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- 1200°C Laboratory Tube Furnaces
Ai STF1200 series split tube furnaces feature the famous Kanthal (Sweden) spiral wire coils embedded in Mitsubishi (Japan) high quality grade 1500 alumina fiber insulation. A double walled steel internal housing helps minimize heat loss to exterior surface.
Precise temperature control is provided by the Eurotherm 3204 programmable controller, offering 40 programmable segments and an advanced self-tuning PID algorithm that automatically optimizes heating performance while minimizing temperature overshoot. This combination delivers highly accurate and repeatable thermal processing for demanding laboratory and production environments.



Features
Compact, portable and lightweight design.
Split furnace chamber for fast and easy tube access.
Standard package includes set of stainless steel vacuum sealing flanges with valves and pressure meter.
Microprocessor based self-tuning PID control provides optimum thermal process with minimal overshoot.
Multiple atmosphere processes in a single cycle are possible (ex: binder burn out in air and parts sintering under rough vacuum or inert gas environment.)
Built-in ammeter and dual voltmeters for easy monitoring and troubleshooting.
Built-in computer interface.
Long life type K thermocouple.
ETL and CE certified, standard
Safety
Overheat protection shuts down the furnace if temperature is outside of acceptable range (refer to controller's manual) or when the thermocouple is broken or malfunctions.
Power failure protection resumes furnace operation right after the point of failure when power is reestablished.
Warning! NEVER fill furnace with explosive gases, including Hydrogen, Carbon Monoxide and Methane.
1-ZONE Specifications
| Electrical requirements | 220-240VAC, 50/60 Hz, single phase |
| Tube material | Quartz |
| Maximum working temperature | 1200°C |
| Maximum constant working temperature | 1100°C |
| Constant working temperature under vacuum | 1000°C |
| Minimum working temperature | Ambient |
| Rated vacuum pressure | 0.001 Pa / 0.0075 millitorr / 0.00001 mbar |
| Rated positive pressure | 20 kPa / 150 torr / 3 psi |
| Heating element type | Kanthal (Sweden) resistance coil wire |
| Thermocouple type | K |
| Refractory lining | Mitsubishi (Japan) high quality 1500 grade fiber alumina |
| Temperature controller | Eurotherm 3204 with 4 programs and 40 segments (ie. 4 x 10 segments or 2 x 20 segments) |
| Maximum heating & cooling rate | < 30°C / min |
| Heating zone length | 400 mm |
| Constant temperature zone length | 250 mm |
| Temperature controller precision | +/- 1°C |
| Vacuum sealing flange kit | Stainless steel vacuum sealing flanges with one vacuum gauge, two valves and four thermal ceramic blocks. |
| Gas inlet/outlet | 1/4" (6.35mm) hose barb with 1/4" BSPT (British Standard Pipe Thread) |
| RCM & CE compliance | Yes |
2-ZONE Specifications
| Electrical requirements | 220-240V, 50/60 Hz, Single phase |
| Tube material | High purity quartz |
| Min. working temperature | Ambient |
| Max. working temperature | Zone1/Zone2: 1200°C |
| Max. constant working temperature | Zone1/Zone2: 1100°C |
| Constant working temperature under vacuum | 1000°C |
| Rated vacuum pressure | 0.001 Pa / 0.0075 millitorr / 0.00001 mbar |
| Rated positive pressure | 20 kPa / 150 torr / 3 psi |
| Refractory lining | Mitsubishi (Japan) high quality 1500 grade fiber alumina |
