DRETOP SX2-12-12NP Box-Type Muffle Furnace
| Brand | DRETOP |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | SX2-12-12NP |
| Instrument Type | Box-Type Furnace |
| Maximum Temperature | 1200 °C |
| Temperature Control Accuracy | ±1 °C |
| Rated Power | 12 kW |
| Heating Time to Max Temp | 50 min |
| Heating Element | Nichrome Wire |
| Internal Chamber Dimensions | 300 × 500 × 200 mm (W × D × H) |
| Control System | Microcomputer-Based PID Controller |
| Nominal Volume | 30 L |
Overview
The DRETOP SX2-12-12NP is a benchtop box-type muffle furnace engineered for precise, repeatable high-temperature thermal processing in research laboratories and industrial quality control environments. Operating on resistive heating principles, it utilizes embedded nichrome wire elements arranged along all four chamber walls to generate uniform radiant heat distribution—eliminating hot/cold zones and ensuring stable isothermal conditions across the full 30 L working volume. Designed for applications requiring controlled atmospheric exposure (ambient air), the furnace supports thermal treatments including ashing, calcination, sintering, heat treatment of ceramics and metals, and standardized analytical procedures per ASTM E171, ISO 562, and USP <231>. Its rigid structural architecture, integrated safety interlocks, and dual-stage overtemperature protection meet baseline requirements for GLP-compliant thermal validation workflows.
Key Features
- Four-wall heating configuration with helically wound nichrome alloy elements ensures rapid, uniform thermal field development—typical temperature uniformity ≤±3 °C at 1200 °C across the usable chamber volume.
- Microprocessor-based PID controller with large-digit LED display provides real-time monitoring of setpoint, actual temperature, and elapsed time; supports 30-segment programmable ramp-soak profiles (NP-series variant).
- Integrated door-safety interlock automatically de-energizes heating elements upon door opening—preventing operator exposure to radiant heat and minimizing thermal shock to samples and refractory lining.
- Dual-level overtemperature protection: primary electronic cutoff at user-defined limit + secondary mechanical backup relay rated for continuous operation up to 1250 °C.
- Refractory chamber constructed from high-purity firebrick (Al₂O₃ ≥92%) with low thermal mass and optimized insulation density—reducing standby power consumption by ~22% versus conventional designs.
- Front-access chamber with reinforced stainless steel inner flange (2 mm thick) resists oxidation discoloration and facilitates residue removal after high-ash-content sample processing.
Sample Compatibility & Compliance
The SX2-12-12NP accommodates standard crucibles (alumina, silicon carbide, platinum, and nickel-based alloys) up to Ø120 mm × 80 mm height within its 300 × 500 × 200 mm chamber. It is routinely deployed in coal analysis (ASTM D3174 ash determination), catalyst thermal stability testing, pharmaceutical excipient dehydration (USP <631>), and cement clinker phase evaluation (ISO 679). The furnace complies with IEC 61000-6-3 (EMC emissions), IEC 61000-6-2 (immunity), and meets Class II electrical safety requirements under IEC 61010-1. Optional inert gas inlet (N₂/Ar) enables controlled-atmosphere experiments without modification to core hardware.
Software & Data Management
While the base NP-series controller operates independently, optional RS485 serial interface (Modbus RTU protocol) enables integration into centralized lab data acquisition systems. When paired with DRETOP’s optional NC-series color touchscreen module, users gain access to real-time temperature curve visualization, password-protected engineering mode (three-tier access), audit-trail logging compliant with FDA 21 CFR Part 11 Annex 11 requirements, and exportable CSV-formatted thermal history reports. All firmware updates are performed via USB port without external programming tools.
Applications
- Coal and coke proximate analysis (moisture, volatile matter, fixed carbon, ash content) per ASTM D3172–D3176.
- Residue-on-ignition testing for inorganic impurities in APIs and excipients (ICH Q5D, USP <231>).
- Thermal gravimetric pre-conditioning of ceramic green bodies prior to sintering.
- Calibration verification of thermocouples and RTDs using fixed-point metal baths (Zn, Al, Cu).
- Pre-oxidation of metal foils and thin films in materials science R&D.
- Heat aging studies of polymer composites under ISO 2578 and ASTM D573 protocols.
FAQ
What is the maximum recommended continuous operating temperature?
The furnace is rated for continuous operation at 1200 °C. Short-term excursions to 1220 °C are permissible for ≤30 minutes per cycle, provided cooling to ≤100 °C occurs before subsequent heating.
Can this furnace be used under inert or reducing atmospheres?
Yes—when equipped with the optional inert gas inlet kit (standard NPT 1/4″ female port), nitrogen or argon purge flow rates of 0.5–2.0 L/min maintain oxygen partial pressure below 100 ppm.
Is the temperature uniformity validated per industry standards?
DRETOP provides a factory calibration certificate indicating measured uniformity (±3 °C at 1200 °C, 3-point probe method per ASTM E220), traceable to NIM (China National Institute of Metrology).
Does the unit support remote monitoring via Ethernet or Wi-Fi?
No native Ethernet/Wi-Fi; however, third-party Modbus-to-Ethernet gateways (e.g., Moxa EDS-205A) may be deployed externally to enable SCADA integration.
What maintenance intervals are recommended for optimal performance?
Inspect door gasket integrity and chamber brick condition every 200 operational hours; verify thermocouple calibration annually or after 500 thermal cycles above 1000 °C.
