Muffle furnace FMU-20

annealingcalcinationanalysis

Product overview
Labotemp Muffle Furnace FMU-20 is a bench-top box furnace engineered for laboratories requiring reliable high-temperature processing up to 1200°C. It is a front-loading laboratory furnace with a 40-liter chamber (300 × 300 × 450 mm). Three-sided embedded heating elements provide fast, uniform heat distribution and minimal temperature gradient for consistent results in sintering, calcination, ashing, ceramic firing, glass seal firing, wax burnout, and gravimetric analysis workflows.

Design & construction
Built with high-alumina ceramic fiber board insulation (1500 grade) and a steel exterior with an air-cooling fan, the FMU-20 balances thermal efficiency with a safe-to-touch outer surface. The chamber is front-loading with a stainless steel hinged door and an optimized chamber design for uniform heat transfer.

Control & safety
The furnace features a programmable digital PID temperature controller supporting 32-segment profiles (programmable digital controller, 32–50 segments) with auto-tuning and ±1°C temperature accuracy. Integrated protections include overheat protection with automatic shutdown, broken thermocouple protection, leakage circuit breaker for electrical safety, and power-failure auto-resume to recover and continue the programmed profile.

Why choose FMU-20

• Uniform heating performance: Three-sided embedded elements deliver superior temperature uniformity across the full chamber volume.
• Precise process control: 32-segment programmable PID controller with ±1°C accuracy supports complex, repeatable thermal protocols.
• Energy-efficient construction: High-grade ceramic fiber insulation minimizes heat loss and reduces operating energy consumption.

Features

• Safe-touch steel body (exterior engineered for safe handling).
• High-grade 1500 alumina ceramic fiber insulation for thermal efficiency.
• Three-side embedded heating elements for uniform temperature distribution.
• Steel construction with air cooling for safe exterior handling.
• Front-loading chamber with stainless steel hinged door.
• Optional built-in vent port for moisture and contaminant removal.
• Microprocessor-based PID controller with auto-tuning (minimal overshoot).
• Programmable temperature control with multi-segment profiles (32–50 segments).
• Simultaneous display of set and actual temperature (LED display).
• Precise ±1°C control accuracy for reproducible processes.
• Overheat protection, broken thermocouple protection, and leakage circuit breaker.
• Power failure recovery that resumes operation automatically.

Applications

• High-temperature material testing including ceramics, metals, and composites up to 1200°C.
• Heat treatment processes such as annealing, sintering, and calcination with controlled ramp rates.
• Pharmaceutical and chemical sample ashing and thermal analysis.
• Academic and research labs requiring programmable thermal profiling.
• Quality control and validation processes under controlled temperature conditions.

Standard accessories

• Chamber furnace (unit itself).
• Type N thermocouple.
• Crucible tongs.
• Thermal resistance gloves.
• Manual book.

Optional accessories

• Exhaust chimney device.
• Extra N type thermocouple.
• Alumina crucible.

Technical specifications

• Capacity: 40 Liters (chamber size 300 × 300 × 450 mm).
• Maximum Temperature: 1200°C.
• Continuous Working Temperature: 1100°C.
• Minimum Temperature: Ambient.
• Heating Rate: 25°C/min (Recommended: 0–20°C/min).
• Temperature Accuracy: ±1°C.
• Voltage: AC 220V 50Hz.
• Power: 12 kW.
• Phase: Three Phase.
• Controller: Programmable Digital Controller (32–50 segments), microprocessor-based PID with auto-tuning.
• Thermocouple: Type N.
• Heating Element: HRE alloy heating wire.
• Insulation Material: 1500 Grade Alumina Ceramic Fiber.
• Structure: Bench-top, front loading.
• Cooling: Air cooling fan.
• Display: LED (simultaneous set & actual temperature).
• Package Size: 1260 × 1260 × 1490 mm.
• Gross Weight: 370 kg.
• Net Weight: 305 kg.