LimsPulse
Microbiology & sterility

Airborne particle counter

Counts and sizes airborne particles, typically at ≥0.5 µm and ≥5.0 µm, by measuring light scattered as each particle passes through a laser beam. Used to classify clean rooms and to monitor non-viable particles in Grades A–D.

  • Pharmaceutical
  • Biotech
  • Medical devices
  • Semiconductors
  • Hospitals
  • Aerospace
Photo of a Airborne particle counter
Photo: Panek, CC BY-SA 4.0 (cropped), via Wikimedia Commons
Follow your site SOP
This is a typical operating sequence for learning. Your instrument model and approved SOP take precedence.
STAGE 1

Before sampling

  1. 1Check the calibration label is in date and the battery is charged.
  2. 2Fit the zero-count (purge) filter and run a zero count; it should read zero or within the manufacturer's false count limit.
  3. 3Wipe the counter and probe with sterile 70% IPA before taking them into a clean area.
  4. 4Set the sample volume, the size channels and the location IDs as per the SOP.
  • Do not take the counter into Grade A/B without the approved cleaning and transfer steps.
STAGE 2

Sampling

  1. 1Place the isokinetic probe at working height, facing into the airflow.
  2. 2Use the shortest possible tubing and avoid sharp bends.
  3. 3Run the sample for the defined volume (e.g. 1 m³ for Grade A classification) and stand away from the probe.
  4. 4Record the counts for each channel and any alarms.
  • People near the probe release particles; keep your distance during sampling.
STAGE 3

After sampling

  1. 1Download or print the data and attach to the record.
  2. 2Compare counts with the alert and action limits for the grade.
  3. 3Clean the counter and store it with the inlet capped.
In LimsPulse · Calibration Management

Keep every Particle counter in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.

See how