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24"L 3-Zone Tube Furnace w/ Optional Quartz Tube & Flange (60 - 130mm, 1200C Max.) -OTF-1200X-III-S-UL

Transported by LTL Freight (Truck)

Product Options

UL/CSA certification:
furnace chamber size:


Upgrade to Eurotherm Temp controller( 3 zone)+15" Laptop+ USB Cable
OTF-1200X-III-S is 24" Long ( 6"+12"+6")  split-able three-zone tube furnace with quartz tube (size selectable) and conventional flange. Three 30 segments temperature controllers are installed with K-type thermal couples. Microprocessor-based self-tuning PID provides excellent control with no overshooting and  +/- 1 °C accuracy. It is an excellent furnace for sample annealing, diffusion, and sintering in the various gas atmosphere up to 1200°C.

Furnace structure

  • Double-layer steel case with two cooling fans which ensure low surface temperature;
  • Energy-saving high purity fibrous alumina insulation; 
  • Two fibrous ceramic tube blocks are included for blocking heat radiation from inside of the tube. (Ceramic blocks must be fully inserted into the furnace chamber before heating).
  • Quartz block (Optional) is ideal for more cleanness and a higher achievable vacuum.
  • The furnace can be separated from the temperature controller and place it on remote location

            Click here to choose a crucible

Rated voltage
AC 208-240V Single Phase, 50/60 Hz (30A breaker required; Powder cord is included without plug)
Power consumption
5KW Max.
Heating elements
Fe-Cr-Al Alloy doped by Mo
Heating zone length

  • Three zones: 610mm (24") in total
  • Z1 - Z2 - Z3:152.4mm (6") + 304.8mm (12") + 152.4mm (6")
  • +/-1ºC Constant Temperature Zone: 260 mm length
  • +/-2ºC Constant Temperature Zone: 480 mm length (click the pic below for detail)
Fused Quartz Tube 
Quartz Tubes 
Model: OTF-1200X-III-S-UL-60
60 O.D x 55 I.D x 1200 L  (mm)
Model: OTF-1200X-III-S-UL-80
80 O.D x 72 I.D x 1200 L (mm)
Model: OTF-1200X-III-S-UL-100
101 O.D x 92 I.D x 1200 L (mm)
Model: OTF-1200X-III-S-UL-5
130 O.D x 122 I.D x 1200 L
Warning: The tube furnaces with quartz tube are designed for use under vacuum and low pressure < 0.12 Mpa (absolute pressure)
Heating temperature
  • Max. Heating Temperature: 1200°C (<1 hour)
  • Continuous Heating Temperature: 1100°C
  • Max. Heating Rate: 20°C/min
Temperature Controllers 

  • Three MTE certified Temperature controller with 30 programmable segments 
  • Built-in PID Auto-Tune function with overheating & broken thermocouple protection.
  • Over-temperature protection and alarm allow for operation without an attendant.
  • +/- 1 ºC temperature accuracy.
  • Three K-type thermocouples (one for each zone).
  • RS485 Communications Port.           
European Temperature Controllers (optional upgrade)
  • 1 heating channel
  • 1 program of 8 or 24-segment
  • Alarm Relay: Form 'A' and Form ‘C’ built-in 
  • Digital Communications: RS485
  • Temperature Accuracy:  ±  0.1ºC
  • Recipes: Using a PC tool recipes can be created that can be used to change the operating parameters of the 3000 simply by selecting a new recipe via the HMI. This is very useful where multiple products are processed using the same controller but require different parameters to be set.
Vacuum Flange and Gauge
  • One pair of SS 304 vacuum flange with double high-temperature silicone O-ring  is Included
  • Default flange with 1/4'' Bard fittings, 1/4'' tube feedthrough port (for 1/4" O.D thermocouple insert) and a KF25 vacuum portclick bottom left picture to see details )
  • One Vacuum/ pressure gauge is installed on one side flange
  • The vacuum level can reach 10E-2 torr by the quality mechanical vacuum pump and 10E-5 torr by a turbo pump
  • Optional:
    • You may choose a hinged type flange ( see pic below middle ) to make sample loading at easy.
    • You may order the digital molecular pump for a faster and better vacuum
    • You may order flange support to avoid tube rotating ( click Pic below right )
800mm(L) x435mm(W) x 670 mm(H)
Net Weight
~70 kg
Shipping Dimensions 55"(L) x 45"(W) x 45"(H)
Shipping Weight 340lbs
One-year limited warranty with lifetime support. (Consumable parts such as processing tubes, o-rings, and heating elements are not covered by the warranty, please order the replacements at related products below.)
Laptop, software &l(Optional)
  • Brand new laptop with Microsoft Windows 10 and Microsoft Office 2013 (30-day free trial)  9ncluded
  • Labview Based Temperature Control System (EQ-MTS01) enables users to edit temperature profiles, manage heat-treatment recipes, and record, and plot data for MTI furnaces.
  • A wireless remote control provides up to 300 meters of operating range.
  • CE certified
  • NRTL or CSA certification is available upon request at the extra cost      
Application Notes

Operation Demo Video               

OTF-1200X-III-S-4 OTF-1200X-III-S-130
Fused quartz tube
1 pc

EQ-QZTube-60GE-1200 EQ-QZTube-80D-48 EQ-QZTube-100


Alumina fiber foam tube block
2 pcs

EQ-F-T-block-52 EQ-F-T-block-70 EQ-F-T-block-92 EQ-F-T-block-125
Hook for moving the sample 1 pc
EQ-FLG-kit-2 EQ-FLG-kit-2 EQ-FLG-kit-2 EQ-FLG-kit-2
Metric Hex-wrenches
1 set

5 Vacuum flanges 1 pair EQ-FL-60 EQ-FL-80 EQ-FL-101 EQ-FL-125

Part No.
Quick Link
EQ-MTS02 Computerized Temperature Control System
High vacuum station (Mechanical pump + turbo molecular pump.)
Gas mix station (Float flow meter / Mass flow meter) (2, 3, 4channels selectable)
Compact Flow Meter (float flow meter/mass flow meter)
EQ-QBlock-90 90mm O.D heat-insulating quartz block 
Quartz Boats /crucible /container /sample holder
Heavy Duty Mobile Car for All MTI Tube and Box Furnaces

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