Sensitivity range: 0.2 - 10.0 µm

4 Channel Air Particle Sensor

The Airnet® II 4 Channel Air Particle Sensor meets the specifications of ISO 21501-4 to measure the size and number of particles suspended in the air for real-time monitoring of defect-causing particles.

A simple and cost-effective way to monitor your cleanroom, the Airnet II Particle Sensor provides unparelled performance with data transmission capabilities for remote monitoring. Versatile power options combined with an ultra-small footprint makes the Airnet II Air Particle Sensor easy to install right where you need it.

The unit can be configured to accept distributed power from an in-house system or power over ethernet (PoE). Data integrity is maintained through the use of a data queue feature that continues to gather data even if communication is lost. To ensure proper flow conditions and vacuum system operation, these units incorporate a Dynamic Flow Sensing system that will alarm with a 15% change in flow conditions.

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  • 4 channels
  • 0.2, 0.3, 0.5, 1.0, 5.0, and 10.0 μm size range
  • 0.1 or 1.0 CFM flow rate
  • Interfaces with object linking and embedding (OLE) for process control (OPC) communications, Modbus communications and optional 4-20 mA output
  • Chemical-resistant polycarbonate (PC) enclosure
  • Low sample point cost
  • Small enough for use in remote locations


  • Proven technology provides reliable and accurate data
  • Allows for immeditate reaction to particle contamination events
  • A low-cost solution for multipoint monitoring
  • Interfaces with Facility Net, Pharmaceutical Net and FacilityPro Software for comprehensive management of cleanroom conditions
  • A small footprint and flexible mounting options make it easy to install in cleanrooms and mini-environments
  • A laser diode (LD) drastically reduces the need for maintenance and extends product lifecycle
  • Automatic laser shutdown reduces laser failures
  • Real-time monitoring of defect-causing particles
  • Easy to clean/wipe down; designed to minimize particle traps
  • Power over Ethernet (PoE) simplifies installations
  • OPC or Modbus TCP communications easily utilized
  • Optional 24 VDC input / 4-20 mA output configurations available


  • Cleanroom monitoring
  • Dedicated monitoring of critical locations
  • Trend analysis
  • Statistical process control
  • Multi-location monitoring

Supporting Materials

a. Minimum and maximum interval are used to define two different sample interval. The minimum sample interval is used by the instrument when at least 1 particle is detected during the sample. in case the instrument will count “0” during the sample, then the “maximum” sample interval is used by the instrument till at least one particle will be detected. This function was implemented in the past as method for data storage space saving. In other words, if the instrument will not count any particles for 3600 seconds (60 minutes), will simply don’t provide any data output; the data output string you will then get when the maximum sample interval will be reached will report the total sample time with the particle result (in this case “0”) b. Considering the actual hard drive technology and cost, this method can be considered negligible and the you can simply configure the instrument with the same sample interval (minimum and maximum), so you will have a data output updated every XX seconds (normally 60) despite the counting level. a. Data queuing is a very important functionality designed to guarantee reliable data communication. b. This parameter, when configured with a value different from 0, allow the instrument to automatically send out the data when the communication is restored after a communication lost. In example, configuring the data queue to 480 samples, in the unlikely case of communication lost, the instrument will continue to up to 480 (or different, depending on the configuration) sample data; as soon as the communication will be restored you will be able to collect all the stored data to your software. It is possible to count zero particles for multiple samples and means that your clean room are well designed and operating. As example, semiconductor cleanroom can reach cleanness performance of 0 particles @ 0.1um for more than one cubic meter of air (more than 35 minutes sample).Anyway, the instrument is equipped with a special algorithm to verify performance of the detector and laser to ensure that any hardware failure is detected and provide an alarm.

Available Accessories

Facility Net

Facility Net

Facility Net provides a solution for comprehensive environmental monitoring, including a real-time and historical data display. Compatible Particle Measuring Systems particle counters and molecular contamination monitors, as well as various third-party products.

High-Pressure Diffuser (0.1 CFM)

High-Pressure Diffuser (0.1 CFM)

The High-Pressure Diffuser lets you count particles in high-pressure gas lines by taking gas at pressures between 40 and 100psi and reducing it to a level acceptable to particle counters designed for atmospheric pressure.

IsoAir® Protection System

IsoAir® Protection System

The IsoAir® Protection System protects your particle counter with a polycarbonate (PC) cover and stainless steel enclosure so you don't have to remove it from its environment. Featuring a capped probe, the IsoAir Protection System even stays protected during sterilization.

Isokinetic Sampling Probe

Isokinetic Sampling Probe

The Isokinetic sampling probe allows you to move sample collection to where you need it most.

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FacilityPro® Environmental Monitoring

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IsoAir 310P Particle Sensor

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