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24" Three Zones Split Tube Furnace with Optional Quartz Tube & Flange ( 60 - 130mm, 1200°C Max. ) - OTF-1200X-III-S-UL

Transported by LTL Freight (Truck)

Product Options

UL/CSA certification:
vacuum accessories:
furnace chamber size:


Upgrade to Eurotherm Temp Programmer (three zone) Upgrade + 15" Laptop + USB-to-RS485 Cable
OTF-1200X-III-S is CE/UL/CSA certified* 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.
Compliance standard can be selected in certification options bar. )

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 higher achievable vacuum.
  • Furnace can be separated from 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 1219 L  (mm)
Model: OTF-1200X-III-S-UL-80
80 O.D x 72 I.D x 1219 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 using under vacuum and low pressure < 0.12 Mpa (absolute pressure)
Heating temperature
  • Max. Heating Temperature: 1200°C
  • 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 programs 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 one side flange
  • Vacuum level can reach 10E-2 torr by quality mechanical vacuum pump and 10E-5 torr by molecular pump
  • Optional:
    • You may choose hinged type flange ( see pic below middle ) to make sample loading at easy.
    • You may order digital molecular pump for  faster and better vacuum
    • You may order flange support to avoid tube rotating ( click Pic below right )
750mm(L) x525mm(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 & WiFi Control(Optional)
  • Brand new laptop with Microsoft Window 10 and Microsoft Office 2013 (30 days free trial) for immediate use.
  • Labview Based Temperature Control System (EQ-MTS01) enables user to edit temperature profile, manage heat-treatment recipe, record and plot data for MTI furnaces.
  • A wireless remote control provides up to 300 meters operating range.
  • Above features are available upon request at an extra cost (up to $1,000). Please contact us for more information.
  • Note: 
    The software is only compatible with MTI’s Yudian Temperature Controller


  • CE/UL/CSA Certificate
  • Please select the certificate in options bar:
    • CE Certificate only - CE mark only
    • CE Certificate & UL/CSA ready to pass UL/CSA certificate at extra cost
    • UL Certificate -  UL apprval (UL 61010), 
Application Notes

Operation Istructions               

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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3. The prices listed are subject to change without notice.