The Gehman Stiffness Tester evaluates the torsional stiffness of rubber at low temperature according to ISO 1432.
The testing operation is automatic and specimens are twisted by means of torsion wires having nominal torsional constants at programmed test temperature.
The angle of twist produced at this time is detected and is sent to the PC.
Test Stations - 4
Specimen Sizes - Length: 40mm
Width: 3mm
Thickness: 2mm
Clamps Span - 25±3mm
Temperature Range (°C) - -70 to +23
Heat-transfer Medium - Ethanol
Cooling System - Refrigerator
Temperature Control Accuracy - ±1°C
Angle of twist - 180°
Torsion Angle Resolution - 0.1°
Power Supply - Main unit: Single-phase, AC100V, 50/60Hz, 1.1kVA
Refrigerator: Single-phase, AC100V, 50/60Hz, 0.3kVA
(or specify)
Dimensions - W300 × D500 × H930mm
Weight (approx.) -
Main unit: 68kg
Refrigerator: 73kg