CF-520 Gellert Tensile Tester (US Standard)

Main application
Used for measuring the bending resistance (tensile strength) of materials such as paper, cardboard, fabric, non-woven fabric, and artificial leather. 
Technical indicators 
1. Measurement range: 1.39 mg to 56888 mg (Gelletier stiffness unit) 
2. Sample length: 25.4 mm (1 inch), 38.1 mm (1.5 inches), 63.5 mm (2.5 inches), 114.3 mm (4.5 inches) 
3. Sample width: ≤ 50.8 mm (2 inches) 
4. Sample holder position (test length): 12.7 mm, 25.4 mm, 50.8 mm, 101.6 mm 
5. Sample rack swing speed: 2 revolutions per minute 
6. Weights: 5g, 10g, 25g, 50g, 100g, 200g 
7. Center distance of the weight slot: r_l = 25.4mm, r₂ = 50.8mm, r₃ = 101.6mm 
Applicable Standards 
— The American Pulp and Paper Industry Technology Association TAPPI T543-2011 "The Bending Resistance of Paper (Grelle Stiffness Tester)" 
— American Society for Testing and Materials (ASTM) D6125-97 "Bending Resistance of Paper and Paperboard (Gelre Stiffness Tester)" 
— The American Institute of Environmental Science (IEST-RP-CC021.2, 2005) "Test Methods for HEPA and ULPA Filters" 
—     China Refrigeration and Air Conditioning Industry Association CRAA 433 "Test Methods for Air Filter Performance"