VS tube furnace adopt a 20, 30, 40, 50, 60,70,80, 90, 100, 110, & 120mm O.D 80% Pure Alumina  tube and a pair of stainless steel vacuum sealing flanges with needle valves & gauge allow heating samples under vacuum or gas flow conditions. The temperature of this tube furnace is controlled by a high precision digital controller which provides 51 programmable segments with +/- 1℃ accuracy. The maximum working temperature is 1400℃.

Options (specify these at time of order):-
  • A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
  • Over-temperature protection (recommended to protect valuable contents & for unattended operation)
  • A range of additional work tubes, end seals and work tube packages is available for use with modified atmosphere and/or vacuum
  • Vacuum packages with a choice of rotary vane pump or turbomolecular pump are available for furnaces with tube inner diameters of 40 mm and above
  • Wide choice of tube diameters and materials is available: eg quartz, ceramic, metal
  • Insulation plugs & radiation shields to prevent heat loss & improve uniformity
Ⅰ. Technical Specifications:-
Heated Lengths Single Zone 100, 150, 200, 250, 300mm
Max. temperature 1400 ℃ (<3 hours)
Working temperature 700-1300 ℃
Standard Temperature controlling PID automatic control via SCR (Silicon Controlled Rectifier)
power control with phase angle fired, current limiting resistor.
51 programmable segments for precise control of heating rate,
cooling rate and dwell time. Built in PID Auto-Tune function
with overheating & broken thermocouple broken protection.
Over temperature protection and alarm allows for operation
without attendant.
Optional of Temperature controlling Software (Furnace can be operated by PC by installing
a control software ) Touch screen temperature controller
Temperature accuracy ±1 ℃
Heating rate Heating rate<8℃/min
Thermocouple S type (Pt-Rh) with 99.7% purity Alumina tube
Heating element U type SiC heating element
Furnace Chamber There layers of ceramic fiber insulation materials
First layer: 1700℃ ceramic fiber board.
Second layer: 1430℃ ceramic fiber board.
Third layer: 1260℃ ceramic fiber board.
Furnace structure Double layer steel casing with dual cooling fan,
surface temperature below 60 ℃.
Optional Vacuum system Double stage rotary vane vacuum pump with magnetic
valve to prevent the oil absorbed to tube.
Self-expansion type double silicon ring flange, 304
stainless steel HCP. Needle valve + Mechanical
vacuum gauge + Discharge valve
Warranty One year limited warranty with lifetime support. (Consumable
parts such as heating elements and tubes are not covered by
the warranty, please order the replacement at related products)
ATTENTION: Any damages caused by the use of corrosive and acidic
gases are not under the coverage of One Year Limited Warranty.
Certifications CE
Ⅱ. Application Notes:-
Using Attentions Cooling rate shall also not exceed 5℃ /min. Toxic or
explosive gases are not recommended for use with this
furnace without necessary safety controls and supervision.
Small cracks may appear on the surface of the refractory
ceramics over extended use. The tube furnace is avoid
use vacuum above 1500℃, otherwise the tube will be
serious deformation.