LimsPulse
Cosmetics testing

In vitro SPF analyser (UV transmittance analyser)

Measures how much ultraviolet light passes through a thin film of sunscreen spread on a roughened PMMA plate, then calculates in vitro SPF, UVA protection factor and critical wavelength from the transmittance spectrum.

  • Cosmetics & personal care
  • Sunscreen manufacturers
  • UV filter suppliers
  • Contract testing labs
  • Textiles (UV protection)
Illustration of In vitro SPF analyser (UV transmittance analyser)
PREVENTIVE MAINTENANCE

Maintenance checklist

Daily / each use

  • Check lamp warm-up and baseline stability
  • Clean the sample stage and optical windows with lint-free tissue
  • Store PMMA plates clean, dry and away from dust

Monthly

  • Run the reference sunscreen and trend its result
  • Check lamp hours and intensity against the manufacturer's limit
  • Back up spectra and results

Every 6–12 months

  • Wavelength and transmittance verification with certified filters
  • Solar simulator irradiance check with a calibrated radiometer
  • Preventive maintenance by the supplier

As needed

  • Replace the lamp when intensity or noise is out of specification
  • Re-verify after lamp change, repair or relocation
SAFETY

Safety precautions

Before you work on the SPF analyser
  • UV radiation damages eyes and skin. Keep covers closed and use UV-blocking glasses near open sources.
  • Xenon lamps run hot and are under pressure; let them cool before changing and follow the manual.
  • Some UV filters and solvents are skin sensitisers; wear gloves when spreading products.
  • Dispose of used plates and wipes as chemical waste if the products contain solvents.
In LimsPulse · Calibration Management

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

See how