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
A54-23 4-in-1 Air Quality Sensor
- Integrated 4-in-1 Air Quality Monitoring: The A54-23 combines PM2.5, CO2, temperature and humidity sensing in one compact device, providing essential environmental data for your indoor air quality and ventilation control systems.
- Wide Measurement Ranges: Laser-scattering PM2.5 sensing provides a range of 0–999 µg/m³ with 1 µg/m³ resolution, while NDIR CO2 detection covers 400–9,999 ppm. The sensor also measures temperature from −20°C to 85°C, and relative humidity from 1% to 99% RH.
- Flexible Communication Interfaces: The A54-23 supports RS485 and UART communication interfaces, with expandable Modbus protocol support. Powered by 12–24 VDC, it provides stable data transmission for system integration.
- Compact and Durable HVAC Design: Measuring only 66.4 × 51.4 × 19 mm, the sensor features a flame-retardant PC+ABS V0 housing and a low average power consumption of ≤1 W. Its compact construction simplifies installation in space-constrained commercial and industrial air quality equipment.
TECHNICAL DATA
A54-23 4-in-1 Air Quality Sensor Specifications
Product & Electrical
- Product Name
- A54-23 4-in-1 Air Quality Sensor
- Model
- A5423
- Functions
- PM2.5 + CO2 + Temperature + Humidity
- Operating Voltage
- 12–24 VDC
- Operating Current
- Average: 35 ± 5 mA @ 12 VDC; Peak: <150 mA (10 ms)
- Standby Power
- ≤1 W
- Power Consumption
- ≤3 W
PM2.5 Detection
- Sensing Principle
- Laser scattering technology
- Measurement Range
- 0–999 µg/m³
- Resolution
- 1 µg/m³
- PM2.5 Accuracy
- ≤100 µg/m³: ±15 µg/m³; >100 µg/m³: ±15%
CO2 Detection
- CO2 Sensing Principle
- NDIR infrared technology
- CO2 Measurement Range
- 400–9,999 ppm
- CO2 Resolution
- 1 ppm
- CO2 Accuracy
- ±(50 ppm + 5% of reading)
Temperature & Humidity
- Temperature Sensing Principle
- CMOSens®
- Temperature Measurement Range
- −20°C to 85°C
- Temperature Resolution
- 0.1°C
- Temperature Accuracy
- ±2°C
- Humidity Sensing Principle
- CMOSens®
- Humidity Measurement Range
- 1–99% RH
- Humidity Resolution
- 0.1% RH
- Humidity Accuracy
- ±5% RH
Mechanical & Communication
- Dimensions
- 66.4 × 51.4 × 19 mm
- Housing Material
- PC+ABS, V0 flame-retardant
- Communication
- RS485 and UART; expandable Modbus protocol
- Interface
- 4-pin socket
- Physical Connector
- GH1.25-4P locking connector
- Operating Environment
- −10°C to 50°C, 0–95% RH, non-condensing
- Storage Environment
- −20°C to 65°C, 0–99% RH, non-condensing
Note: The matching GH1.25-4P locking terminal cable should be prepared by the user for connection.
Document: MAXMAC-A5423-EN Rev.1
TECHNICAL DATA
A54-23 Datasheet Downloads
Name
Type
Format
Size
Download
A54-23 4-in-1 Air Quality Sensor DatasheetDatasheetPDF2.9 MB
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.
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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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