OTF1200XIIH2 1100°C Hydrogen Gas Tube Furnace with Dual Heating Zones and Integrated H2 Leak Detector
The OTF1200XIIH2 furnace is engineered for precise heat treatment of materials that are sensitive to oxidation, utilizing a controlled hydrogen atmosphere. It is particularly suited for applications requiring a stable and safe environment to prevent oxidation during high-temperature processes. The furnace incorporates two independently controlled heating zones, allowing users to create either a temperature gradient or maintain uniform temperature distribution across the sample area.
This model operates continuously up to 1100°C, with a short-term capability reaching 1200°C. The heating zones each cover 200 mm, totaling 400 mm of heating length, ensuring ample space for various sample sizes. The furnace chamber includes a high-quality quartz tube available in 60 mm or 80 mm diameter options, with fibrous ceramic tube blocks supplied to minimize heat radiation losses. For enhanced vacuum efficiency and cleanliness, optional quartz blocks are available.
Key Features
- Dual heating zones with precise PID temperature control and auto-tuning for stable operation and less than ±1°C fluctuation during dwell.
- Integrated Honeywell UL-approved hydrogen gas detector triggers automatic shutdown of hydrogen supply and heating elements upon leak detection.
- Includes flange fixtures with 1/4″ tube fittings and mechanical valves on both ends for safe gas handling and easy sample loading.
- Equipped with GSL-KR200 flammable gas control and disposal device featuring pressure gauge and flow meter for accurate hydrogen flow management.
- Double-layer steel casing with air cooling enhances durability and operational safety.
- Optional PC remote control available via communication module for automated process management.
- Over-temperature protection and broken thermocouple alarms enable unattended operation with safety assurance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Power Supply | 220 VAC, single phase, 50/60 Hz |
| Maximum Power | 3 kW (requires 20A breaker) |
| Working Temperature Range | 100°C to 1100°C continuous; up to 1200°C for less than 1 hour |
| Maximum Heating Rate | ≤ 20°C/min |
| Tube Diameter Options | 60 mm or 80 mm high-quality quartz tube |
| Heating Zones | Two zones, each 200 mm length, total 400 mm heating length |
| Temperature Uniformity | ±1°C over 150 mm per zone; ~250 mm uniformity when zones matched |
| Temperature Control | Built-in PID with auto-tune, over-temperature protection, broken thermocouple alarm |
| Hydrogen Leak Detection | Honeywell Sensepoint detector with automatic shutdown at 20% LEL alarm |
| Gas Delivery | Separate hydrogen and inert gas lines with solenoid valves; includes gas disposal device with flow meter |
| Safety Features | Flange fixtures, quartz tube covers, automatic valve shutoff, heating element power cutoff |
Typical Applications
Ideal for heat treating oxidation-sensitive materials such as metal powders, thin films, and ceramics under controlled hydrogen atmospheres. Suitable for research and development in materials science, semiconductor processing, and chemical synthesis requiring precise temperature gradients or uniform heating.
Configuration & Operating Notes
The furnace must be installed under a fume hood (not included) for safe operation. Two fibrous ceramic tube blocks are supplied and must be fully inserted before heating to block heat radiation. Optional quartz blocks can be purchased for improved vacuum performance. Flanges with additional thermocouple feedthroughs or KF25 ports are available as options for in-situ measurements or vacuum connections. Water-cooled flanges are recommended if thermal blocks are not used. The gas disposal device safely burns exhausted hydrogen. A mandatory safety operation training is required prior to purchase to ensure proper handling of hydrogen hazards.
