Air Quality Monitoring System

CS-AQMS1

Air Quality Monitoring System

CS-AQMS1 is a cloud-based air quality monitoring system designed to measure key air quality parameters, including particulate matter (PM), pollutant gases, temperature, relative humidity, and barometric pressure. A standout feature of this system is its customizability; users can select up to three gas sensors of their choice, a one-of-a-kind feature in the market. Built robustly, the CS-AQMS1 is adept for both indoor and outdoor environments, making it a perfect fit for research and industrial applications. This system combines precision, versatility, and durability, offering a comprehensive solution for air quality monitoring.

  • Key Features​
  • Specification
  • Product Details
  • Downloads
  • Advanced Monitoring: Dive deep into air quality insights! Effortlessly measure particulates of sizes 1, 2.5, 4, and 10 microns alongside a customizable range of air pollutant gases, including CO, CO2, NOx, NO2, VOC, TVOC, H2S, HCHO, O3, and SO2. But that’s not all. Keep tabs on the air temperature, relative humidity, and barometric pressure for an all-encompassing environmental overview.
  • Reliable Performance: Designed for resilience, the CS-AQMS1 guarantees unwavering functionality in temperatures ranging from a chilly -20 to a scorching 50°C.
  • Precision and Ease: Trust in the factory calibration that ensures you're starting with pinpoint accuracy. With the dedicated API, system integration becomes a breeze. The intuitive CredoSense cloud dashboard simplifies data visualization while the built-in self-diagnostics ensures your readings are consistently top-notch.
  • Quick Deployment: Ready to roll right out of the box! This robust system is primed for setup in under 15 minutes. Whether you're monitoring the air inside your living space or tracking pollutants in an industrial setting, the CS-AQMS1 is your go-to for both indoor and outdoor scenarios.
  • Seamless Connectivity: Stay connected, always! The system boasts of 4G LTE and WiFi options—just slot in a SIM card for uninterrupted cellular connectivity. Access your air quality data anytime, anywhere, with cloud availability (subscription-based) and an in-built microSD card.
  • Unmatched Value: Redefining cost-efficiency, the feature-packed CS-AQMS1 presents unbeatable value. Whether you're a research professional or an environmental enthusiast, this system promises to deliver a revolutionary air quality monitoring experience.

Unlock a new world of environmental insights with the CS-AQMS1, where innovation meets accuracy.

Particulate matter measurements:

  • Range: 0 to 1000 ug/m3
  • Mass concentration measurements of PM1, PM2.5, PM4, PM10
  • Measurement resolution: 1 ug/m3
  • Sensor lifetime: 10 years
  • Mass concentration accuracy:
    • PM1 and PM2.5: 
      • 5% (0–100 μg/m3)
      • 10% (100–1000 μg/m3)
    • PM4 and PM10: 25% (0–1000 μg/m3)
  • Operating range:
    • Temperature : -20 to 50°C
    • Relative Humidity: 0 to 99% ( non-condensing)
    • Barometric Pressure: 300 to 1200 mbar
  • Startup time: < 60s
  • Response time: < 30s
  • Storage:
    • Temperature: -40 to 70°C
    • Relative humidity: 0 to 80% (non-condensing)
  • Acoustic emissions level: 24 dBA at 0.2m

Temperature, relative humidity, and barometric pressure measurements:

  • Temperature: 
    • Measurement range: -20 to 65°C
    • Typical accuracy: 0.2°C, max. 0.4°C (0 to 65°C)
    • Typical accuracy: 0.4°C, max. 0.7°C (-20°C to 0°C)
    • Resolution: 0.01°C
    • Response time: 2s
  • Relative humidity: 
    • Measurement range: 0 to 99% (non-condensing)
    • Typical accuracy: 2%; max. 3.5% (10 to 90%)
    • Resolution: 0.01%
    • Response time: 4s
  • Barometric pressure:
    • Measurement range: 300 to 1200 mbar (30 to 120 kPa)
    • Absolute accuracy: 100 Pa (1 mbar) (at 0 to 65°C)
    • Precision: 0.2 Pa (RMS) in high precision mode
    • Resolution: 0.01mbar
    • Response time: 1s

