High-accuracy weighing module

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Overview
For organic matter a custom design AAF 11/18 ashing furnace with balance up to 1100°C can be used for loss on ignition (LOI) applications in air. Weight change of the sample is monitored during the heating process and this is required, for example, in the determination of organic matter content in materials such as sediment, sludge, soil and waste.

For inorganic matter
For inorganic matter a custom design CWF chamber furnace, up to 1100°C, with balance can be used for thermogravimetric analysis (TGA) and loss on ignition (LOI) applications in air, where weight change of the sample must be monitored during the heating process. This is required, for example, in the determination of inorganic matter content in materials such as cement, lime, calcined bauxite and refractories.

Mass loss during heat treatment under inert gas atmosphere
Under inert gas custom made ovens and furnaces can be fitted with a balance for continuous sample weighing. A heated gas outlet with either an active after burner or a condensation trap is recommended for certain amounts of organic matter.

Carbolite Gero Custom Furnaces & Ovens - Examples

• Custom Design AAF with Weighing Balance — for determination of organic matter content (example: AAF 11/18, up to 1100°C)
• CWF chamber furnace with balance — for TGA and LOI of inorganic materials (up to 1100°C)
• Custom made retort furnace up to 900°C for 250 kg load with balance (accuracy 5 g) for mass loss under inert gas atmosphere
• Bespoke HTMA 6/96 up to 600°C under inert atmosphere with custom designed continuous sample weighing

Applications

• Loss on Ignition (LOI)
• Thermogravimetric Analysis (TGA)
• Determination of organic content in sediment, sludge, soil, waste
• Determination of inorganic content in cement, lime, calcined bauxite, refractories

Technical characteristics / specifications

• Custom designs for continuous sample weighing integrated into furnaces and ovens
• Typical maximum temperatures cited: up to 1100°C (AAF, CWF examples)
• Example retort furnace: up to 900°C for 250 kg load with balance (accuracy 5 g)
• Example HTMA: up to 600°C under inert atmosphere with continuous weighing
• Suitable atmospheres: air and inert gas
• Recommended exhaust options for organic matter: heated gas outlet with active after burner or condensation trap
• Intended uses: LOI and TGA monitoring of mass change during heating
• Solutions range from modified standard products to fully bespoke configurations