Shanghai Xinrui SX-5-12 Benchtop Muffle Furnace
| Origin | Shanghai, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | SX-5-12 |
| Rated Voltage | 220 V AC |
| Rated Power | 5 kW |
| Maximum Operating Temperature | 1200 °C |
| Internal Chamber Dimensions | 300 × 200 × 120 mm (L×W×H) |
| Heating Element | Kanthal A1 resistance wire |
| Insulation | High-density ceramic fiber board (≥120 mm thickness) |
| Temperature Control | PID digital controller with ±1 °C stability at setpoint |
| Compliance | Meets GB/T 10066.1–2004 (General requirements for industrial resistance furnaces), compatible with ISO/IEC 17025 laboratory environmental conditioning workflows |
Overview
The Shanghai Xinrui SX-5-12 is a benchtop muffle furnace engineered for precision-controlled, repeatable high-temperature thermal processing in academic laboratories, quality control facilities, and materials R&D environments. Operating on resistive heating principles, the furnace employs Kanthal A1 alloy heating elements embedded within a double-layer insulation architecture—comprising refractory brick lining and high-purity ceramic fiber board—to achieve rapid heat-up rates, minimal thermal gradient across the chamber (<±5 °C at 1200 °C), and energy-efficient steady-state operation. Its muffle design fully isolates the sample zone from combustion byproducts and external air currents, ensuring inert, oxidation-controlled conditions essential for ashing, calcination, sintering, and thermal gravimetric pre-treatment. The unit complies with fundamental safety and performance criteria outlined in GB/T 10066.1–2004 and supports traceable temperature validation per ISO/IEC 17025 Clause 5.10.3 when used with calibrated thermocouples (Type S or K, Class 1).
Key Features
- Benchtop footprint (approx. 580 × 420 × 490 mm) optimized for limited lab space without compromising usable chamber volume (7.2 L)
- Robust steel housing with electrostatic epoxy coating for corrosion resistance and mechanical durability
- Double-skin construction with >120 mm total insulation thickness minimizes external surface temperature (<60 °C at 1200 °C ambient)
- Counterweighted lever-latch door mechanism ensures consistent sealing force and reproducible thermal closure integrity
- Digital PID temperature controller with ramp-soak programming, real-time display, and over-temperature cut-off (1250 °C hardware limit)
- Front-panel accessible thermocouple port for external monitoring or third-party data logging integration
Sample Compatibility & Compliance
The SX-5-12 accommodates standard crucibles (alumina, silica, platinum, or stainless steel up to 1200 °C), ceramic boats, and small metal specimens (≤300 g typical load). Its uniform heating zone spans ≥85% of the chamber volume, validated per ASTM E220 calibration methodology using multi-point thermocouple mapping. The furnace supports GLP-aligned workflows: temperature setpoints, dwell times, and ramp rates are manually logged or exported via optional RS485 interface (Modbus RTU protocol). While not certified to UL 746 or IEC 61000-6-3 out-of-the-box, it meets CE-equivalent EMC and safety thresholds for laboratory use under controlled installation conditions (grounded 220 V ±10%, 50 Hz supply; dedicated 32 A circuit recommended).
Software & Data Management
The SX-5-12 operates as a standalone instrument with no proprietary software dependency. All thermal profiles are configured directly via the front-panel keypad and LCD. For audit-trail compliance, users may integrate external data acquisition systems using the analog 0–10 V output (proportional to measured temperature) or digital Modbus RTU signals (available with optional communication module). When deployed in ISO/IEC 17025-accredited labs, documented calibration certificates (traceable to NIM or equivalent national metrology institutes) and routine verification using reference standards (e.g., nickel-aluminum eutectic, 1385 °C) fulfill data integrity requirements under Clause 7.7.
Applications
- Quantitative ash content determination per AOAC 942.05, ASTM D2974, and ISO 1171
- Pre-treatment of catalysts, battery cathode precursors, and ceramic powders prior to XRD or SEM analysis
- Controlled oxidation of metallic samples for oxide layer growth studies
- Thermal decomposition kinetics experiments requiring precise isothermal holds between 300–1200 °C
- Small-batch annealing and stress-relief heat treatment of tool steels and non-ferrous alloys
- Calibration reference source for infrared pyrometers and thermographic systems
FAQ
What is the maximum continuous operating temperature?
The SX-5-12 is rated for continuous operation at 1200 °C. Short-term excursions to 1250 °C are permitted for <15 minutes during calibration or system verification.
Is the furnace suitable for inert-atmosphere processing?
No. It is an open-air muffle design without gas inlet/outlet ports. For controlled atmospheres, consider models with flanged quartz tubes or optional nitrogen purge kits (not included with base unit).
How often should temperature uniformity be verified?
Per ISO/IEC 17025 guidance, verify chamber uniformity annually—or after any major maintenance—using at least nine-point mapping per ASTM E220 Annex A3.
Can Type-K thermocouples be used for process monitoring?
Yes. The built-in thermocouple is Type-K; however, for measurements above 1000 °C, Type-S (platinum/rhodium) is recommended for long-term stability and reduced drift.
Does the unit include a calibration certificate?
No. A factory calibration report is provided; full NIST-traceable certification requires third-party service and is user-requested at time of order.
