Liquid Viewer | EP <2.9.20> - Lab-Wissen

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Liquid Viewer | EP <2.9.20>

This Liquid Viewer offers a simple method to detect visible particles in transparent liquids. It is designed according to the European Pharmacopoeia Specification <2.9.20>.

Liquid Viewer | EP <2.9.20>
  • According to the European Pharmacopoeia Specification <2.9.20>
  • Matt black panel of appropriate size held in a vertical position.
  • Non-glare white panel of appropriate size held in a vertical position next to the black panel.
  • An adjustable lamp-holder fitted with a suitable, shaded, white-light source and with a suitable light diffuser (a viewing illuminator containing two 13 W fluorescent tubes, each 525 mm in length, is suitable).
  • The intensity of illumination at the viewing point is maintained between 2000 lux and 3750 lux. Higher values are preferable for coloured glass and plastic containers.

  • Remove any adherent labels from the container and wash and dry the outside.
  • Gently swirl or invert the container, ensuring that air bubbles are not introduced
  • Observe for about 5 seconds in front of the white panel.
  • Repeat the procedure in front of the black panel.
  • Record the presence of any particles.
Technical Specifications:
Manufactured according to EP <2.9.20>
Measuring items:
Detection of Critical Angle of Optical Refraction
Number of Lamps
430 mm
590 mm
500 mm
Power Supply
240V / 50Hz
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