OTF-1600X-III Three-Zone Split Tube Furnace with 80mm Diameter Alumina Tube and Vacuum-Sealed Flange
The OTF-1600X-III is engineered for precise thermal processing tasks requiring controlled atmospheres and high temperatures up to 1600°C. Its split-able design allows convenient access and tube exchange, facilitating multi-purpose applications in research and industrial laboratories. The furnace is optimized for use under vacuum or low-pressure conditions, making it suitable for sensitive material treatments and chemical vapor deposition processes.
This model incorporates three independently controlled heating zones, each 200 mm in length with 20 mm spacing, totaling 600 mm of heating length. The central constant temperature zone extends 350 mm with a temperature stability of ±2°C. The heating elements are 1600°C grade silicon carbide rods housed within an 80 mm outer diameter alumina tube, which is vacuum-sealed with a flange to maintain controlled atmospheres. Temperature is monitored by three S-type thermocouples and regulated by a microprocessor-based self-tuning PID controller, achieving ±1°C accuracy without overshoot.
Key Features
- Three-zone split tube design with independent temperature control for flexible thermal profiles.
- 80 mm OD alumina processing tube, 1200 mm length, compatible with Ø50, Ø60, and Ø100 mm tubes upon request.
- Kanthal 1650°C grade silicon carbide heating elements for reliable high-temperature operation.
- Microprocessor-based PID controllers with auto-tuning and 30 programmable segments for ramping, dwelling, and cooling.
- Vacuum-sealed flange enabling operation under vacuum levels down to 10-5 torr with molecular pumps.
- Built-in over-temperature and thermocouple failure alarms for enhanced safety.
- Optional PC control module and Eurotherm 3204 temperature controller for advanced temperature management.
Technical Specifications
| Parameter | Specification |
|---|---|
| Power Input | 9.0 kW |
| Working Voltage | 208-240 VAC, 50/60 Hz |
| Maximum Working Temperature | 1550°C |
| Continuous Working Temperature | 1500°C |
| Recommended Heating Rate | <10°C/min |
| Processing Tube Dimensions | Alumina tube 80 mm OD x 74 mm ID x 1200 mm length |
| Heating Zones | Three zones, each 200 mm length with 20 mm spacing; total 600 mm heating length |
| Constant Temperature Zone Length | 350 mm ±2°C stability |
| Heating Elements | 24 pcs silicon carbide rods (12 mm diameter x 150 mm heating length x 368 mm total length) |
| Temperature Sensors | 3 pcs S-type thermocouples |
| Temperature Control Accuracy | ±1°C with PID control |
| Vacuum Capability | 10-2 torr with mechanical pump; 10-5 torr with molecular pump |
| Power Cable | 10 feet long, 10-3 AWG UL-approved heavy-duty cable (plug not included) |
Typical Applications
Ideal for high-temperature material synthesis, annealing, sintering, and chemical vapor deposition under controlled atmospheres. Suitable for research in ceramics, semiconductors, and advanced materials requiring precise temperature profiles and vacuum conditions.
Configuration & Operating Notes
The furnace includes two thermal blocks for sample placement inside the alumina tube. Flange supports to prevent tube rotation are available as optional accessories. Customers are responsible for on-site installation of silicon carbide heating rods following the provided instructions due to their fragility during shipping. The system is designed for vacuum and low-pressure operation below 0.02 MPa; use of graphite crucibles inside the alumina tube is not recommended. A two-stage pressure regulator must be installed on gas cylinders to limit pressure below 3 PSI for safe operation.
Optional add-ons include a PC control module with software for temperature profile editing and data logging, Eurotherm 3204 temperature controllers with ±0.1°C accuracy, and a laptop pre-installed with control software and Windows 10. The power plug is not included and must be sourced separately.
