LimsPulse
Dosage-form testing

Liquid Particle Counter (Light Obscuration)

Counts and sizes sub-visible particles in injections by passing the liquid through a narrow light beam. Each particle casts a shadow whose size gives the particle size. Used for the USP <788> particulate matter test.

  • Pharmaceutical (parenterals)
  • Biotech
  • Medical devices
  • Industrial fluids
PREVENTIVE MAINTENANCE

Maintenance checklist

Each use

  • Flush the sensor with particle-free water
  • Run a water blank
  • Check syringe for air

Monthly

  • Clean sensor with a mild detergent as per the manual
  • Check sample volume accuracy

Annual (or as per chapter)

  • Sizing calibration with certified spheres
  • Sensor resolution and counting accuracy checks
  • Sample volume accuracy and flow rate verification
SAFETY

Safety precautions

Before you work on the Liquid particle counter
  • The sensor contains a laser diode; do not open it.
  • Handle glass ampoules and broken glass carefully.
  • Cytotoxic or potent injections must be tested in a suitable containment cabinet.
In LimsPulse · Calibration Management

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

See how