Annealing furnace FMU-20

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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. Designed as a front-loading laboratory furnace with a 40-liter chamber (300 × 300 × 450 mm), it features heating elements embedded on three sides for fast, uniform heat distribution and minimal temperature gradient, suitable for sintering, calcination, ashing, ceramic firing, glass seal firing, wax burnout, and gravimetric analysis workflows.

Construction & Thermal Control
Built with high-grade 1500 alumina ceramic fiber board insulation and a steel exterior with an air-cooling fan, the FMU-20 balances thermal efficiency with a safe-to-touch outer surface. It includes a programmable digital PID temperature controller with 32 segments and ±1°C accuracy for precise, repeatable thermal profiles. Additional protections include overheat protection, power-failure auto-resume, self-tuning PID control with minimal overshoot, and broken thermocouple protection.

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-alumina ceramic fiber insulation minimizes heat loss and reduces operating energy consumption.

Features

• Safe-Touch steel body
• High-grade 1500 alumina ceramic fiber insulation for thermal efficiency
• Three-side embedded heating elements for uniform temperature distribution
• Robust steel construction with air cooling for safe exterior handling
• Front-loading chamber with stainless steel hinged door
• Built-in vent port (optional) for moisture and contaminant removal
• Optimized chamber design for uniform heat transfer
• Microprocessor-based PID controller with auto-tuning
• Programmable temperature control with multi-segment profiles
• Simultaneous display of set and actual temperature
• Precise ±1°C control accuracy for reproducible processes
• Integrated control system for stable thermal performance
• Overheat protection with automatic shutdown
• Broken thermocouple protection system
• Power failure recovery resumes operation automatically
• Leakage circuit breaker for electrical safety
• PID control minimizes temperature overshoot

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)
• 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
• 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)
• Thermocouple: Type N
• Heating Element: HRE alloy heating wire
• Chamber Size: 300 × 300 × 450 mm
• Insulation Material: 1500 Grade Alumina Ceramic Fiber
• Structure: Bench-top, front loading
• Cooling: Air cooling fan
• Display: LED
• Package Size: 1260 × 1260 × 1490 mm
• Gross Weight: 370 kg
• Net Weight: 305 kg