PM2.5
PM2.5 Sensor P57
Compact automotive-grade PM2.5 sensor designed for space-constrained vehicle systems and reliable long-term in-cabin operation.
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PRODUCT FEATURES
S21 3-in-1 Automotive Sensor
- Integrated 3-in-1 Environmental Sensing: The S21 combines PM2.5, CO2, NTC temperature and humidity acquisition to provide reliable environmental data for intelligent cabin ventilation, recirculation and purification control.
- PM2.5 and CO2 Monitoring: Laser-scattering PM2.5 measurement covers 0–999 µg/m³, while NDIR CO2 detection provides a range of 400–9,999 ppm for coordinated air quality management.
- Temperature and Humidity Acquisition: CMOSens-based measurement covers temperature from −20°C to 85°C and relative humidity from 1%–99% RH, supporting defogging and ventilation control.
- Automotive-Grade LIN Integration: Powered by 9–16 VDC and equipped with LIN communication, the S21 operates from −40°C to 85°C for reliable in-cabin system integration.
TECHNICAL DATA
S21 3-in-1 Automotive Sensor Specifications
Product & Electrical
- Product Name
- S21 3-in-1 Automotive Sensor
- System
- PM2.5 + CO2 + NTC / Humidity
- Supply Voltage
- 9–16 VDC
- Operating Current
- Average: 80 mA @ 13.5 VDC; Peak: 350 mA @ 13.5 VDC
- Operating Environment
- −40°C to 85°C, 5%–95% RH, non-condensing
- Storage Environment
- −40°C to 85°C, 5%–95% RH, non-condensing
- Service Life / Noise
- 30,000 h; ≤25 dB(A) @ 50 cm
PM2.5 & CO2 Detection
- PM2.5 Sensing Principle
- Laser scattering technology
- PM2.5 Range
- 0–999 µg/m³
- PM2.5 Resolution
- 1 µg/m³
- PM2.5 Accuracy
- ≤100 µg/m³: ±15 µg/m³; >100 µg/m³: ±15%
- CO2 Sensing Principle
- NDIR infrared technology
- CO2 Range
- 400–9,999 ppm
- CO2 Resolution
- 1 ppm
- CO2 Accuracy
- ±(50 ppm + 5% of reading)
Temperature & Humidity
- Temperature Sensing Principle
- CMOSens principle
- Temperature Range
- −20°C to 85°C
- Temperature Resolution / Accuracy
- 0.1°C; ±2°C
- Humidity Sensing Principle
- CMOSens principle
- Humidity Range
- 1%–99% RH
- Humidity Resolution / Accuracy
- 0.1% RH; ±5% RH
Mechanical & Communication
- Overall Dimensions
- 88.8 × 65 × 16 mm
- Main Body Dimensions
- 65 × 54 × 28 mm
- Communication
- LIN
Note: Specifications can be confirmed by project. Mounting structure and communication details can be customized for the vehicle platform.
Document: MAXMAC-S21-EN Rev.1
TECHNICAL DATA
S21 Datasheet Downloads
Name
Type
Format
Size
Download
S21 3-in-1 Automotive Sensor DatasheetDatasheetPDF685 KB
PM2.5
Single-Channel PM2.5 Sensor
Automotive-grade single-channel particle detection for accurate, stable air quality data in intelligent cockpit and HVAC systems.
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Dual-Channel PM2.5 Sensor P07
Dual-channel automotive PM2.5 module with standard harness support for full-vehicle integration and cabin purification control.
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Dual-Channel PM2.5 Sensor P0906
Automotive-grade dual-channel architecture for enhanced measurement stability and consistency in demanding air quality applications.
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A54-20 5-in-1 Air Quality Sensor
Complete IAQ sensing platform integrating PM2.5, CO2, TVOC, temperature and humidity for fresh-air units, AHU systems and smart ventilation control.
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A54-21 PM2.5 Sensor
Dedicated particulate sensing node for ventilation cleanliness, filter-performance evaluation and indoor air quality monitoring.
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A54-22 3-in-1 Air Quality Sensor
Efficient PM2.5, temperature and humidity sensing for particulate monitoring, ventilation systems and indoor comfort management.
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A54-23 4-in-1 Air Quality Sensor
Balanced PM2.5, CO2, temperature and humidity sensing for fresh-air units, AHU equipment and commercial HVAC control.
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IAQ
Multi-Sensor Module
Integrated PM, CO2, temperature, humidity and optional AQS/TVOC sensing with customizable interfaces and relay control.
Read more_美图抠图12-12-2025-transparent.webp)
Multi
Dual PM + CO2 + AQS Automotive Air Quality Sensor - P0910
Dual PM sensing supports cabin and outside air comparison, while CO2 and AQS data support intelligent ventilation and recirculation control.
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PM + CO2 + AQS Automotive Air Quality Sensor - P15
Compact multi-in-one sensing for comprehensive cabin air quality monitoring and simplified automotive HVAC integration.
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PM + CO2 + NTC Automotive Air Quality Sensor - S21
Integrated PM, CO2 and NTC temperature sensing for cabin air quality assessment and temperature-linked HVAC control.
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