SISCO outdoor air quality sensor integrates PM1.0, PM2.5, and PM10 monitoring with automatic calibration for consistent data reliability. The weather-resistant enclosure protects internal components from moisture and dust ingress. This PM2.5 sensor supports RS485 Modbus, 4-20mA, 0-5V, and 0-10V outputs to accommodate various data acquisition systems.
Multiple Signal Outputs for Flexible System Integration
- Supports RS485 (Modbus-RTU) digital output for direct connection to PLCs, with up to 254 devices on a single bus.
- Provides 4-20mA current loop output for long-distance transmission with strong anti-interference capability.
- Delivers 0-5V and 0-10V voltage outputs compatible with analog input modules (0-10V requires a 24V power supply).
- Output signals correspond linearly to PM concentration, allowing direct reading without additional programming.
Laser Anti-Attenuation and Automatic Calibration for Long-Term Stability
- Laser anti-attenuation technology suppresses laser power decay, ensuring consistent accuracy over years of continuous operation.
- Dual-frequency data acquisition combined with a Mie scattering algorithm improves particle size classification accuracy.
- Automatic calibration runs periodically without manual intervention, maintaining data consistency within ±10%.
- Calibration registers are user-accessible via Modbus for on-site offset correction when comparing with reference instruments.
Applications
SISCO outdoor air quality sensor is widely used in environmental monitoring stations, construction site dust control, industrial plant emissions tracking, and urban roadside air quality networks. It is also deployed in warehouse ventilation management, agricultural greenhouse environmental control, and HVAC system optimization for commercial buildings.
Construction Dust Control
Environmental Monitoring
Industrial Plant Emissions
Road Air Quality Monitoring
| Model | SISCO-AQS-3002-PM |
| Power Supply | 10~30V DC |
| Power Consumption | 0.5W |
| PM2.5 Measurement Range | 0~1000μg/m3 |
| PM10 Measurement Range | 0~1000μg/m3 |
| PM1.0 Measurement Range | 0~1000μg/m3 |
| Temperature Measurement Range | -40~+80℃ |
| Humidity Measurement Range | 0%RH~100%RH |
| Operating Humidity | 0% RH~95% RH (non-condensing) |
| Transmitter Circuit Operating Environment | -20℃~+60℃ |
| Output Signal | RS485, 4-20mA, 0-5V, 0-10V optional (4G/wifi contact customer service) |
| Communication Interface | RS485 (Modbus) Protocol |
| Baud Rate | 2400, 4800, 9600 (default) |
| Data Length | 8 bits |
| Parity Check Mode | None |
| Stop Bits | 1 |
| Default Modbus Address | 1 |
| Parameter Configuration | Configured via provided software through RS485 interface |
| Resolution | PM2.5/PM10/PM1.0: 1 μg/m3 Temperature: 0.1℃ Humidity: 0.1% RH |
| Accuracy (default) | PM2.5: ±3%FS(@0~100μg/m3, 25℃, 50%RH) Temperature: ±0.5℃(25℃) Humidity: ±3%RH(60%RH, 25℃) |
Dimensions (unit: mm)
Q1: What is the difference between PM1.0, PM2.5, and PM10 in this outdoor air quality sensor?
A1: This outdoor air quality sensor measures particulate matter by particle size. PM1.0 detects particles < 1.0 μm (such as fine dust and smoke), PM2.5 detects particles < 2.5 μm (including smog and combustion particles), and PM10 detects particles < 10 μm (such as pollen and coarse dust). All three are measured simultaneously and output as independent values, giving you a complete picture of airborne particulates.
Q2: What output signals does this outdoor air quality sensor support?
A2: This outdoor air quality sensor supports RS485 (ModBus-RTU), 4-20mA, 0-5V and 0-10V outputs. RS485 is ideal for digital communication and bus networking with up to 254 devices. 4-20mA is suitable for long-distance transmission with strong anti-interference capability. 0-5V and 0-10V are compatible with standard analog input modules. All outputs are linearly proportional to PM concentration for easy data reading.
Q3: How accurate is this PM2.5 sensor and how does it maintain long-term stability?
A3: This PM2.5 sensor achieves ±3% FS accuracy (@0~100μg/m3, 25°C, 50%RH). Long-term stability is ensured by laser anti-attenuation technology, which suppresses laser power decay over time, and an automatic calibration system that runs periodically without manual intervention, maintaining data consistency within ±10%. Calibration registers are also user-accessible via Modbus for field adjustment.
Tips: What is the laser scattering principle for this outdoor air quality sensor?
- A laser beam is projected into the air sampling chamber. When suspended particles pass through the beam, they scatter the light in all directions.
- The scattered light is collected at a specific angle by a photodetector. The intensity of the scattered light is proportional to the particle size.
- The microprocessor analyzes the scattered light intensity curve over time. Using algorithms based on Mie scattering theory, it calculates both the equivalent particle diameter and the number of particles per unit volume.
- The sensor converts the particle count data into mass concentration values (in μg/m3) for PM1.0, PM2.5, and PM10. The pump-driven sampling ensures continuous airflow through the chamber, enabling rapid response times of ≤90 seconds.
Thank you for buying industrial test and measurement equipment on SISCO.com, all products sold by SISCO and the partner cover a 12 months warranty, effective from the date of receiving the products.
What is covered?
SISCO is responsible for providing free spare parts, and free technical support to assist the customer to repair the defective products until the problem is solved.
What is not covered?
- Product purchased from anyone other than a SISCO store or a SISCO authorized reseller.
- Expendable parts.
- Routine cleaning or normal cosmetic and mechanical wear.
- Damage from misuse, abuse or neglect.
- Damage from use of parts other than SISCO approved.
- Damage from use outside the product’s usage or storage parameters.
- Damage from use of parts not sold by SISCO.
- Damage from modification or incorporation into other products.
- Damage from repair or replacement of warranted parts by a service provider other than a SISCO authorized service provider.
- Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
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