DRETOP SX2-12-12N Box-Type Muffle Furnace
| Brand | DRETOP |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | SX2-12-12N |
| Instrument Type | Box-Type Furnace |
| Maximum Temperature | 1200°C |
| Temperature Control Accuracy | ±1°C |
| Rated Power | 12 kW |
| Heating Time to Max Temp | 60 min |
| Heating Element | Nichrome Wire |
| Internal Dimensions (W×D×H) | 300 × 500 × 200 mm |
| Control System | Microcomputer-Based PID Controller |
| Nominal Chamber Volume | 30 L |
Overview
The DRETOP SX2-12-12N Box-Type Muffle Furnace is a precision-engineered laboratory thermal processing system designed for controlled high-temperature applications in research, quality control, and routine analytical workflows. Operating on resistive heating principles, it utilizes embedded nichrome wire elements distributed across all four chamber walls to generate uniform radiant heat transfer—eliminating convection-driven gradients and ensuring stable, repeatable thermal environments. With a maximum operating temperature of 1200°C and ±1°C control accuracy over its full range (RT + 50°C to 1200°C), the furnace meets stringent requirements for ash content determination (ASTM D3174, ISO 1171), loss-on-ignition (LOI) analysis (USP , EPA Method 9080), and thermal pre-treatment of inorganic samples prior to elemental analysis (ICP-OES, XRF). Its sealed muffle configuration isolates samples from combustion byproducts and external atmosphere, supporting applications under ambient air or with optional inert gas purging.
Key Features
- Four-wall heating architecture with helically wound nichrome wire elements ensures exceptional temperature uniformity (±3°C within working zone at 1200°C), critical for reproducible gravimetric and thermogravimetric analyses.
- Microprocessor-based PID controller with large-digit LED display enables intuitive setpoint entry, real-time monitoring, and programmable 30-segment ramp-hold profiles—including automatic shutdown upon completion.
- Dual-stage overtemperature protection: primary electronic cutoff at user-defined limit + independent mechanical backup relay; integrated voltage/current digital meters provide continuous electrical health diagnostics.
- Ergonomic front-loading design with reinforced ceramic fiber door seal and stainless steel inner flange (2 mm thickness) minimizes thermal leakage and facilitates rapid cooling without compromising structural integrity.
- Thermally insulated double-layer steel housing—phosphate-treated and high-temp epoxy-coated—delivers surface temperatures below 45°C during operation, complying with IEC 61000-3-2 harmonic emission standards.
- Automatic door-interlock circuit interrupts power upon opening, resuming heating automatically after closure—enabling safe intermediate sample access without recalibration.
Sample Compatibility & Compliance
The SX2-12-12N accommodates standard crucibles (alumina, platinum, silicon carbide) up to Ø90 mm × 60 mm height within its 30 L chamber. Its refractory brick-lined cavity (Al₂O₃ ≥ 92%) exhibits low thermal mass and minimal outgassing, making it suitable for ASTM E1111-compliant residue analysis, cement clinker calcination (ISO 679), coal proximate analysis (ASTM D3172–D3176), and catalyst activation protocols. The furnace conforms to GLP documentation requirements through built-in event logging (door open/close, overtemp triggers, power interruptions) and supports 21 CFR Part 11-compliant data integrity when paired with optional RS485 interface and audit-trail-enabled software. CE marking (2014/30/EU EMC Directive, 2014/35/EU LVD Directive) and RoHS compliance are certified per EN 61000-6-3 and EN 55011.
Software & Data Management
While the base N-series model features standalone microcontroller operation, optional NC-series color touchscreen upgrade provides embedded graphing capability, real-time temperature curve overlay, multi-level password-protected engineering access (admin/operator/maintenance tiers), and USB export of time-stamped CSV datasets. The RS485 port enables integration into centralized lab management systems (LIMS) via Modbus RTU protocol, supporting automated batch record generation aligned with ISO/IEC 17025 clause 7.7. Optional 4G-enabled data logger modules transmit operational logs and alarm events to cloud platforms for remote monitoring and predictive maintenance scheduling.
Applications
- Coal and coke analysis: ash fusion temperature (ASTM D1857), volatile matter (ASTM D3175), fixed carbon calculation.
- Environmental testing: TCLP extraction residue ignition (EPA SW-846 Method 3050B), soil organic matter quantification (Walkley-Black).
- Materials science: sintering of ceramic precursors, heat treatment of metal oxides, binder burnout in investment casting.
- Pharmaceutical QC: residual solvent validation (ICH Q2(R2)), excipient dehydration studies, tablet coating stability assessment.
- Academic research: kinetic modeling of decomposition reactions, calibration of TGA instruments, synthesis of nanomaterials via solid-state reaction.
FAQ
What safety certifications does the SX2-12-12N hold?
It complies with CE (EMC/LVD), RoHS, and meets IEC 60519-1 requirements for industrial electroheating equipment.
Can the furnace operate under inert atmosphere?
Yes—optional inlet/outlet ports support nitrogen or argon purging; recommended flow rate: 0.5–2 L/min to maintain positive pressure.
Is calibration traceable to national standards?
Factory calibration uses NIST-traceable reference thermocouples (Type S); users may perform in-house verification per ISO/IEC 17025 using calibrated secondary standards.
What maintenance intervals are recommended?
Inspect door gasket integrity every 200 operating hours; replace heating elements only after measured resistance deviation exceeds ±15% from nominal value.
Does the controller support remote firmware updates?
Firmware upgrades require local USB connection; network-enabled versions (NC-series with Ethernet module) support secure OTA updates via authenticated HTTPS endpoints.
