Laboratory 1200C Single-Zone High-Vacuum Tube Furnace With High-purity Quartz Glass Tube
Technical Parameters
This series 1200℃ high-vacuum tube furnace integrates the control system and furnace chamber into one unit. The furnace lining is made of vacuum-formed high-purity alumina lightweight aggregate material.
It adopts high-temperature alloy resistance wire as the heating element. This special equipment is specially developed for sintering, melting, analysis and small-batch production of ceramics, metallurgy, electronics, glass, chemical industry, machinery, refractory materials, new material development, special materials, building materials, metals, non-metals and other compound materials in laboratories of institutions of higher learning, research institutes as well as industrial and mining enterprises.
The control panel is equipped with an intelligent temperature controller, main power switch, main heating start/stop button, voltmeter, ammeter and computer interface for real-time monitoring of the system operating status. The product adopts reliable integrated circuits with good environmental adaptability and strong anti-interference capability. The surface temperature of the furnace shell is ≤45℃ at the maximum working temperature, greatly optimizing the working environment. It adopts microcomputer program control with programmable curve, fully automatic temperature rise and cooling. Temperature control parameters and programs can be modified during operation, featuring high flexibility and simple operation.
Temperature control accuracy: ≤±1℃ without overshoot; Constant temperature accuracy: ±1℃. Fast heating rate with a maximum nonlinear heating rate of ≤15℃/min.
The entire furnace chamber is made of high-purity alumina material, featuring high service temperature, low heat storage, excellent thermal shock resistance, no cracking, no slag shedding and superior thermal insulation performance (energy saving efficiency over 60% compared with traditional electric furnaces). With a reasonable double-layer furnace shell structure and air cooling heat dissipation, it greatly shortens the test cycle.
Product Features
Openable Furnace Chamber
Control accuracy: ±1℃
Easy operation with programmable function, PID self-tuning, automatic temperature rise, constant temperature and cooling without on-duty monitoring. Optional computer communication configuration enables remote furnace operation including start, stop, heating pause, heating curve setting, curve storage and historical curve query. Free supporting software is available via the computer control system.
Furnace tube made of high-purity quartz glass (SiO₂≥99.9%)
Pure titanium metal flange sealing with double rubber rings
Furnace body surface temperature close to room temperature
Dual-circuit protection system
Imported refractory materials with excellent thermal insulation and high temperature resistance
Maximum vacuum degree: 10⁻³ Pa
Compatible with multiple atmospheres (oxygen, nitrogen, argon, hydrogen, etc.)
Technical parameters
Parameter | 1200 ℃ |
Model | GWDL-GA |
Heating Chamber Size | Diameter 150mm * Effective Heating Zone 300mmFurnace Tube Length 950mm |
Furnace Tube Material | High-purity Quartz Glass |
Voltage | 380V |
Parameter Category | 1200 ℃ |
Power | 6 kW |
Maximum Service Temperature | 1200 ℃ |
Long-term Service Temperature | 1150 ℃ |
Control Range | RT-1200 ℃ |
Temperature Measuring Element | K-type thermocouple, measuring range 0-1320 ℃ |
Heating Element Installation Position | Around the furnace tube |
Temperature Control Accuracy | ±1 ℃ (Integrated circuit control, no overshoot) |
Furnace Temperature Uniformity | ≤ ±5 ℃ (Depends on furnace chamber size; multi-point control can be adopted for large furnace chambers to achieve better furnace temperature uniformity) |
Heating Rate | Adjustable from 1℃/h to 15℃/min (Non-linear) |
Heating Element | High-temperature alloy resistance wire is adopted as heating element |
Accessible Atmosphere | Able to pass various gases (Oxygen, Nitrogen, Argon, Hydrogen, etc.) |
Vacuum Component Part | Vacuum Component Part |
Vacuum Pump | Mechanical pump + molecular pump unit |
Vacuum Degree | ≤ 10⁻³Pa |
Pressure Detection | One dual-pointer pressure gauge for positive pressure and negative pressure (Digital vacuum gauge and others optional) |
Valve | Imported stainless steel valve (Ordinary type, stainless steel type, solenoid valve optional) |
Flow Meter | Two mass flow meters of 0-300 mL/min |
Gas Pipeline | Special clean stainless steel pipe for gas |
