Laboratory 900C Muffle Furnace Electric Box With Exhaust Gas Purification Unit
Technical parameters
Item | Technical Parameters |
Maximum operating temperature | 900°C |
Long-term operating temperature | 850°C |
Chamber dimensions | 850×750×750 |
Temperature control range | 100–900°C |
Temperature control accuracy | ±1°C |
Temperature uniformity | ±5°C |
Temperature sensor | K-type thermocouple |
Heating element material | High-temperature alloy resistance wire (fixed at both ends) |
Heating element installation | All around + bottom |
Heating zones | 3 zones: bottom + front/rear + left/right |
Heating rate | Max. 20°C/min (non-linear) |
Furnace structure & material | The furnace adopts air-cooled double-layer carbon steel structure. Effective air-cooled guide baffles enable overall cold air circulation in the furnace shell, cooling the conductive sheets of heating elements before exhausting, avoiding high-temperature oxidation and ensuring a good working environment. |
Door opening mode | Axial 180° side opening; equipped with an elastic lock on the door side for secure locking. The lock elasticity absorbs thermal expansion of refractory materials, allowing free expansion/contraction and effective sealing. |
Refractory & insulation material | Lined with vacuum-formed high-purity alumina lightweight material, featuring high operating temperature, low heat storage, rapid thermal shock resistance, no cracking, no spalling, and excellent insulation. |
Fan | Agitation fan + inverter + water cooling |
Air intake | 60W blower, bottom air intakeFull power below 520°C; run 30s every 10min above 520°C; full power after holding |
Touch screen | 7-inch; Chinese menu, multiple heating curve storage, historical curve & data report storage |
Exhaust gas purification | Organic exhaust is heated above 760°C (depending on composition) to oxidize VOC into CO₂ and H₂O.Quartz tube in chamber: both ends φ50, middle φ150, heating height 600 |
Furnace shell temperature | Shell temperature < ambient temperature + 20°C |
Safety protection | Integrated module control unit; dual-loop control & protection. Functions: overshoot, over-adjustment, under-adjustment, thermocouple break, phase loss, over-voltage, over-current, over-temperature, current feedback, soft start. |
Power cut when door opens | Main heating circuit cuts off automatically when door is opened at high temperature, preventing electric shock during high-temperature operation. |
Safe temperature control | Closed-loop SCR module trigger control (phase-shift or zero-crossing). Continuously adjustable voltage/current/power with constant voltage/current/power characteristics. Current loop as inner loop, voltage loop as outer loop. Limits output current within rated value under sudden load or overload, ensuring stable output and protecting heating elements. |
Temperature curve setting | Intelligent temperature controller with PID, APID, MPT, auto-tuning & self-learning, no overshoot/undershoot. 30-segment program control for any slope heating/cooling; programmable commands (jump/loop/run/pause/stop); editable during operation; curve-fitting for smooth control. |
Heating curve segments | 50-segment program control: 1 curve (50 segments), 2 curves (28 segments each), 3 curves (15 segments each), 5 curves (9 segments each). Multiple curves storable and callable. |
Panel buttons | Main power button/knob; heating chamber switch button/knob. |





