Carbolite Gero AAF 12/18 Advanced Ashing Muffle Furnace
| Brand | Carbolite Gero |
|---|---|
| Origin | United Kingdom |
| Instrument Type | Box-Type Muffle Furnace |
| Model | AAF 12/18 |
| Maximum Temperature | 1200 °C |
| Temperature Uniformity | ±5 °C |
| Rated Power | 7080 W |
| Heating Time to Max Temp | 70 min |
| Heating Element | Resistance Wire (SiC-Protected) |
| Internal Chamber Dimensions | 235 × 196 × 400 mm (W × H × D) |
| Construction | Dual-Shelf Configuration |
Overview
The Carbolite Gero AAF 12/18 Advanced Ashing Muffle Furnace is a rigorously engineered laboratory furnace designed for high-precision, repeatable ash content determination in compliance with internationally recognized analytical standards—including ASTM D3174, ISO 1171, USP , and EN 15403. Operating on the principle of controlled oxidative thermal decomposition, the AAF 12/18 maintains stable, uniform temperatures up to 1200 °C within a fully insulated refractory chamber, enabling complete organic matrix removal while preserving inorganic residue integrity. Its muffle architecture isolates samples from direct flame or combustion byproducts, ensuring contamination-free ash recovery essential for quantitative elemental analysis, calorific value assessment, and regulatory reporting in food safety, coal quality control, polymer certification, and environmental testing laboratories.
Key Features
- SiC-protected resistance heating elements—resistant to carbon deposition and corrosive off-gases generated during hydrocarbon-rich sample combustion (e.g., plastics, biomass, coal).
- Dual-shelf configuration increases effective sample loading capacity without compromising thermal homogeneity across the 235 × 196 × 400 mm internal chamber.
- Integrated high-chimney exhaust system combined with adjustable air inlet ensures rapid, laminar gas exchange—critical for minimizing volatile loss and preventing re-condensation of ash constituents.
- Preheated air supply mechanism delivers conditioned ambient air into the muffle zone, mitigating thermal gradients and supporting ±5 °C temperature uniformity per IEC 60584-2 calibration requirements.
- Multi-turn resistive coil layout compensates for convective heat loss induced by forced airflow, sustaining stable setpoint accuracy even under dynamic ventilation conditions.
- Robust ceramic fiber insulation and double-walled steel casing provide Class H thermal efficiency and surface temperature safety per EN 61000-6-3 EMC guidelines.
Sample Compatibility & Compliance
The AAF 12/18 accommodates crucibles (alumina, platinum, silicon carbide), quartz boats, and graphite pans up to 100 mL volume. It supports standardized ashing protocols for diverse matrices: foodstuffs (AOAC 942.05), coal and coke (ASTM D3174), plastics (ISO 3451-1), lubricants (ASTM D482), and municipal solid waste (EN 15403). All operational parameters—including ramp rates, dwell times, and cooling profiles—are programmable to meet GLP/GMP documentation requirements. The furnace’s construction and control architecture conform to CE marking directives, IEC 61010-1 safety standards, and support audit-ready traceability when integrated with compliant data logging systems.
Software & Data Management
While the AAF 12/18 operates via an intuitive front-panel controller with PID-based temperature regulation, optional RS485/Modbus RTU interface enables integration into centralized laboratory information management systems (LIMS) or SCADA platforms. When paired with Carbolite Gero’s optional TCC software suite, users gain access to electronic recordkeeping features aligned with FDA 21 CFR Part 11—including user-level access controls, electronic signatures, audit trails, and immutable event logs for temperature deviations, door openings, and cycle completion events. Calibration certificates (traceable to UKAS-accredited standards) and IQ/OQ documentation packages are available upon request.
Applications
- Quantitative ash residue determination in nutritional labeling and feed analysis.
- Proximate analysis of coal, lignite, and biofuels for energy content modeling.
- Residue evaluation in polymer degradation studies and additive formulation QC.
- Inorganic load assessment in pharmaceutical excipients and catalyst carriers.
- Preparation of ash-free filters for gravimetric particulate matter analysis (e.g., PM10, PM2.5).
- Supporting ISO/IEC 17025 accredited testing workflows requiring documented thermal stability and inter-laboratory reproducibility.
FAQ
What standards does the AAF 12/18 support for ash content testing?
It complies with ASTM D3174, ISO 1171, EN 15403, AOAC 942.05, and USP , with configurable heating profiles to match each method’s specified ramp rate and hold duration.
Is the furnace suitable for sulfur-rich samples such as coal or rubber?
Yes—the SiC-sheathed heating elements and corrosion-resistant chamber lining resist sulfidation and acidic gas attack typical in high-sulfur feedstock ashing.
Can the dual-shelf design be reconfigured for single-level operation?
Yes; shelves are removable and independently height-adjustable to accommodate tall crucibles or custom fixtures without recalibration.
Does the unit include temperature validation tools?
A factory-supplied NIST-traceable calibration certificate is provided; optional thermocouple mapping kits and qualification services (IQ/OQ/PQ) are available for regulated environments.
What maintenance intervals are recommended for optimal performance?
Annual inspection of insulation integrity, thermocouple drift verification, and chimney cleaning are advised—full service manuals and spare parts lists are supplied with each unit.
