Compressed Air Particle Counting

For dry, clean compressed air and non-aggressive gases


Many compressed air users require clean and dry compressed air. Particle, residual oil content and humidity determine the quality of the compressed air.

The 130 Series is a new generation of laser particle counters optimized for applications in compressed air or compressed gases. With quality in mind and with the knowledge of costumers needs this instrument is designed for continuous operation 24 hours, 7 days a week. Depending on the selected model there is sensitivity available from 0.1 µm up to 5.0 µm. S 130 can fulfill the requirements stipulated in the compressed air standard ISO 8573-4. The measurement values represent the particle counts per ft3, l, m3 or alternatively in µg/m3. Settings can be done through the integrated display, our external display or through the service software.

Compressed air applications

  • Medical air
  • Pharmaceuticals
  • Breathable air
  • Marine air
  • Food and beverage
  • Medical engineering
  • High speed trains
  • Semiconductors fabs
  • Conveyance of hygroscopic food
  • High tech processes
  • Electronics industry


  • Easy connection to compressed air through 6mm quick-connector
  • Can be used as portable as well as stationary instrument
  • Particle sizes from 0.1 … 5.0µm (depending on model)
  • Optional display
  • Measures according to ISO 8573-4
  • Output signals: RS-485/Modbus/RTU, SDI (internal signal), Relay switch (NO)
  • Connectable to our displays  and data loggers as well as third parties displays and control units
  • Technical dataMeasuring medium:     Compressed air and gases free of corrosive, aggressive, caustic and flammable constituents
    Models:     Sigma 130-3: 3 channels: d: 0.3 < d ≤ 5.0 μm
    Sigma 130-5: 3 channels: d: 0.3 < d ≤ 5.0 μm with display & logger
    Sigma 132-8: 3 channels: d: 0.1 < d ≤ 5.0 μm
    Sigma 132-9: 3 channels: d: 0.1 < d ≤ 5.0 μm with display & logger

Efficiency:     50% (per JIS)
System pressure:     0.2 … 0.8 MPa
Flow rate:                  S 130: 2.83 l/min
S 132:  2.83 l/min
Sampling rate:          One sample per minute
Calibration:               NIST traceable
Measuring unit:         Particle counts per ft3, l of m3, te selectable concentration in µg/m3
Gas connection:       6 mm quick connect
Electrical connection: M12 connector
Display & Data Logger: 5″ touch screen, 100 million values  (optional)
Gas temperature:     0 … 40ºC (at inlet)
Ambient conditions:     10 … 4070ºC
Transport temperature:     -30…+70ºC
Output signal:     RS-485, Modbus/RTU SDI (internal signal) 4 … 20 mA, Alarm relay
Power supply:     24 VDC, 5 W
Application:     Downstream of filters wherever upstream drying and filtration is applied
Casing/dimensions:     PC, Al alloy,

Sigma 130  271 x 205 x 91 mm

Sigma 132  300 x 240 x 120 mm
Rating:     IP65
EMC:     According to IEC 61326-1
Settings:     Various sensor settings can be performed through the related service software
Weight:     1900 g

Measuring compressed air particles to ISO 8573 class 1.2.1

Sigma132,(order 1308)  particle counter for compressed air, size range d: 0.1 < d ≤ 5.0 μm
Sigma132,(order 1309)  particle counter for compressed air, size range d: 0.1 < d ≤ 5.0 μm, with display, logger.

These models can be used to cover the requirements of class 1.2.1

Contact us with details of your requirements