Product description: Air Quality Combo - indoor air quality sensor - SCD41 + SEN55 - Qwiic - SparkFun SEN-25200
Air Quality Combo manufactured by SparkFun is a multifunctional sensor designed to measure indoor air quality. The product combines two sensors SCD41 and SEN55 , thanks to which it is possible to measure CO2, volatile organic compounds (VOC), particulate matter (PM1 / PM2.5 / PM4 / PM10), temperature and relative humidity. It uses the I2C bus to communicate with the connected microcontroller, and the physical connection is made via pass-through connectors or Qwiic connectors. Air Quality Combo uses the built-in buck/boost circuit to amplify the 3.3 V voltage from the Qwiic connector or the 3.3 V PTH pin to 5 V.
Also check the user guide prepared by the manufacturer.
Air Quality Combo - indoor air quality sensor - SCD41 + SEN55 - Qwiic - SparkFun SEN-25200 .
SEN55 sensor.
SCD41 sensor
It uses the NDIR PASens photoacoustic measurement system from Sensirion. It also allows for measuring ambient pressure. It is powered by a voltage from 2.4 V to 5.5 V. The SCD41 has a built-in automatic self-calibration system to maintain continuous measurement accuracy.
SEN55 sensor
It is used to monitor air quality. It is powered by a voltage of 4.5 V to 5.5 V (5 V recommended). SEN55 allows you to measure particulate matter in the following sizes: PM1, PM2.5, PM4 and PM10 in concentrations from 0 to 1000 µg/m 3 . It also detects VOC and NO x indicators in the range of 1 to 500 index points.
Main features of the sensor
- It is a combination of two sensors SCD41 and SEN55 , enabling the measurement of CO2, volatile organic compounds (VOC), particulate matter (PM1.0 / PM2.5 / PM4 / PM10), temperature and relative humidity
- Uses I2C bus to communicate with minicomputer
- It is equipped with two Qwiic connectors , which allow for quick connection to boards such as Arduino without the need to solder the leads.
- Equipped with a red LED to indicate power supply
- Uses built-in buck/boost circuitry to boost 3.3V from Qwiic connector or 3.3V PTH pin to 5V
The SCD41 sensor should be fully calibrated by taking continuous measurements for one hour per day for seven days to obtain optimal results.
Connecting the sensor to a minicomputer.
SCD41 sensor.
SCD41 Sensor Specifications
- Communication interface: I2C
- I2C Address: 0x62
- Supply voltage: 2.4 V to 5.5 V (3.3 V recommended)
- Power consumption:
- Normal mode:
- Maximum: 205mA / 3.3V
- Normal mode: 18mA/3.3V
- Low Power Mode: 3.5mA/3.3V
- Single measurement: 0.5 mA / 3.3 V
- Normal mode:
- Photoacoustic measurement system: PASens technology by Sensirion
- Integrated temperature and humidity sensor: CMOSens technology by Sensirion
- CO2 Output Range: 0 to 40000 ppm
- CO2 measurement accuracy: ± (40 ppm + 5% of reading) for the range from 400 ppm to 5000 ppm
- Humidity measurement range: 0% to 100% RH
- Humidity measurement accuracy: ±9% RH (full range)
- Temperature measurement range: -10°C to 60°C
- Temperature measurement accuracy: ±1.5°C (full range)
- Sensor dimensions: 10.1 x 10.1 x 6.5 mm
SEN55 sensor specification
- I2C address: 0x69
- Supply voltage: 4.5 V to 5.5 V
- Average supply current: 63 mA
- Maximum supply current: 110 mA
- Particulate Measurement:
- Mass concentration precision: ± 10%
- Mass concentration range: 0 to 1000 μg/m³
- Lifespan: > 10 years
- Particle size range: PM1, PM2.5, PM4 and PM10
- Temperature measurement:
- Temperature measurement accuracy: 0.45°C
- Temperature measurement range: 15°C to 30°C
- Response time (63%): < 60 s
- Humidity measurement:
- Relative humidity measurement accuracy: 4.5% RH
- Relative air humidity measurement range: 30% to 70% RH
- Response time (63%): 20 sec
- Measurement of volatile organic compounds (VOC):
- VOC Index Output: 0 to 500 Index Points
- NO x indicator output: 0 to 500 index points
- Response time (63%): < 10 sec
- Variability between devices: ±15%
- Detection limit: < 0.05 ppm ethanol equivalent or < 10% of the concentration set point, whichever is greater
- Switch-on time: 1 h
- Humidity compensation in integrated circuit
- Sensor dimensions: 52.3 x 43.3 x 22.3 m
SEN55 sensor.
Air Quality Combo - SparkFun SEN-25200.
Air Quality Combo Sensor Technical Specifications
- Producer: SparkFun
- Type: Air Quality Sensor
- Built-in sensors: SCD41, SEN55
- Measured values: CO2, volatile organic compounds (VOC), particulate matter (PM1.0 / PM2.5 / PM4 / PM10), temperature and relative humidity
- Communication interface: I2C bus
- 2 Qwiic connectors
- Soldering pads
- AP3012 - 500 mA / 29 V 1.5 MHz - DC/DC Step-up Converter
- Dimensions: 82.55 x 44.45 mm
