Labotemp Muffle Furnace FMU-21 is a high-temperature electric muffle furnace engineered for demanding thermal processing, material analysis, sintering, ash determination, and heat-treatment applications in research laboratories, universities, industrial facilities, and mining operations. This laboratory furnace offers a maximum operating temperature of 1700°C with a recommended continuous working temperature of 1650°C, making it suitable for advanced ceramic, metallurgical, and inorganic material testing. The 6.7 L chamber is constructed with high-temperature-resistant polycrystalline mullite fiber insulation, ensuring excellent thermal efficiency, rapid heat-up performance, and reduced energy consumption. Combined with high-purity silicon molybdenum heating elements and intelligent PID control, the furnace delivers stable temperature uniformity and precise heating accuracy of ±1°C for reliable and repeatable results.
Designed for long-term laboratory use, the FMU-21 features a programmable microcomputer controller with fixed-value and multi-step program operation modes, allowing accurate process control for complex heating profiles. The robust cold-rolled steel exterior, vacuum-formed insulation structure, and double-shell ventilation design help maintain lower external surface temperatures while improving operational safety. Additional protection systems including over-temperature alarms, leakage protection, sensor fault detection, and automatic power interruption when the door opens enhance user safety and equipment reliability.
Why Choose Labotemp Muffle Furnace FMU-21?
✓ 1700°C High-Temperature Capability: Suitable for advanced sintering, calcination, and material testing applications.
✓ Energy-Efficient Insulation Design: Polycrystalline mullite fiber chamber reduces heat loss and improves thermal efficiency.
✓ Comprehensive Safety Protection: Features over-temperature alarms, leakage protection, sensor monitoring, and door-open power cutoff.
| Capacity | 6.7 L |
|---|---|
| Temperature Range | 1700°C |
| Power Supply | AC220V / 50Hz |
| Heating Power | 9 kW |
| Temperature Accuracy | ±1°C |
| Temperature Resolution Ratio | 1°C |
| Temperature Rise Time | ≤140 min |
| Heating Element | High-temperature resistant silicon molybdenum rod |
| Temperature Control Mode | Intelligent microcomputer PID control |
| Setting Method | Standard: 4-key settings; P Type: 5-key settings; PL Type: Touch operation |
| Timer | Standard: 0–9999 min; P Type: 0–99 h 59 min; PL Type: 0–9999 min |
| Operation Function | Fixed value running or program running |
| Sensor | Type B Thermocouple |
| Chamber Material | High-temperature resistant polycrystalline mullite fiber |
| Exterior Material | Cold-rolled steel plate with surface spray treatment |
| Chamber Size (W×D×H) | 300 × 150 × 150 mm |
| Net Weight | 110kg |
| Gross Weight | 130kg |
| Packing Dimensions (W×D×H) | 910 × 985 × 1310 mm |
Suitable for high-temperature material research, ceramic sintering, metallurgical analysis, ash content determination, refractory material testing, and heat-treatment processes up to 1700°C. Widely used in university laboratories, research institutes, mining and industrial quality-control facilities for thermal processing, inorganic material characterization, sample preparation, process development, and advanced materials evaluation requiring precise programmable temperature control and reliable safety protection.
