OTF-1100X-III-VT Large Vertical Tube Furnace with 1200°C Max Temperature, 1000mm Heating Length, and Vacuum Flanges for Annealing and Sintering
The OTF-1100X-III-VT is engineered for advanced laboratory processes requiring precise high-temperature treatment of materials in a controlled atmosphere. Its vertical tube configuration accommodates large quartz tubes, enabling uniform heating for annealing, diffusion, and sintering applications. The furnace supports vacuum or low-pressure environments, essential for reducing contamination and enabling specialized material processing.
This model integrates three independently programmable heating zones spanning a total length of approximately 1000 mm, with a stable constant temperature zone of about 350 mm. The maximum operating temperature reaches 1200°C, controlled by Eurotherm controllers with high accuracy. The furnace includes vacuum sealing flanges and high-temperature silicon O-rings to maintain vacuum levels down to 10^-2 torr, facilitating processes under reduced pressure.
Key Features
- Vertical tube furnace with a 12″ diameter heating chamber and double-layer steel casing with air cooling.
- Three heating zones totaling 1000 mm length, each independently controlled with ±0.1°C accuracy.
- Maximum temperature up to 1200°C with silicon carbide heating elements (36 pcs) and max heating/cooling rate of 10°C/min.
- Vacuum sealing system includes hinged stainless steel flanges, silicon O-rings, needle valves, and KF40 vacuum port with gauge.
- Supports 8″ or 11″ outer diameter quartz tubes, 71″ length, made from high purity quartz.
- Includes ceramic tube blocks to reduce heat radiation and improve energy efficiency.
- Equipped with Eurotherm controllers featuring RS485 digital communication and PC software for programming.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | OTF-1100X-III-VT |
| Heating Zones | 3 zones (330 mm each), total ~1000 mm |
| Constant Temperature Zone Length | 350 mm (±3°C uniformity) |
| Max Temperature | 1200°C |
| Heating Elements | 36 Silicon Carbide (SiC) elements |
| Heating/Cooling Rate | Up to 10°C/min |
| Temperature Controllers | 3 Eurotherm controllers, ±0.1°C accuracy, RS485 communication, PC software included |
| Quartz Tube Options | 8″ or 11″ outer diameter, 71″ length, high purity quartz |
| Vacuum Flanges | Stainless steel hinged flanges with silicon O-rings, needle valves, KF40 port with vacuum gauge |
| Power Supply | Three phase 208V AC (50/60 Hz), optional 3 phase 380V, max 30 kW |
| Insulation | Fibrous alumina liner with ceramic tube blocks |
| Cooling | Air cooled double-layer steel casing |
Typical Applications
Ideal for high-temperature annealing, sintering, and diffusion treatments of materials requiring controlled atmosphere and vacuum conditions. Commonly used in materials science research, semiconductor processing, and advanced ceramics manufacturing.
Configuration & Operating Notes
The furnace includes ceramic tube blocks that must be fully inserted before heating to minimize heat radiation and improve energy efficiency. Vacuum sealing flanges come with silicon O-rings and needle valves for controlled vacuum environments. A thermal couple insert port on the right flange facilitates temperature calibration.
Quartz tubes are fragile and must be handled carefully; warranty does not cover breakage. The furnace is designed for vacuum or low-pressure operation below 0.2 bar absolute pressure. Gas flow rates should be limited to under 200 SCCM to avoid thermal shock to the quartz tube. A two-stage pressure regulator is recommended for gas supply to maintain safe operating pressures below 3 PSI.
Optional accessories include a calibration kit with a K-type thermocouple and temperature calibrator, KF40 vacuum right-angle valve for easier pump connections, turbopumps for high vacuum down to 10^-5 torr, and quartz boats for sample handling. The furnace can be customized into a vertical configuration upon request.
