The automatic softening point tester NBA 440 uses the ring and ball method to determine the softening point of asphalt, bitumen, tar, pitch and resins. The NBA 440 unit includes a microprocessor control top section with waterproof keyboard and display.
The bottom section includes a control board, safety board, heating element, cooling fan, mechanical stirrer, lamp and two optical sensors, and a standard beaker with dual ring holder.
The mechanical stirrer is specially designed not to influence the falling of the balls and to insure good temperature homogeneity inside the beaker. The NBA 440 is delivered with a RS232 connection and printer outlets. Printing out temperature gradients all along a test process is also possible.
The user-friendly software allows to program safety cuts-off and keyboard calibrations, to display and print out configuration test reports that can be of interest for traceability.