KJ GROUP OTF-1200X-S Miniature Opening-Type Tube Furnace (1200 °C)
| Brand | KJ GROUP |
|---|---|
| Origin | Liaoning, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic |
| Model | OTF-1200X-S |
| Instrument Type | Horizontal Tube Furnace |
| Max Temperature | 1200 °C (≤1 h), 1100 °C continuous |
| Temperature Control Accuracy | ±1 °C |
| Max Power | 1.2 kW |
| Heating Rate | ≤10 °C/min |
| Heating Element | Molybdenum-doped Fe–Cr–Al resistance wire with zirconia coating |
| Tube Dimensions | Ø25 mm OD / Ø20 mm ID × 450 mm L |
| Heating Zone Length | 200 mm |
| Uniform Zone | 60 mm (±1 °C at 1000 °C) |
| Vacuum Level | 1×10⁻² Torr (with mechanical pump) |
| External Dimensions | 750 mm × 300 mm × 400 mm |
| Net Weight | 18 kg |
Overview
The KJ GROUP OTF-1200X-S is a compact, horizontally oriented opening-type tube furnace engineered for precise thermal processing under controlled atmospheres—vacuum, inert gas, or reactive gas environments. It operates on the principle of resistive heating via high-stability molybdenum-doped Fe–Cr–Al alloy elements, encapsulated in a dual-layer insulated chamber lined with polycrystalline alumina fiber and surface-treated with imported alumina reflective coating. Designed for laboratory-scale synthesis, annealing, sintering, and CVD precursor decomposition, the furnace delivers repeatable thermal profiles up to 1200 °C (short-term) and sustained operation at 1100 °C. Its modular flange interface—equipped with stainless steel CF-compatible flanges, mechanical vacuum gauge, stop valve, and Swagelok-style tapered fittings—enables seamless integration into custom gas-handling or vacuum manifolds. The unit complies with CE safety directives and is rated for use in ambient conditions per IEC 61000-6-3 (EMC) and IEC 61000-6-4 (immunity).
Key Features
- Dual-shell construction with forced-air cooling system to maintain external surface temperature below 50 °C during extended operation.
- High-efficiency insulation using ≥99.9% pure polycrystalline alumina fiber (density: 128 kg/m³), minimizing radial heat loss and improving energy efficiency.
- Internally coated furnace chamber with US-sourced alumina ceramic layer (≥95% Al₂O₃), enhancing infrared reflectivity and reducing contamination from outgassing.
- Two sets of precision-machined alumina tube plugs included, designed to minimize axial convection and radiative losses at both ends of the hot zone.
- 30-segment programmable PID temperature controller with ramp-soak capability, real-time data logging (via optional RS485/Modbus interface), and over-temperature cut-off protection (hardware-based independent relay).
- Standard quartz tube configurations: two interchangeable sizes (Ø25 mm OD / Ø20 mm ID and Ø50 mm OD / Ø43 mm ID), both 450 mm long, rated for continuous use up to 1100 °C in clean, dry atmospheres.
Sample Compatibility & Compliance
The OTF-1200X-S accommodates samples housed in high-purity fused silica tubes, enabling compatibility with air-sensitive, moisture-sensitive, or volatile precursors common in materials science research. Its flanged configuration supports ASTM E29-23-compliant sealing practices and permits direct connection to standard vacuum components (KF25, ISO-KF, or Swagelok SS-4-6). When operated with certified mechanical pumps and calibrated gauges, the system achieves base pressures conforming to ISO 27327-1:2015 (vacuum system performance verification). All electrical components meet EN 61000-3-2 harmonic emission limits; structural design adheres to EN 61000-6-2 immunity requirements for laboratory electromagnetic environments. Documentation includes CE Declaration of Conformity, RoHS compliance statement, and factory calibration certificate for thermocouple input channel (Type K, ±0.5 °C accuracy).
Software & Data Management
While the furnace operates natively via its embedded PID controller, optional RS485 Modbus RTU communication enables integration with third-party SCADA platforms (e.g., LabVIEW, MATLAB, or DeltaV) for remote monitoring and automated protocol execution. Data logging interval is configurable from 1 second to 60 minutes; logged parameters include setpoint, actual temperature, power output (%), and alarm status. Audit trail functionality—including user login timestamps, parameter change logs, and firmware version history—is available when paired with KJ GROUP’s optional GLP-compliant data acquisition module (OTF-DAM-GLP), which satisfies FDA 21 CFR Part 11 requirements for electronic records and signatures. All firmware updates are digitally signed and validated prior to installation.
Applications
- Low-volume solid-state synthesis of metal oxides, chalcogenides, and perovskite precursors under N₂, Ar, or forming gas (5% H₂/95% N₂).
- Thermal annealing of thin-film substrates (Si wafers, FTO glass, flexible polymers) with tight uniformity control across 60 mm zone.
- Controlled pyrolysis of MOFs and polymer-derived ceramics under dynamic gas flow (0.1–500 sccm range, compatible with mass flow controllers).
- Pre-treatment of catalyst supports prior to impregnation or atomic layer deposition (ALD) seed layer formation.
- Calibration and validation of thermocouples and infrared pyrometers in accredited metrology labs (traceable to NIST standards via optional reference thermocouple kit).
FAQ
What vacuum level can be achieved with the standard configuration?
With a certified two-stage rotary vane pump and clean, dry quartz tubing, the system reaches ≤1×10⁻² Torr after 30 minutes of pumping. For lower base pressures, a turbomolecular pump upgrade is supported via KF25-to-KF40 adapter (optional).
Can the furnace be used for hydrogen atmosphere processing?
Yes—provided appropriate gas handling components (leak-tested stainless steel lines, explosion-proof solenoid valves, and H₂-specific pressure regulators) are installed upstream. Hydrogen service requires adherence to NFPA 55 and local fire code requirements; KJ GROUP provides technical guidance but does not supply H₂-rated accessories.
Is the temperature uniformity verified across the full 200 mm heating zone?
Uniformity is specified as ±1 °C within a 60 mm central region at 1000 °C. Full-zone mapping (per ASTM E220) is available upon request with optional multi-point thermocouple probe set (OTF-MAP-6P).
Does the unit support ramp-and-soak profiles with dwell times longer than 999 minutes?
Yes—the controller supports soak durations up to 9999 minutes per segment. Total program length is limited only by non-volatile memory capacity (1000 segments maximum).
Are replacement quartz tubes supplied with certificates of analysis?
Standard quartz tubes are provided with batch-level purity certification (OH⁻ content <10 ppb, metallic impurities <10 ppb each). High-purity grade (HPQ) tubes with individual COA and IR transmission report are available as a premium option.
