KeHeng SX-2.5-10T Integrated Benchtop Muffle Furnace
| Brand | KeHeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | SX-2.5-10T / SX-2.5-12T / SX-4-10T / SX-5-12T |
| Instrument Type | Box-Type Muffle Furnace |
| Max Operating Temperature | 1000 °C |
| Temperature Control Accuracy | ±5 °C |
| Rated Power | 2500 W |
| Heating Element | Kanthal A1 Resistance Wire |
| Internal Chamber Dimensions | 200 × 120 × 80 mm |
| Nominal Chamber Volume | 2 L |
Overview
The KeHeng SX-2.5-10T Integrated Benchtop Muffle Furnace is a compact, self-contained high-temperature thermal processing system engineered for routine laboratory applications requiring precise, repeatable heat treatment up to 1000 °C. Unlike conventional split-type furnaces with external controllers, this unit integrates the heating chamber and microprocessor-based temperature controller into a single ergonomic enclosure—eliminating cable clutter, reducing footprint, and enhancing operational consistency. The furnace operates on resistive heating principles, utilizing high-purity Kanthal A1 alloy resistance wire wound around ceramic insulators to deliver uniform radial heat distribution within the insulated chamber. Its muffle design isolates the sample from combustion byproducts and heating element emissions, ensuring contaminant-free thermal environments essential for ashing, calcination, sintering, and heat-treatment protocols in materials science, environmental testing, and quality control laboratories.
Key Features
- Integrated architecture: All-in-one housing combines furnace chamber, insulation, heating elements, and PID-controlled electronics—reducing installation complexity and improving thermal stability.
- Precision temperature regulation: Digital PID controller with programmable ramp-soak profiles, real-time temperature display (0.1 °C resolution), and auto-tuning capability for optimized response across operating range.
- Robust thermal insulation: Double-layer ceramic fiber insulation (≥1260 °C rated) minimizes surface temperature rise (<60 °C at ambient) and improves energy efficiency.
- Safety-certified construction: Equipped with over-temperature protection (independent mechanical limiter), door-interlocked power cutoff, and grounded chassis compliant with IEC 61010-1 safety standards.
- Corrosion-resistant chamber: Alumina-silica refractory brick lining (Al2O3 ≥95%) ensures long-term dimensional stability and resistance to alkali/acidic residue exposure during ashing procedures.
- Ergonomic access: Front-loading hinged door with high-temperature silicone gasket provides reliable sealing and easy sample loading/unloading without tooling.
Sample Compatibility & Compliance
The SX-2.5-10T accommodates standard crucibles (porcelain, alumina, platinum) and sample boats up to 200 mm in length. Its 2 L nominal volume supports ASTM E171 (standard practice for conditioning plastics), ISO 5660-1 (fire testing—heat release rate), and USP (heavy metals testing via dry ashing). The furnace meets general laboratory safety requirements per EN 61000-6-3 (EMC emission limits) and is suitable for GLP-compliant workflows when paired with validated calibration records and audit-trail-capable data loggers. While not inherently 21 CFR Part 11 compliant, its analog/digital output interfaces support integration with validated LIMS or SCADA systems for traceable thermal process documentation.
Software & Data Management
The embedded controller supports manual setpoint operation and multi-step temperature programming (up to 8 segments). Optional RS485 Modbus RTU interface enables bidirectional communication with third-party SCADA platforms or custom LabVIEW/Python scripts for automated logging. When connected to a calibrated external thermocouple (Type K, Class 1), the system supports periodic verification per ISO/IEC 17025 calibration guidelines. Data export is available via USB memory stick (CSV format) for post-processing in Excel or statistical analysis tools—facilitating trending of thermal cycle repeatability and deviation mapping across batches.
Applications
- Residue determination and total ash content analysis per AOAC 942.05, EPA Method 2540E, and ISO 2171.
- Pre-treatment of catalysts and battery electrode materials prior to XRD or SEM characterization.
- Thermal gravimetric analysis (TGA) sample preparation and inert-atmosphere pre-baking of ceramics.
- Calibration of thermocouples and reference materials using fixed-point temperature standards (e.g., Zn, Al, Cu).
- Controlled oxidation studies of metallic alloys and corrosion-resistant coatings under air atmosphere.
- Drying and annealing of thin-film substrates in semiconductor R&D labs with low particulate generation.
FAQ
What is the recommended maintenance schedule for the SX-2.5-10T?
Inspect ceramic fiber insulation integrity and door gasket compression annually; verify thermocouple accuracy against NIST-traceable reference every 6 months or after 200 thermal cycles above 800 °C.
Can the furnace operate under inert or reducing atmospheres?
No—this model is designed for air-atmosphere operation only. For controlled gas environments, consider KeHeng’s tube furnace series with flanged quartz/glass tubes and mass flow controller integration.
Is the internal chamber dimension truly usable for sample placement?
Yes—the 200 × 120 × 80 mm cavity allows full utilization of the 2 L volume; however, optimal thermal uniformity (±8 °C zone) is maintained within the central 70% volume per ASTM E220-22 calibration practices.
Does the unit include a factory calibration certificate?
A basic conformity report (including max temp verification at 1000 °C and control accuracy test at 500 °C) is supplied. Full ISO/IEC 17025-accredited calibration requires optional third-party service engagement.
