Carbolite Gero SNF Swelling Number Index Furnace
This furnace is designed to test the swelling index number of coal in compliance with the standards BS ISO 501:2012, “Hard Coal – Determination of the Crucible Swelling Number,” and ASTM D720-91 (2010), the standard test method for the free-swelling index of coal.
A known mass of coal is heated within a crucible in adherence to a set procedure. After the process, a swelling number can be determined by comparing the size and shape of the residual to the referenced outlines.
- Compliant with BS 1016-107.1:1991.
- Power supply 220-240V single phase.
- Weight 26kg.
The furnace comes with a 132 base controller, and a crucible wire holder is also supplied. The continuous operating temperature is 850 °C, with a maximum power consumption of 800 watts. External crucible height 26mm, outer diameter 41mm, internal diameter at the base 11mm.
For protection, a 30 mA (RCD) residual current device is standard.
Options
- Over-temperature protection for long periods of unattended operation.
- Additional crucibles and lids available.
- Spares Kit which includes a thermocouple, thermocouple sheath, heating element, solid-state relay (SSR) and door insulation piece.
- Upgrade to a 24-segment programmable controller.
- RS232 and RS485 communication options.
- Spares kit includes: Sheath, thermocouple, power relay SSR, heating element & door insulation.
