Nabertherm LVT15 11 B410 Ashing Furnace
| Brand | Nabertherm |
|---|---|
| Origin | Germany |
| Instrument Type | Box-type Muffle Furnace |
| Model | LVT15 11 B410 |
| Max. Temperature | 1100 °C |
| Temperature Uniformity | ±3 °C |
| Rated Power | 3.5 kW |
| Heating Time to Max. Temp. | 120 min |
| Internal Dimensions (W×D×H) | 230 × 340 × 170 mm |
| Chamber Volume | 3 L |
| Heating Method | Electric (Embedded Resistance Wire in Dual-Sided Ceramic Heating Plates) |
| Air Exchange Rate | >6 air changes per minute with preheated inlet air |
| Insulation Material | High-purity ceramic fiber |
| Housing | Double-walled stainless steel (brushed finish) |
| Controller | B410 Programmable 4-Stage PID Controller with NTLog Data Logging via USB |
| Safety Compliance | EN 60519-2, Thermal Protection Class 2 (Overtemperature Cut-off) |
| Weight | 55 kg |
| Electrical Supply | Single-phase |
Overview
The Nabertherm LVT15 11 B410 is a precision-engineered laboratory ashing furnace designed for controlled high-temperature thermal decomposition of organic matrices in analytical and quality control workflows. Operating on the principle of oxidative combustion in a defined airflow environment, it enables complete mineralization of samples while preserving inorganic residues for subsequent elemental analysis (e.g., gravimetric determination of ash content per ISO 2171, ASTM E1868, or AOAC 942.05). Its dual-sided ceramic heating plates—embedded with corrosion-resistant resistance wire—ensure uniform thermal distribution across the 3 L chamber without direct exposure to volatiles or splatter. The forced-air ventilation system delivers >6 complete air exchanges per minute, with inlet air preheated to minimize thermal gradients and suppress condensation of acidic vapors—a critical requirement for reproducible ash yield in food, pharmaceutical, and petrochemical applications.
Key Features
- Dual-zone ceramic heating plates (top and bottom) with recessed heating elements for contamination-free operation and simplified maintenance
- Preheated forced-air ventilation system maintaining stable oxygen partial pressure and minimizing localized reduction zones
- Double-walled stainless steel housing with high-density ceramic fiber insulation, limiting external surface temperature to <55 °C at ambient conditions
- B410 programmable controller supporting up to 4 independent temperature ramps and holds, with real-time setpoint tracking and deviation alarms
- Integrated overtemperature protection per EN 60519-2: independent thermal cut-off switch (Class 2) activated at user-defined limit temperature
- Low-noise solid-state relay switching and electromagnetic interference (EMI)-filtered power input for stable operation in shared lab environments
- Optional top-hinged door (LVT configuration) reducing operator exposure to radiant heat during sample loading/unloading
Sample Compatibility & Compliance
The LVT15 11 B410 accommodates standard crucibles (porcelain, platinum, alumina, silicon carbide) and supports batch processing of heterogeneous solids—including foodstuffs, feedstuffs, polymers, coal, catalysts, and biological tissues—without cross-contamination. Its airflow design complies with ISO 5651-2 requirements for ashing apparatus used in regulatory testing. All safety-critical functions—including door interlock monitoring, overtemperature shutdown, and fan failure detection—are validated per IEC 61000-6-2/6-3 for electromagnetic compatibility and functional safety. The furnace meets GLP documentation requirements when operated with NTLog-enabled USB data logging and VCD process supervision software.
Software & Data Management
Process parameters and real-time thermocouple readings are recorded via the NTLog module onto standard USB flash drives (FAT32 formatted), generating timestamped CSV files compliant with 21 CFR Part 11 audit trail requirements when used with password-protected VCD software. VCD provides remote monitoring, multi-furnace synchronization, alarm history export, and configurable report templates aligned with ISO/IEC 17025 laboratory accreditation criteria. Data integrity is preserved through cyclic redundancy check (CRC) validation and write-protection options for archived logs.
Applications
- Gravimetric ash content determination in food and feed (AOAC 942.05, ISO 2171, EN 15287)
- Residue-on-ignition testing for pharmaceutical excipients (USP <281>, Ph. Eur. 2.4.13)
- Mineralogical preparation of geological and environmental samples prior to XRF or ICP-OES analysis
- Thermal stability assessment of catalysts, battery materials, and carbon-based composites
- Pre-combustion conditioning of filter media in particulate matter (PM10/PM2.5) analysis protocols
- Decomposition of synthetic polymers and rubber compounds for filler content quantification
FAQ
What safety certifications does the LVT15 11 B410 hold?
It complies with EN 60519-2 (safety requirements for industrial electroheating equipment) and carries CE marking under the EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU.
Can the furnace be integrated into a centralized lab automation system?
Yes—via optional RS485 interface (ordered separately) and Modbus RTU protocol support in VCD software for SCADA-level integration.
Is the B410 controller compatible with external data acquisition systems?
The controller outputs analog 0–10 V signals for temperature and status; digital I/O terminals support external start/stop and alarm relay triggering.
What is the recommended maintenance interval for the heating plates?
Under normal ashing conditions (≤1000 °C, non-corrosive matrices), inspection is advised every 500 operating hours; replacement is typically required after 3,000–5,000 hours depending on thermal cycling frequency and atmosphere composition.
Does the furnace support inert-atmosphere operation?
No—it is configured exclusively for air-assisted oxidative ashing. For inert or reducing atmospheres, Nabertherm’s N 11 HR or RHT series furnaces with gas-tight seals and purge ports are recommended.
