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Compressed Air Quality Monitoring According to ISO 8573-1

Compressed air is an important medium in industrial, automated production. This makes it more important to continually improve the quality of compressed air systems for users. ISO 8573 defines the most important impurities in compressed air, including particles, water, gases, microbiological content, and oil. CS INSTRUMENTS offers customised solutions for stationary and Portable monitoring. Our products help reduce the risk of contamination in end products, increase process reliability, and extend the service life of pneumatic components. Contact us today!

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Compressed Air Quality Monitoring According to ISO 8573-1

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  1. Compressed Air Quality Monitoring Compressed Air Quality Monitoring According to ISO 8573-1 According to ISO 8573-1 Ensuring purity & reliability in industrial compressed air

  2. Importance of Quality in Compressed Air Compressed air is an important medium in industrial, automated production. This makes it more important to continually improve the quality of compressed air systems for users. ISO 8573 defines the most important impurities in compressed air—particles, water, gases, microbiological content, and oil. In many cases, lab samples only supply a snapshot and involve delays. Instead, inline monitoring under real operating conditions provides continuous insight, enables faster response to problems, and enhances process reliability.

  3. ISO 8573 Standard Overview ISO 8573 is segmented into different parts that address specific contaminants: Part 1: Impurities and cleanliness classes Part 2: Oil aerosol content measurement Part 3: Humidity/moisture test methods Part 4: Solid particle content Part 5: Oil vapour & organic solvents Part 6: Gaseous pollutants Part 7: Microbiological contamination Parts 8 & 9: Mass concentration and liquid water content Inline continuous measurement focuses on oil aerosols, moisture, and particles.

  4. Key Measurement Technologies & Challenges: Online measuring systems use modern sensors (e.g., PID sensor technology) for continuous, high-precision oil vapour detection. For particle measurement, laser particle counters are commonly used, often connected via ball valves or quick couplers for steady measurements. Lab sampling yields average values and time delays, which are not ideal for real-time control. Measured values are continuous, recorded, and can trigger alarms when limits are exceeded.

  5. CS INSTRUMENTS Product Solutions for ISO 8573 Compliance We recommend the following CS INSTRUMENTS products to monitor and ensure compressed air quality: OIL CHECK 500 Particle Counter PC 400 Dew Point Sensor FA 510 DS 500 Chart Recorder For permanent, high-accuracy measurement of vaporous residual oil (0.001 to several mg/m³). Measures particles from 0.1 µm for ISO 8573 class 1 monitoring. Monitors pressure dew point down to –80°Ctd; supports continuous alerting if dryer fails. Acts as the central hub; measures and logs residual oil, particles, and moisture; supports up to 12 sensor inputs and alarm functions.

  6. Benefits of ISO-Based Monitoring & Why It Matters Real-time detection of quality deviation reduces the risk of contamination or process failures. Alarms help trigger timely maintenance on dryers, filters, and systems to prevent damage. Continuous inline measurement offers greater visibility than intermittent lab sampling. Ensures compliance with industry standards, protecting product integrity and equipment.

  7. THANK YOU! GET STARTED TODAY! www.cs-instruments.com/za

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