Multi-Parameter Air Quality Sensors (8-in-1 / 10-in-1) for PM2.5, CO2, and TVOC Monitoring

An 8-in-1 or 10-in-1 Air Quality Sensor is a multi-parameter device that detects various atmospheric variables in a single unit. It monitors PM2.5, PM10, CO2, TVOC, Formaldehyde (HCHO), temperature, relative humidity, and barometric pressure—making it ideal for industrial facilities, smart buildings, and automated agriculture.

Air Quality: An Invisible Threat Impacting Daily Operations
As air pollution grows into a major occupational health concern, continuous monitoring in indoor environments, factories, farms, and offices has become essential. Particulate matter (PM2.5) bypasses respiratory defenses, CO2 buildup reduces workplace focus and productivity, and Total Volatile Organic Compounds (TVOCs) emit hazardous fumes from paints and construction materials.

Historically, tracking these required multiple separate sensors, leading to high hardware costs, complex wiring, and demanding maintenance routines. All-in-One (8-in-1 / 10-in-1) Air Quality Sensors eliminate these hurdles completely.

Understanding 8-in-1 vs. 10-in-1 Air Quality Sensors

Multi-parameter air quality sensors integrate several sensing elements into a single enclosure. They are categorized into two primary models:

8-in-1 Model Parameters

• PM2.5: Particulate matter <= 2.5 um. Poses severe respiratory risks.
• PM10: Particulate matter <= 10 um. Causes allergies and irritation.
• CO2: Carbon Dioxide (ppm). Serves as a key indicator of ventilation efficiency.
• TVOC: Total Volatile Organic Compounds (ppb). Sourced from paints, adhesives, and building materials.
• HCHO: Formaldehyde gas. A toxic carcinogen from furniture glues and coatings.
• Temperature: °C or °F. Affects comfort levels and core sensor accuracy.
• Relative Humidity (RH%): Impacts respiratory health and mold proliferation.
• Barometric Pressure: hPa / Pa. Essential for Building Automation and HVAC balancing.

10-in-1 Model Additional Parameters

Depending on the specific variant, 10-in-1 models add two extra metrics. They can measure toxic Carbon Monoxide (CO) and Ozone (O3) for combustion environments and surgical units, or Light Intensity (Lux) and Sound Level (dB) for classrooms and commercial buildings.

Why Choose an All-in-One Sensor?

Cost & Space Savings: Replacing 8 to 10 distinct devices with a single unit slashes hardware costs, reduces physical space requirements, and minimizes Modbus/IO wiring points.

Standardized Protocol Connectivity: These multi-parameter sensors inherently support industrial protocols:

• Modbus RTU (RS485): Immediate connection to PLCs and data loggers.
• Modbus TCP (Ethernet): Seamless integration into SCADA and MES architectures.
• MQTT / HTTP: Direct data streams to IoT platforms like Node-RED, E-Power Connect, and Haiwell Cloud.
• 4–20 mA / 0–10 V: Backward compatibility with legacy analog PLC inputs. At E-Power Service, we specialize in full-scale integration of these sensors with LicOS PLCs, Haiwell HMIs, CODESYS engines, and Node-RED IoT dashboards.

Simplified PLC Programming: Because the data is stored within sequential Modbus registers, all 8–10 parameters can be retrieved in a single read cycle. This reduces Node ID management, simplifying your CODESYS function blocks significantly.

Comprehensive Data for Analytics: Consolidating multi-dimensional data into one stream empowers smart systems to make precise automated adjustments (e.g., HVAC modulation, fan triggers, Line/Telegram emergency alerts).

Common Industrial & Smart Use Cases

• Industrial Facilities: Tracks PM2.5, TVOC, and CO to meet workplace safety standards (ISO 45001) via Modbus RTU communication with LicOS or CODESYS PLCs.
• Smart Farms & Greenhouses: Regulates CO2 enrichment for optimized crop growth while managing misting systems via Node-RED on E-Power’s EM300 FlowPLC.
• Smart Buildings & HVAC: Drives real-time demand-controlled ventilation based on active CO2 metrics to achieve energy efficiency compliant with ASHRAE 62.1.
• Aquaculture Facilities: Manages indoor air quality in Recirculating Aquaculture Systems (RAS) rooms, logging values to Google Sheets or Telegram.
• Hospitals & Medical Cleanrooms: Audits TVOC, HCHO, and PM2.5 levels to verify sterile conditions according to WHO guidelines.

Available via E-Power Service

CWT-SAQ-8-CH (Indoor 8-in-1 Sensor): A compact, ceiling/wall-mounted unit featuring a 5VDC power input, RS485 Modbus RTU output, and an IP20 rating (Diameter 90 x H30 mm). Perfect for offices, classrooms, and automated greenhouses.

Summary

Multi-parameter 8-in-1 and 10-in-1 Air Quality Sensors offer a highly cost-effective path to Industry 4.0 data acquisition. By consolidating complex parameters like PM2.5, CO2, and TVOC into standard Modbus/IoT nodes, they simplify system integration. Contact E-Power Service for tailored sensor solutions on your next IoT deployment.