Data logging and network connectivity:

  • Maximum logging rate: Every minute (can change depending on gas sensor’s response time)
  • Storage options: Comes with a 32GB microSD card and cloud storage.
  • Backup feature: Internal data backup during cloud connectivity interruptions.
  • Internet Access:
    • Cellular: LTE SIM supported. ( User needs to provide the SIM card.)
    • WiFi: Requires user-provided access. Note: AQMS1 doesn't support public Wi-Fi with browser logins.
  • Always logging: AQMS1 saves data to the SD card, even offline. No internet? No problem!
  • CredoSense cloud: Use for data access, system updates, and firmware tweaks.
  • Alert System: Warnings displayed in cloud data for SD or cloud upload issues.
  • User-Friendly API: Seamlessly blend CS-AQMS1 into your systems, no hardware fuss.

Power supply and enclosure

  • Power supply: 5V @3A DC (AC/DC adapter included)
  • Weatherproof enclosure: Protection from rain and sunlight exposure 

Gas Sensors:

  • Carbon Monoxide (CO): 
    • Measurement range: 0-1000 ppm.
    • Maximum overload: 1000 ppm.
    • Accuracy: ≤ 2 ppm.
    • Response time: < 30s.
    • Repeatability: < 1%.
    • Lower detectable limit (LDL): ≤ 2 ppm.
    • Resolution: 0.1 ppm.
    • Expected lifetime: > 5 years in air.
    • Temperature range: -40°C to 55°C.
    • Pressure range: 800 to 1200 hPA.
    • Operating humidity range: 15–95%.
    • Cross sensitivity: Hydrogen (20 ppm in 100 ppm concentration).
  • Carbon Dioxide (CO2): 
    • Range: 400–5000 ppm.
    • Accuracy: ±(50 ppm + 2.5% of reading): 400–1000 ppm; ±(50 ppm + 3% of reading): 1001–2000 ppm; ±(40 ppm + 5% of reading): 2001–5000 ppm.
    • Repeatability: ±10 ppm.
    • Response time: 60 s.
    • Additional accuracy drift after five years: ± (5 ppm + 0.5% of reading)
  • Ozone (O3):
    • Measurement range: 0–5 ppm.
    • Maximum overload: 10 ppm.
    • Accuracy: 0.05 ppm.
    • Response time: < 60s
    • Repeatability: < 2%.
    • Lower detectable limit (LDL): 0.05 ppm.
    • Resolution: 0.01 ppm.
    • Expected lifetime: > 24 months.
    • Long-term drift: < 1% per month.
    • Temperature range: -20°C to 40°C.
    • Pressure range: 800 to 1200 hPA.
    • Operating humidity range: 15–95%.
    • Cross sensitivity: Sulfur dioxide (1 ppm in 5 ppm concentration).
  • Sulfur Dioxide (SO2):
    • Measurement range: 0–50 ppm.
    • Maximum overload: 100 ppm.
    • Accuracy: 1 ppm.
    • Response time: < 60s
    • Repeatability: < 1%.
    • Lower detectable limit (LDL): 1 ppm.
    • Resolution: 0.1 ppm.
    • Expected lifetime: > 3 years in air.
    • Long-term drift: < 1% per month.
    • Temperature range: -40°C to +55°C.
    • Pressure range: 800 to 1200 hPA.
    • Operating humidity range: 15–95%.
    • Cross sensitivity: Chlorine (-1 ppm in 10 ppm concentration); Nitric Oxide (< -3ppm in 25 ppm concentration); Hydrogen Cyanide (< 5ppm in 10 ppm concentration )
  • Formaldehyde (CH2O):
    • Measurement range: 0–5 ppm.
    • Maximum overload: 10 ppm.
    • Accuracy: ≤ 0.05 ppm.
    • Response time: < 120s.
    • Repeatability: < 1%.
    • Lower detectable limit (LDL): ≤ 0.05 ppm.
    • Resolution: 0.01 ppm.
    • Expected lifetime: > 3 years in air.
    • Long-term drift: < 1% per month.
    • Temperature range: -20°C to +55°C.
    • Pressure range: 800 to 1200 hPA.
    • Operating humidity range: 15–95%.
    • Cross sensitivity: Hydrogen Cyanide (< 1 ppm in 20 ppm concentration); Hydrogen (< 3 ppm in 100 ppm concentration); Sulfur Dioxide (<1 ppm in 10 ppm concentration )
  • Hydrogen Sulfide (H2S):
    • Measurement range: 0–100 ppm.
    • Maximum overload: 200 ppm.
    • Accuracy: ≤ 1 ppm.
    • Response time: < 20s.
    • Repeatability: < 1%.
    • Lower detectable limit (LDL): ≤ 1 ppm.
    • Resolution: 0.1 ppm.
    • Expected lifetime: > 3 years in air.
    • Long-term drift: < 1% per month.
    • Temperature range: -40°C to 50°C.
    • Pressure range: 800 to 1200 hPA.
    • Operating humidity range: 10–95%.
    • Cross sensitivity: Chlorine (-1.5 ppm in 10 ppm concentration); Carbon Monoxide (3 ppm in 50 ppm concentration); Hydrogen (3 ppm in 100 ppm concentration ); Nitrogen Dioxide (-2.2 ppm in 10 ppm concentration)
  • TVOC
    • Measurement range: 0–1000 ppm.
    • Maximum overload: 2000 ppm.
    • Accuracy: ≤ 1 ppm.
    • Response time: < 300s.
    • Repeatability: < 1%.
    • Lower detectable limit (LDL): ≤ 1 ppm.
    • Resolution: 0.1 ppm.
    • Expected lifetime: > 3 years in air. 
    • Long-term drift: < 1% per month.
    • Temperature range: -40°C to 55°C.
    • Pressure range: 800 to 1200 hPA.
    • Operating humidity range: 15–95%.
  • Volatile Organic Compound (VOC)
    • Sensor output: 0-500 VOC index.
    • Response time (τ 63%): < 10s.
    • Device-to-device variation:< ±15 VOC Index points.
    • Repeatability: < ±5 VOC Index points.
  • Nitrogen Oxide (NOX):
    • Sensor output: 0-500 NOX Index.
    • Response time (τ 63%) & < 30s.
    • Device-to-device variation: < ±50 NOX Index points.
    • Repeatability: < ±10 NOX Index points. 

