All in one air quality sensor module (CO2+VOC+HCHO+Temperature+Humidity）
Built-in Temperature compensation and external Humidity compensation available
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For manual, please visit our new website.
https://www.rainbowsensor.cn
For each sensor module,
1. Built-in Temperature compensation and external Humidity compensation available.
2. Another version of sensor module with 5V voltage.3. We offer full PCB design and manufacturing services.
5 in 1 integrated air quality sensor module (CO2+VOC+HCHO+Temperature+Humidity）
PN: RK14Z
The multi in one air quality sensor module based on MEMS gas sensors is used to test the ambient temperature and humidity and the content of harmful substances in the air, and provide the ambient temperature and humidity and the predicted harmfulnessThe relative equivalent concentration value of the substance, and the test data is communicated through I2C or UART interface.The surface of the MEMS gas sensor can be protected by a filter membrane,The air quality sensor module can be assembled with patch or cable as required.
Feature
Comprehensive and reliable assessment of temperature, humidity and air quality
Built-in temperature compensation and humidity compensation algorithm
High sensitivity and fast response
Very low power consumption (< 66mW)
Small size (17.8mm×15.2mm×2.5mm)
Intelligent automatic baseline calibration, reference value storage
The reference value can be reset
Robust design, excellent long-term stability
Highly flexible assembly method and communication interfaceApplication
● Hotel room air quality monitoring
● Gas detector
● Fresh air ventilation system
● Air purifier, air conditioner
● Air quality monitoring equipment
● Kitchen and bathroom ventilation control system
● Smart home equipment
● Environmental monitoring of agricultural greenhouses and outdoor breeding places
Parameter
Size:
Remarks: IIC interface needs external 4.7kΩ pull-up resistorPower requirements
Item
Specification
Voltage
3.3V±0.1V, max. 20mV ripple
Power consumption
Max. 66mW @3.3VDC (20mA)
Test interval
1 Sec.
Communication
UART Series port
Item
Specification
Baud rate
9600 bits/s
Data bit
8
Parity bit
None
Stop bit
1
Protocol
1.Master send OxFF 52 01 01 AC to reset baseline to current value.
2.Master send OxFF 67 01 01 97to automatic upload data packet once per Sec.. Resend it again to restore to query mode.
3.Master send OxFF 61 02 01 9C in query mode to acquire 13 bytes data packet.
12C bus
Item
Specification
Frequency
Standard Mode: 100kbits/s
Module address
0xA2 (7 bit address mode, shift left by 0x51)
Module output
Acquire 13 bytes data packet by do read operation
Benchmark reset
Reset baseline to current value by do write OxFF 52 01 01 AC operation
Data Packet
Byte
Name
Description
0
Packet Head
0xFF
1-2
eCO2 (ppm)
Data[1]*28+Data[2]
3
Status
0x00: OK
0x01: Heating
0x02: Error
4-5
Temperature(℃)
(Date[4]*28+Data[5]
-669)/10
6-7
Humidity(%RH)
(Date[6]*28+Data[7]
-125)/10
8-9
TVOC(ug/m³)
Data[8]*28+Data[9]
10-11
HCHO(ug/m³)
Data[10]*28+Data[11]
12
Check Code
~(Sum(D[1]:D[11]))+1
(Take the last 8 bits)
Environmental Specifications
Item
Specification
Working temperature
-10 ~ +60 ℃
Working humidity
5 ~95% RH, non-condensing
Storage temperature
-40 ~ 85 ℃
Storage humidity
5 ~95% RH, non-condensing
Attentions
Please read carefully and abide by the following terms to avoid product data errors and prevent product damage.
1.The air quality sensor module must be reflow soldered in a neutral atmosphere to avoid soldering flux vapor. When performing reflow soldering, the soldering furnace should have sufficient flow of clean air to keep the soldering furnace air clean and prevent the soldering atmosphere from polluting the sensitive layer of the product. The recommended maximum soldering temperature should not exceed 260℃. The recommended manual soldering condition is the highest temperature of 350℃ within 5 seconds.
2. Avoid exposing the product to high-concentration organic solvent vapor and organic silicon vapor to prevent poisoning of sensitive materials
3. The MEMS gas sensor should be placed in the space protected by the filter membrane to prevent the influence of water and dust.
4. Each time the power is turned on, the resistance value of the sensitive electrode of the MEMS gas sensor will have a continuous increase process. The length of this process depends on the working history of the sensor. The longer the power-off time, the longer the process will take; In order to ensure the accuracy of the measurement results after a long-term power failure, this product should be used for measurement at least 60 minutes after power-on.
5. When handling the product, it is recommended to use ESD protection equipment.
Remarks: IIC interface needs external 4.7kΩ pull-up resistor