Pressure Protection | To avoid risks caused by closed exhaust port, blocked exhaust port and excessive furnace tube pressure, this system is specially designed. Principle: The electric contact pressure gauge or pressure sensor acquires signals to drive the control module to close the electromagnetic air inlet valve, start the electromagnetic exhaust valve and alarm. So as to protect the normal operation of the furnace |
Furnace Chamber Opening Mode | Up-and-down hinge opening and closing |
Furnace Body | The furnace body is processed by CNC machine tool, and manufactured through polishing, grinding, pickling, phosphating, plastic powder spraying, high-temperature baking and other processes. With two-color matching, it has novel and beautiful appearance, and features oxidation resistance, acid and alkali resistance, corrosion resistance, high temperature resistance and easy cleaning |
Furnace Body Structure | The electric furnace adopts air-cooled double-layer furnace body structure. The efficient air-cooled guide partition enables overall cold air circulation of the furnace shell, and finally exhausts out of the furnace body after cooling the conductive strips of heating elements, avoiding high-temperature oxidation of heating element conductive strips and ensuring a good working environment |
Refractory Material | The furnace lining is made of vacuum-formed high-purity alumina lightweight aggregate material. Lightweight hollow sphere alumina plates are used at easily touched positions (furnace mouth, furnace bottom). It has high service temperature, low heat storage, resistance to rapid heating and cooling, no cracking, no slag dropping and good thermal insulation performance (energy-saving effect is more than 80% of old-fashioned electric furnaces) |
Thermal Insulation Material | Adopts three-layer thermal insulation: aluminum silicate fiber board, alumina fiber board, alumina (polycrystalline) fiber board. The energy-saving effect is more than 80% of old-fashioned electric furnaces |
Furnace Shell Temperature | Under long-term continuous operation, shell temperature is lower than 45 ℃ |
Protection | Adopts integrated modular control unit with accurate control precision. Dual-circuit control and dual-circuit protection are designed, with protection functions such as overshoot, over-regulation, under-regulation, thermocouple breakage, phase loss, overvoltage, overcurrent, overtemperature, current feedback and soft start |
Control | Adopts closed-loop thyristor module trigger control, phase-shift trigger control or zero-cross trigger mode. The output voltage, current or power is continuously adjustable, with constant voltage, constant current or constant power characteristics. The current loop is the inner loop and the voltage loop is the outer loop. When sudden load is applied or load current exceeds the current limit, the output current of the voltage regulator is limited within the rated current range to ensure normal operation of output and voltage regulator. Meanwhile, the voltage loop participates in regulation to keep the output current and voltage stable with sufficient regulation margin. Thus protecting the heating elements from impact of excessive current and voltage, achieving safe and reliable control effect and control precision |
Display Parameters | Temperature, temperature segment number, segment time, remaining time, output power percentage, voltage, current, etc. |
Buttons | Imported buttons with service life over 100,000 times and built-in LED indicator lights |
Temperature Curve Setting | Equipped with intelligent temperature controller, supporting standard PID, artificial intelligence APID, MPT and other regulation modes. It has self-tuning and self-learning functions with excellent control characteristics of no overshoot and no under-regulation. It has 30-segment program control function, realizing temperature rise and cooling control at any slope. It supports jump (cycle), operation, pause, stop and other programmable/operable commands, and allows modifying programs at any time during program operation. Adopts artificial intelligence regulation algorithm with curve fitting function to obtain smooth curve control effect |
Multi-curve Input | Group 1: 50 segments, Group 2: 24 segments, Group 3: 16 segments |
Computer Interface | RS485 RS232 USB |
Random Accessories | 2 heating elements, 2 sets of rod tools, 1 instruction manual, 1 certificate of conformity, 1 special crucible for tubular electric furnace, 2 heat insulation plugs, 2 sealing rings |
Main Included Accessories | The price includes vacuum flange, water-cooled flange and vacuum pump, excluding gas control. Gas control is customized according to customer requirements |
Warranty Scope and Period | One-year free warranty for electric furnace (excluding heating elements and furnace tube); Free replacement for heating elements with natural damage within three months |
