OTF-1200X-IV Four-Zone Split Tube Furnace with 47″ Heating Zone and Optional Quartz Tubes up to 1200°C
The OTF-1200X-IV is engineered to support advanced thermal processing tasks such as annealing, diffusion, and sintering of samples in various controlled gas atmospheres. Its design addresses the need for a large uniform temperature zone, enabling consistent heat treatment over extended sample lengths.
This tube furnace features a total heating zone length of 1200 mm (47 inches), divided into four independently controlled zones of 300 mm each. This configuration allows the creation of a uniform temperature zone up to 36 inches long within ±5°C, ensuring precise thermal uniformity for sensitive processes.
Key Features
- Four-zone split tube design with pneumatic cylinders for easy top cover operation.
- Optional quartz tubes with inner diameters of 8″, 10″, or 14.5″ and lengths up to 73″ for accommodating various sample sizes.
- Includes stainless steel 304 vacuum flanges with double high-temperature silicone O-rings and water cooling jackets for vacuum sealing.
- Equipped with three programmable digital temperature controllers using K-type thermocouples, providing ±1°C accuracy.
- Maximum heating temperature of 1200°C with continuous operation up to 1100°C; suitable for vacuum operation below 1000°C.
- PID automatic control with 30 programmable segments for precise heating/cooling rates and dwell times.
- RS485 communication port and software included for remote operation and monitoring.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | OTF-1200X-IV |
| Heating Zone Length | 1200 mm total (4 zones × 300 mm each) |
| Quartz Tube Options (ID × Length) | 8.1″ × 60″ (206 mm × 1524 mm), 10.6″ × 51″ (269 mm × 1295 mm), 14.6″ × 73″ (371 mm × 1860 mm) |
| Maximum Temperature | 1200°C (continuous up to 1100°C) |
| Temperature Accuracy | ±1°C with K-type thermocouples |
| Temperature Controllers | 3 digital PID controllers, 30 programmable segments, over-temperature protection |
| Power Supply | AC 208-240V, Three Phase, 50/60 Hz (50A breaker required) |
| Power Consumption | 24 kW max |
| Vacuum Capability | Vacuum level down to 10⁻² torr (mechanical pump) and 10⁻⁵ torr (turbopump) |
| Furnace Insulation | High-purity fibrous alumina with quartz disc thermal blocks |
| Cooling | Double-layer steel case with two cooling fans |
Typical Applications
Ideal for semiconductor annealing, material diffusion studies, sintering ceramics, and other high-temperature processes requiring controlled atmospheres and precise temperature uniformity over extended sample lengths.
Configuration & Operating Notes
The furnace includes vacuum sealing flanges with pressure gauges and ball valves for immediate use. Optional accessories include vacuum pumps, digital vacuum gauges, and gas mixing/delivery systems to enhance process control. The top split cover is pneumatically operated for ease of access. Safety features include over-temperature alarms and thermocouple failure protection. Power cord is supplied without a plug; installation requires a 50A breaker.