The CS-AQMS1 is a cloud-based air quality monitoring system that records and displays real-time data for a wide range of parameters, such as particulate matter, pollutant gases, temperature, humidity, and barometric pressure. If you have an active internet connection, you can monitor this data live from your computer or phone, regardless of your location. This real-time information is valuable for assessing Indoor Air Quality (IAQ) or calculating the Air Quality Index (AQI).

Our air quality monitoring system is available in four versions, each equipped with four fundamental sensors: Particulate Matter, temperature, relative humidity (RH), and barometric pressure (BMP). Additionally, it provides the flexibility to choose three gas sensors from the available options (refer to the specifications), allowing users to tailor the system to meet specific requirements.

The CS-AQMS1 is designed to withstand extreme conditions, operating reliably in temperatures as low as -20°C and humidity levels up to 99%. However, readings may be affected, as the system is not calibrated for such extremes. Nonetheless, the system ensures data protection even under extreme conditions. During winter, snow accumulation might block the air inlet pathway; therefore, we have integrated a heater to mitigate potential issues arising from snow accumulation.

Name Version Release Date Downloads
Product Manual
1.0
7 March, 2024
Application Notes

[Application notes for CS-AQMS1 will be available here. Please check back later.]

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CS-AQMS1

*Educational institutions in developing countries, STEM education, young researchers, and small-scale farms, please contact for discounted prices