This website is still in development. If any bugs or errors are found, please use the contact form to report them.
Product Menu


What is Grade 50C?

Johnson Test Papers’ Grade 50C is a standard grade glass filter found in many environmental applications offering a smaller pore size than 50A (1.2 µm), with a slightly slower filtration speed. The properties of 50C filters are a standard in the determination of liquid scintillation counting and total suspended solids collection in potable water and in industrial waste. In biochemical tests, Grade 50C is suited for cell harvesting and the analysis of carbohydrates
Johnson Test Papers offers glass microfiber filters with a range of pore sizes and thicknesses. Browse other binder-free glass filters to find the right filters for your needs.

Total suspended solids filter

Grade 50C filters from Johnson Test Papers are widely used as a total suspended solids filter for applications testing both potable water and waste water. Grade 50C can be used for

  • A filter for liquid scintillation counting
  • Cell Harvesting
  • Industrial waste analysis
  • Binding assays that require high loading capacity
  • Analysis of carbohydrates by means of hydrolysis, filtration of solvents, cellular crops, clarification of samples, etc. where cellulose fibres are an inconvenience

Whatman Cross Reference = No.GFC
Speed class Medium / Fast, very high loading
Thickness (mm) 0.26
Pore size (μM) 1.2
Weight (g/m²) 52
Filtration Speed (sec*) 100
Burst Strength (Kg/cm²) 20
*According to DIN 53137
Available Sizes
Diameter (mm) Product Code
21 50C021
24 50C024
25 50C025
47 50C047
55 50C055
90 50C090
110 50C110
125 50C125