CF – Cupellation Furnaces

The CF cupellation furnaces are designed for the cupellation, or fire assay test, of precious metals, which is a standard test method used to determine their purity.

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The furnaces meet the Hallmarking requirements specified by the Convention on the Control and Marking of Articles of Precious Metals (known also as “Precious Metals Convention”, “Hallmarking Convention” or “Vienna Convention”). The test method produces hazardous vapours. When used within a suitable fume management system, the cupellation furnaces are designed to handle the vapours without exposing the operator to these hazards. The design of the cupellation furnace range ensures protection from the corrosive environment which would damage a conventional furnace. Carbolite Gero also offers a range of smelting/melting furnaces.

  Standard features
•  1200°C maximum operating temperature
•  Carbolite Gero 301 controller with single ramp to setpoint & process timer
•  Designed for testing using the cupellation method to ISO11426:1999 the standard test method used by the UK Assay Office, a reference quantitative assay method by
the International Hallmark Convention
•  Element over-temperature protection controller
•  Fitted with 7 day, 24 hour time-switch
•  Fumes are extracted through an insulated exhaust duct, with a removable container to collect condensed lead
•  Silicon carbide elements mounted above & below the chamber provide even heating of cupels, have good resistance to thermal shock and offer extended working life
at high temperatures
•  Silicon carbide lined roof and hearth protect the heating elements and resist the corrosive fumes emitted during the cupellation process
•  The airflow, controlled by an adjustable valve, is preheated before entering the work chamber
•  Up & away counterbalanced vertically opening door fitted with observation hole

  Options (specify these at time of order)
•  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)

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To make your order, please contact us at or call us at +6 06 3350 690

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