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Product Features
  • For testing the free swelling index number of coal
  • Also known as the crucible swelling number
  • For testing to BS ISO 501:2012 and ASTM D720-91(2010)
Delivery options

At Cadmus Products we aim to deliver orders efficiently and at highly competitive rates. 

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Carbolite SNF Swelling Number Index Furnace


The Carbolite SNF Swelling Number Index Furnace is designed to test the swelling index number of coal in accordance with the following standard test methods.

BS 1016-107.1:1991 Methods for analysis and testing of coal and coke. Caking and swelling properties of coal. Determination of crucible swelling number

Standard features

  • 30mA (RCD) residual current circuit breaker, protects the operator (because the test requires operation with the door open during heating)
  • Precise PID temperature control using 2132 controller
  • Supplied with wire crucible holder

Options (specify these at time of order)

  • Accessory crucibles and lids available
  • A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
  • Over-temperature protection (recommended to protect valuable contents & for unattended operation)
  • Spare parts available separately or in a kit comprising; thermocouple, thermocouple sheath, heating element, solid state relay (SSR) and door insulation piece
  • SNF-208SN SNF 900°C, Coal & Coke Testing Chamber Furnace (200 - 210 V-SR-single phase + N)
  • SNF-230SN SNF 900°C, Coal & Coke Testing Chamber Furnace (220 - 240 V -SR-single phase + N)
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