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The BWF-12/12CR Muffle Furnace is the high-throughput counterpart to the compact BWF-12/07CR — offering 71% more chamber volume at 12L while maintaining the identical 1200°C maximum temperature, 1100°C working temperature, ±1°C temperature uniformity, and full programmable PID control architecture. Designed for industrial and academic laboratories requiring simultaneous processing of larger sample quantities or larger individual sample formats, the BWF-12/12CR delivers the throughput step-change that busy material testing, ashing, annealing, and sintering workflows demand — backed by a 4kW Fe-Cr-Al heating system, alumina ceramic fiber insulation, 7×9 programmable segment controller, Type K thermocouple sensing, chimney design, and stainless steel outer construction. For laboratories where a 7L chamber is a daily throughput constraint, the BWF-12/12CR is the precise, programmable, and durable solution. Enquire today.
The BWF-12/12CR Muffle Furnace delivers 12L high-throughput capacity at 1200°C — combining durable Fe-Cr-Al heating elements, alumina ceramic fiber insulation, microprocessor PID control with 7×9 programmable segments, Type K thermocouple sensing, and chimney design for demanding industrial and academic ashing, sintering, annealing, and material analysis applications.
The BWF-12/12CR's 12L chamber — with interior dimensions of 300 × 200 × 200 mm — provides significantly more usable processing space than the BWF-12/07CR's 7L (200 × 300 × 120 mm interior). The larger 200 mm interior height, in particular, accommodates taller sample formats — including upright crucible racks, stacked sample holders, and larger ceramic or metal workpieces — that cannot fit within the 120 mm internal height of the compact model. This throughput advantage directly reduces the number of sequential furnace runs required to process a given daily or weekly sample volume, improving laboratory productivity and reducing total furnace operating hours per unit of processed material.
The BWF-12/12CR's Fe-Cr-Al alloy resistance heating element is selected for its superior durability at operating temperatures up to 1100°C working temperature. The iron-chromium-aluminium alloy forms a stable, self-repairing alumina oxide surface layer during operation — providing oxidation resistance and element longevity significantly exceeding that of conventional Ni-Cr alternatives at these temperatures. In a 4kW high-throughput furnace running intensive daily cycles in an industrial or high-volume academic laboratory, Fe-Cr-Al element durability is a meaningful maintenance and cost-of-ownership consideration that directly affects instrument availability and laboratory scheduling.
The BWF-12/12CR's alumina ceramic fiber insulation lines the full interior of the 12L chamber — providing outstanding thermal resistance across the larger chamber volume. In a larger furnace, maintaining ±1°C temperature uniformity across a wider chamber volume is inherently more demanding than in a compact 7L unit, and the ceramic fiber insulation's superior thermal performance compared to dense refractory brick is particularly important at 12L scale for achieving the ±1°C uniformity specification consistently. The low thermal mass of ceramic fiber also ensures that the BWF-12/12CR heats from cold to working temperature within 30–52 minutes despite its larger chamber volume.
The BWF-12/12CR uses the same microprocessor PID controller architecture as the BWF-12/07CR — supporting 7 independent programs with up to 9 segments each. This programmable control system is particularly valuable in a high-throughput 12L furnace where different users or different analytical protocols may require distinct temperature profiles for simultaneous or sequential sample batches. The ability to store 7 ready-to-recall programs allows each regular user or protocol to have a dedicated stored temperature profile — eliminating the need to reprogram the controller before each run and ensuring that all runs of the same protocol are executed with identical temperature parameters.
The BWF-12/12CR achieves ±1°C temperature uniformity throughout its 12L chamber — matching the uniformity specification of the compact BWF-12/07CR across a significantly larger chamber volume. This uniformity is achieved through the combination of ceramic fiber insulation for even heat distribution, a carefully designed Fe-Cr-Al heating element configuration providing balanced heat input across the chamber geometry, and the continuous PID modulation of heating power based on Type K thermocouple feedback. ±1°C uniformity at 12L scale is the critical performance requirement for high-throughput analytical laboratories where multiple samples processed simultaneously in the same furnace run must experience identical thermal conditions to produce comparable and reproducible results.
The BWF-12/12CR incorporates the same chimney design as the BWF-12/07CR — providing controlled exhaust for combustion gases, volatile decomposition products, and atmosphere management during high-temperature processing. In a 12L high-throughput furnace processing larger batches of ashing samples simultaneously, effective chimney performance is particularly important for maintaining the oxidising atmosphere required for complete combustion across a larger number of simultaneously processed samples. The chimney prevents product gas accumulation from multiple simultaneous samples from interfering with combustion completeness and sample quality.
The BWF-12/12CR's stainless steel outer structure provides industrial-grade durability appropriate for the higher-intensity daily use patterns of throughput-focused industrial and academic laboratories. The stainless steel exterior withstands the physical demands of frequent sample loading and retrieval operations, chemical cleaning procedures, and the accumulated wear of intensive laboratory use — maintaining its structural integrity and professional appearance over the BWF-12/12CR's full operational lifetime. The 490 × 690 × 730 mm exterior dimensions, combined with a 67 kg net weight, position the BWF-12/12CR as a bench-mounted or instrument stand unit appropriate for high-traffic laboratory workstations.
The BWF-12/12CR Muffle Furnace incorporates the same comprehensive four-system safety architecture as the BWF-12/07CR — scaled to the 12L, 4kW high-throughput format — providing over-temperature alarm, dual-mode warning alerts, electrical protection, and automatic door-open shutdown for safe high-volume industrial and academic heat treatment operations.
The BWF-12/12CR's over-temperature alarm continuously monitors the Type K thermocouple signal and activates when chamber temperature exceeds the user-configured safety threshold. In a high-throughput 12L furnace processing larger batch volumes of samples at temperatures up to 1200°C, an over-temperature excursion can simultaneously affect a larger quantity of samples and represents a proportionally greater safety risk from thermal runaway. The independent over-temperature alarm provides the critical early warning required to prevent sample damage, heating element degradation, and laboratory safety hazards in industrial and academic high-volume furnace operations.
The BWF-12/12CR provides both audible and visual alarm outputs for all warning conditions — ensuring that over-temperature alerts, door-open status, and system fault states are communicated effectively in the higher-noise environments typical of industrial laboratories and busy academic research facilities where background noise and visual distractions may prevent operators from monitoring the furnace display continuously during extended processing sessions.
The BWF-12/12CR's 4kW rated power makes robust three-layer electrical protection against over-current, over-voltage, and overheating an essential safety requirement. Over-current protection guards the 4kW heating circuit and motor control electronics from electrical fault damage; over-voltage protection prevents controller and element damage from supply voltage transients common in industrial electrical environments; and overheating protection monitors the thermal state of the electrical control section — preventing heat-related component failure during the extended high-load operating cycles typical in industrial and high-throughput academic furnace applications.
The BWF-12/12CR's automatic shutdown on door opening is particularly important at the 12L scale — where the larger chamber volume at operating temperature represents a greater thermal radiation hazard and a larger cold air influx volume upon door opening. Automatic heating shutdown when the door is opened protects the operator from intense thermal radiation exposure, prevents thermal shock damage to the Fe-Cr-Al heating element from sudden cold air contact at operating temperature, and maintains chamber temperature stability by limiting the duration and extent of heat loss from each door opening event.