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White circular glass microfiber filter membrane, 5.5 cm diameter, pack of 100

Lab Safety Supply Inc

Lab Safety Supply Inc 12K951 Filter Membrane 1.5um 5.5cm PK100

SKU CH-4VJZ-2XXJE

Binderless borosilicate glass microfiber filter membranes with 1.5 um pores and 5.5 cm diameter, supplied in packs of 100

  • TypeGround Fault and Current Leakage Testers
  • Binderless borosilicate glass microfiber prevents media shedding
  • 5 µm pore size captures fine particles in liquids or air
  • 5 cm diameter fits standard filter holders
  • Withstands 500 °C for high-temperature gravimetric analysis
  • Pack of 100 supports extended laboratory workflows

Lab Safety Supply 12K951 Filter Membrane

This binderless borosilicate glass microfiber filter is designed for laboratory filtration of liquids or air. It suits technicians and researchers who need consistent pore structure for particle retention or sample preparation. The grade E media provides a uniform matrix without added binders that could contaminate sensitive analyses.

Build quality and daily handling

The membrane measures 5.5 cm in diameter with a thickness of 0.35 mm, supplied in a pack of 100 discs. Its glass microfiber construction withstands temperatures up to 500 degrees C, allowing autoclaving or high-temperature gravimetric work. The binderless design reduces fibre shedding during wet or dry handling, supporting repeatable results across multiple tests.

Replaces standard cellulose or bonded filters

Laboratories using paper-based or resin-bonded discs that degrade at elevated temperatures or leach extractables will benefit from the thermal stability and chemical inertness of this grade. The upgrade is worthwhile when analytical protocols demand high-purity filtrate, thermal resistance above typical polymer limits, or consistent flow rates across a 100-piece lot.

Highlights

  • Binderless borosilicate glass microfiber prevents media shedding
  • 5 µm pore size captures fine particles in liquids or air
  • 5 cm diameter fits standard filter holders
  • Withstands 500 °C for high-temperature gravimetric analysis
  • Pack of 100 supports extended laboratory workflows

Specifications

BrandLAB SAFETY SUPPLY
TypeGround Fault and Current Leakage Testers

Questions about this item

What pore size does the 12K951 filter membrane use for particle retention?

The membrane has a 1.5 µm pore size that captures particles of that dimension and larger during liquid or air filtration.

What holder diameter is required for these 5.5 cm glass microfiber discs?

Each disc measures 5.5 cm in diameter, so a filter holder or funnel with a matching 5.5 cm sealing surface is needed for a proper fit.

How should the binderless borosilicate glass microfiber discs be prepared before first use?

Rinse the disc with distilled water or the working solvent to wet the 0.35 mm thick media and remove loose fibers before filtering the sample.

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