KJ GROUP OTF-1200X-5S Benchtop Opening-Type Tube Furnace

Overview

The KJ GROUP OTF-1200X-5S is a compact, CE-certified benchtop opening-type tube furnace engineered for precise thermal processing in research and small-scale production environments. Designed around a horizontal, front-opening configuration with dual-layer stainless steel housing and high-emissivity alumina oxide coating, the furnace delivers enhanced thermal efficiency and superior temperature uniformity across its 300 mm heating zone. Its core architecture integrates a high-purity quartz tube (130 mm OD, 640 mm L) mounted between two vacuum-tight stainless steel flanges — enabling controlled atmosphere or vacuum annealing, sintering, oxidation, reduction, and CVD precursor reactions. The furnace operates up to 1000°C for short-term treatments (≤1 hour) and maintains stable continuous operation at 900°C, making it suitable for semiconductor wafer annealing (up to 4-inch diameter), thin-film processing, catalyst activation, and ceramic pre-sintering. Its modular design supports vertical orientation when required, extending experimental flexibility without structural modification.

Key Features

• Dual-layer insulated shell with high-temperature alumina oxide coating improves heat retention and surface safety while minimizing external thermal drift.
• High-purity alumina fiber insulation ensures low thermal mass, rapid heating/cooling response, and long service life under cyclic thermal stress.
• 30-segment programmable PID temperature controller enables precise ramp-hold-cool profiles; optional Eurotherm 3504 controller supports LabVIEW integration and advanced data logging.
• KF25 vacuum port on right flange and 1/4″ VCR-style gas inlet on left flange allow seamless connection to mechanical pumps and regulated gas supply systems.
• Integrated mechanical pressure gauge (–0.1 to 0.15 MPa range) provides real-time process pressure monitoring; optional digital corrosion-resistant vacuum gauge (3.8×10⁻⁵–1125 Torr) offers wide-range, gas-independent measurement.
• Optional water-cooled hinge flange (5-inch) enables safe operation up to 1100°C by suppressing thermal creep at the seal interface — critical for extended high-temperature vacuum cycles.
• Over-temperature cutoff and thermocouple break detection comply with IEC 61000-6-2/6-4 EMC standards and support GLP-compliant lab documentation requirements.

Sample Compatibility & Compliance

The OTF-1200X-5S accommodates substrates up to 100 mm (4-inch) in diameter and supports diverse sample geometries including wafers, powders, pellets, fibers, and coated foils. Quartz tube compatibility extends to inert, reducing (H₂, Ar/H₂), and oxidizing (O₂, air) atmospheres — provided gas flow remains below 200 SCCM to prevent thermal shock to the tube wall. For vacuum applications, maximum allowable internal pressure is limited to 0.02 MPa (200 kPa) absolute; operation above 1000°C requires atmospheric-equilibrated conditions to avoid quartz devitrification or mechanical failure. All electrical components rated above 24 V meet UL, MET, and CSA safety standards. CE marking confirms conformity with EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU. Optional TÜV or CSA single-unit certification is available upon client request and cost assumption.

Software & Data Management

Standard control firmware supports RS485/Modbus RTU communication for integration into centralized lab automation systems. With the optional MTS02-B module, users gain PC-based temperature program editing, real-time curve visualization, and CSV export of time-temperature-pressure datasets. When paired with Eurotherm 3504, the system complies with FDA 21 CFR Part 11 requirements via configurable user access levels, electronic signatures, and audit-trail-enabled parameter change logging — essential for GMP-regulated materials development workflows. Data timestamps are synchronized to NTP servers when connected to institutional networks, ensuring traceability across multi-instrument experiments.

Applications

• Semiconductor device fabrication: Rapid thermal annealing (RTA) of Si, GaAs, and 2D material heterostructures.
• Energy materials research: Thermal treatment of Li-ion battery cathodes (e.g., NMC, LFP), perovskite precursors, and MOF-derived carbons.
• Catalysis science: In situ calcination and reduction of supported metal nanoparticles under controlled gas mixtures.
• Advanced ceramics: Binder burnout, densification sintering, and phase transformation studies of ZrO₂, Al₂O₃, and SiC composites.
• Nanomaterial synthesis: Vapor-phase growth of carbon nanotubes and transition metal dichalcogenides via CVD.

FAQ

What is the maximum recommended operating time at 1000°C?
Continuous operation at 1000°C is not advised. The furnace is rated for ≤1 hour at this temperature to preserve quartz tube integrity and thermal insulation performance.
Can the furnace be used under high vacuum (<10⁻³ Torr)?
No — standard configuration achieves ~10⁻² Torr with a mechanical pump. For higher vacuum, a turbomolecular pumping station and metal-sealed flanges (e.g., CF-63) must be added separately.
Is the quartz tube included with the system?
Yes — one high-purity fused quartz tube (130 mm OD × 120 mm ID × 640 mm L) and two alumina end plugs are supplied as standard. Optional quartz end plugs are available for ultra-high-purity applications.
Does the furnace support inert gas purging before vacuum evacuation?
Yes — the dual-port flange design allows sequential gas purge (via left inlet) followed by vacuum draw (via right KF25 port), minimizing oxygen residue during sensitive oxidation-sensitive processes.
What safety interlocks are built into the system?
Hardware-level over-temperature cutoff, thermocouple failure detection, door-open thermal shutdown, and pressure-relief valve integration (when used with optional safety manifold) collectively satisfy EN 61000-6-2 immunity and EN 61000-6-4 emission requirements.