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Softening Point Tester:

  • Ring-and-ball softening point tester
  • For samples without sharply defined melting points
  • Suitable for measuring bitumen
  • Automatic assessment of results according to the requirements of the standard
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The ring-and-ball softening point tester automatically determines the temperature at which a substance attains a particular degree of softness. It is used for samples without sharply defined melting points, which become softer and less viscous as the temperature rises.
The RKA 5 with its different ball-centering and dispensing devices is used for bitumen.

Key features

Benefits at a Glance

  • Temperature-heating rate chart for conformity check of each test
  • Multi-point temperature calibration
  • Provision against the erroneous detection of air bubbles
  • Automatic assessment of results acc. to the requirements of the standard
  • Statistical and database functionality
  • The heating system is spill-protected and in a sealed case for safe operation and easy cleaning

Convenient Operation

  • A laser scanner system covers the whole beaker cross-section area. This ensures a very reliable detection of the falling ball.
  • The smart jog wheel operation system (turn and push) and Pmove®, as an innovative operation platform, make it easy to select one of the pre-set standard programs or choose one of the 20 user-definable settings.

Customized User Flexibility

  • Automatic electromagnetic ball-dispensing system (optional) recommendable for softening points > 80 °C.
    It consists of a standard test rack and centering guides in combination with two electromagnetic holders for the automatic ball dispensing after 15 min.
  • Bar code scanner (optional) for up-to-date sample identification

Technical specifications

Configuration RKA 5 incl. test rack with manual ball-centering and dispensing device
Application range up to 160 °C
Test places 2
Heating IR radiation, ROBAX® heating plate, spill-protected
Stirring 100 rpm to 150 rpm (program-dependent)
Display 5” graphical color, graphical menu guidance
Cooling after test Powerful fan
Temperature probe Pt100 (4-wire, gold contacts)
Interfaces RS232, 3x USB, LAN, LIMS compatibility
Power supply 115 V or 230 V, 50 Hz/60 Hz, 1.2 kW
Dimensions 230 mm x 470 mm x 520 mm (W x D x H)
Weight approx. 12 kg
Resolution 0.1 °C





EN 1427


IP 58


JIS K 2207

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