Glass Fiber Circles

Low hygroscopicity Chemically and biologically inert, with no organic binders Offer higher retention

efficiency of fine particles (<3µm in size)Resist clogging for greater loading capacity than cellulose

paper filters Autoclavable and usable to 500°C (932°F)Filters should be used flat: folding will break

the glass fibers

Specifications Material Glass Fiber Autoclavable Yes Flow Rate Fast Particle Retention 1.6µm Thickness (English) 0.012 in. Diameter (English) Outside 1.6 in. Diameter (Metric) Outside 4.2cm For Use With (Application) General purpose, air pollution monitoring, biochemical biological filtration cells, precipitated proteins, scintillation counting, radioimmunoassays Grade G6 Temperature (Metric) Max 500°C Thickness (Metric) 0.32mm Temperature (English) Maximum 932°F

Description Folded for fast filtration of coarse particles and gelatinous precipitates Qualitative Grade; nominal retention 30-35µm; 0.26mm thick Pleating and creped surface increase effective area, improving both filtering speed and extending filter life Wet strengthened†

Filter Papers; Whatman; Qualitative; Circles and sheets; Grade 4; Retains coarse particles; Gelatinous precipitates; Particle retention: >20-25µm; Surface: Smooth; Porosity: Coarse; Filtration speed: Herzberg, 37 seconds; 320mm dia.

Sibata glassware is known throughout Japan and the USA for its high quality, precision laboratory glassware.  These volumetric flasks meet the highest US Federal standards for ASTM E 288 Class A (Lab Grade) volumetric flasks.  Sibata volumetric flasks have the same composition as Pyrex 7740 or Kimble KG-3 

 

• Machine-blown bodies with heavy beaded, heavy tubing necks, tooled for stoppers. 
• Large, white block letters for easy reading of the labeling 
• Precise volume measurements @ 20° C 
• Sharp and permanent graduation lines 
• Supplied with a 9 ground glass stopper 

  VEE GEE® Hydrometers, Baume (Heavy)

• Standard Temperature: 60°F,
• Accuracy: ±1,
• Subdivision 0.1°, and
• Length 310 mm.