| Heating element type | Zone1/Zone2: Kanthal (Sweden) coil wire |
| Thermocouple type | Zone1/Zone2: K |
| Temperature controller | Eurotherm 3204 with 4 programs and 40 segments (ie. 4 x 10 segments or 2 x 20 segments) |
| Max/recommended heating rate | 20°C/min 10°C/min |
| Heating zone length | Zone1: 200 mm Zone2: 200 mm |
| Constant temp zone length | Zone1: 100 mm Zone2: 100 mm |
| Temperature controller precision | +/- 1°C |
| Vacuum level (cold) | 0.1 Pa |
| Vacuum sealing flange kit | Stainless steel vacuum sealing flanges with one vacuum gauge, two valves and four thermal ceramic blocks. |
| CE compliant | Yes |
3-ZONE Specifications
| Electrical requirements | 220-240VAC, 50/60 Hz, Single phase |
| Tube material | Quartz |
| Min. working temperature | Ambient |
| Max. working temperature | Zone1/Zone2/Zone3: 1200°C |
| Max. constant working temperature | Zone1/Zone2/Zone3: 1100°C |
| Constant working temperature under vacuum | Zone1/Zone2/Zone3: 1000°C |
| Rated vacuum pressure | 0.001 Pa / 0.0075 millitorr / 0.00001 mbar |
| Rated positive pressure | 20 kPa / 150 torr / 3 psi |
| Refractory lining | Mitsubishi (Japan) high quality 1600 grade fiber alumina |
| Heating element type | Zone1/Zone2/Zone3: Kanthal (Sweden) resistance coil wire |
| Thermocouple type | Zone1/Zone2/Zone3: K |
| Temperature controller | Eurotherm 3204 with 5 on-board process recipes (48 parameters per recipe) |
| Max heating rate | 20°C/min |
| Recommended heating rate | 10°C/min |
| Heating zone length | Zone1: 200 mm Zone2: 200 mm Zone3: 200 mm |
| Constant temperature zone length | Zone1: 100 mm Zone2: 100 mm Zone3: 100 mm |
| Temperature controller precision | +/- 1°C |
| Vacuum sealing flange kit | Stainless steel vacuum sealing flanges with one vacuum gauge, |
| two valves and four thermal ceramic blocks. | |
| CE compliance | Yes |
Size comparison 1-zone
| Tube size (OD x length) | 60mm x 1m | 100mm x 1m | 150mm x 1m | 200mm x 1m | 250mm x 1m |
| Maximum output | 2.5 kW | 3.5 kW | 5 kW | 6 kW | 8 kW |
| Electrical requirements | 11 AMP | 15 AMP | 22 AMP | 27 AMP | 36 AMP |
| Furnace dimensions (LxWxH) | 610x380x510mm | 610x430x580mm | 610x460x610mm | 660x530x710mm | 660x530x710mm |
| Shipping dimensions (LxWxH) | 1240x660x900mm | 1240x660x900mm | 1240x660x940mm | 1270x710x1020mm | 1270x710x1020mm |
| Shipping weight (kg) | 118 | 154 | 204 | 227 | 295 |
Size comparison 2-zone
| Specification | 60 mm Tube | 100 mm Tube | 150 mm Tube | 250 mm Tube |
| Tube size (OD × L, mm) | 60 × 1000 | 100 × 1000 | 150 × 1000 | 250 × 1500 |
| Heating zones (mm) | 205 + 205 | 205 + 205 | 205 + 205 | 400 + 400 |
| Maximum output (kW) | 3 | 4 | 5.5 | 16 |
| Unit dimensions (L × W × H, mm) | 1320 × 610 × 710 | 1320 × 610 × 710 | 1320 × 660 × 760 | 1805 × 710 × 1015 |
| Shipping dimensions (L × W × H, mm) | 1525 × 815 × 915 | 1525 × 815 × 915 | 1525 × 865 × 965 | 2005 × 915 × 1220 |
Size comparison 3-zone
| Specification | 60 mm Tube | 100 mm Tube | 150 mm Tube | 250 mm Tube |
| Tube size (OD × length) | 60 × 1300 mm | 100 × 1300 mm | 150 × 1300 mm | 250 × 1900 mm |
| Heating zones | 205 + 205 + 205 mm | 205 + 205 + 205 mm | 205 + 205 + 205 mm | 400 + 400 + 400 mm |
| Maximum output | 1.5 kW × 3 | 2 kW × 3 | 2.5 kW × 3 | 8 kW × 3 |
| Unit dimensions (L × W × H) | 1525 × 610 × 710 mm | 1525 × 610 × 710 mm | 1525 × 660 × 760 mm | 2515 × 760 × 865 mm |
| Shipping dimensions (L × W × H) | 1725 × 815 × 915 mm | 1725 × 815 × 915 mm | 1725 × 865 × 965 mm | 2745 × 965 × 1065 mm |




