protection function
Application :
??Hotel room air quality monitoring
??Environmental monitoring of agricultural greenhouses and outdoor breeding sites
??Fresh air ventilation system
??Air purifier, air conditioner
??Air quality monitoring equipment
??Kitchen and bathroom ventilation control system
??Smart home equipment
Specifications :
| Name | resolution | range | accuracy |
| eCO2 | 400ppmï½?000ppm | ±50ppm | |
| eCH2O | 1ug/m3 | 1ugï½?000ug | |
| TVOC | 1ug/m3 | 0ugï½?000ug | |
| PM2.5 | 0.8ug/m3 | 5ugï½?000ug | ±10% |
| PM10 | 5ugï½?000ug | ±10% | |
| Temperature | 0.01??/td> | -40?ƒï?125??/td> | ±0.5??/td> |
| Humidity | 0.04% | 0ï½?00% | ±3%RH |
| Physical interface | ZH1.5-4 | ||
| Output Data | UART-RS485 | ||
| Operating Voltage | 5.0±0.2VDC | ||
| Working current | ??0mA | ||
| Preheat time | 2 min | ||
| Operating temperature | 0?ĕ?50??/td> | ||
| Working humidity | ??5％RH | ||
| Dimensions | 55.8*50*19.5mm（L?W?Hï¼?/td> | ||
| Service life | 5 years (in the air) | ||
Sample Data :
For example, if the value read is 3C 02 08 FC 00 79 01 D7 00 13 00 22 1B 03 30 02 18, the following result is obtained:
| Checksum | B17=unit_8(3Ch+02h+08h+0FCh+00h+79h+01h+D7h+00h+13h+00h+22h+1Bh+03h+30h+02h)=18h |
| CO2 | B3*256+B4=08h*256+0FCh=2300ppm |
| eCO2 | B5*256+B6=00h*256+79h=121ug/m3 |