SciMed
Muffle Furnace 1200°C Digital — Kanthal Wire, PID Controller, Ashing / Sintering / Heat Treatment
Muffle Furnace 1200°C Digital — Kanthal Wire, PID Controller, Ashing / Sintering / Heat Treatment
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Rectangular industrial muffle furnace with Kanthal wire heating elements on 4-side uniform-distribution grooved refractory, max temperature 1,200°C (working 1,100°C), PID electronic digital temperature controller cum indicator with pyrometer thermocouple. Muffle chamber 225 × 100 × 100mm (9" × 4" × 4"). Silver fuse over-heat protection. ISO / CE certified. Ashing, sintering, ceramic firing, gold + silver assay, cement raw mix testing, coal + coke analysis, heat treatment of small metal parts. $4,999 direct — versus $11,000-$18,000 for Nabertherm L 3/11, Thermo Thermolyne F48000, or Carbolite AAF 11/3.
What a muffle furnace does
A muffle furnace heats samples in a sealed refractory chamber (the "muffle") that isolates them from combustion byproducts — critical for accurate ash content, loss on ignition (LOI), gravimetric analysis, and material property testing where contamination would skew results. Kanthal wire heating elements deliver clean, controllable heat up to 1,200°C through a grooved refractory brick liner that surrounds the sample chamber on 4 sides for uniform temperature distribution. The PID digital controller holds setpoint ±3-5°C once equilibrated; the pyrometer thermocouple provides continuous temperature verification.
Specifications
| Max temperature | 1,200°C |
|---|---|
| Continuous working temperature | 1,100°C (recommended for element life) |
| Muffle chamber (internal) | 225 × 100 × 100mm (9" × 4" × 4") — ~2.25 L |
| Heating elements | Kanthal wire (FeCrAl alloy) — high-temp, oxidation-resistant, replaceable |
| Heat distribution | 4-side uniform heating (Kanthal wire on all 4 walls) |
| Insulation | High-temperature insulating material (ceramic fiber + refractory brick) |
| Outer body | Thick mild steel, powder-coated + attractive stoving enamel finish (heavy-gauge G.I.) |
| Refractory | Grooved brick supporting Kanthal elements (easily replaceable when elements need service) |
| Temperature control | Electronic Digital PID Controller cum Indicator (setpoint ± 3-5°C at equilibrium) |
| Sensor | Pyrometer thermocouple (K-type standard, S-type available on request for higher precision) |
| Safety | Solid-state silver fuse — protects heating elements against over-heat |
| Power supply | 220V or 110V AC (specify at order) — dedicated 15A circuit typical |
| Rated power | 2.5-3 kW (varies with heating element configuration) |
| Heat-up time | Ambient → 1000°C in ~45-60 minutes typical |
| External dimensions | ~500 × 450 × 550mm (approx.) |
| Weight | ~40 kg |
| Standards | ISO 9001 · CE marked · IEC 61010 electrical safety compliant |
| Country of origin | Made in India — quality-assured for export |
| Warranty | 1-year parts + labor · Kanthal elements: 6-month (consumable at max temp) or 2-year (at 1000°C working) |
Comparison to alternatives
| Feature | SciMed Muffle Furnace | Nabertherm L 3/11 | Thermo Thermolyne F48000 | Carbolite AAF 11/3 |
|---|---|---|---|---|
| Price | $4,999 | $8,000-$11,000 | $6,000-$9,000 | $10,000-$14,000 |
| Max temperature | 1200°C | 1100°C (L 3/11), 1200°C (LT 5/12) | 1093°C | 1100°C |
| Chamber volume | 2.25 L (225×100×100 mm) | 3 L | 1.5 L | 3 L |
| Elements | Kanthal wire (FeCrAl) | Silicon carbide + Kanthal | Coiled wire | Kanthal wire |
| Heat distribution | 4-side uniform | Ring elements | Bottom + rear | Ring elements |
| Controller | PID digital | PID with programmer | PID digital | PID with 8-segment programmer |
| Certification | ISO / CE | CE / DIN EN 60519 | CE / UL / CSA | CE / UKCA |
| Lead time | Same-day US ship | 4-8 weeks | 4-6 weeks | 6-10 weeks |
| Warranty | 1-year parts | 2-year | 1-year | 2-year |
Applications by industry
| Industry | Application | Standard method / temperature |
|---|---|---|
| Petroleum + coal | Ash content of coal + coke | ASTM D3174, D482 (750-815°C) |
| Food + feed | Ash / mineral content | AOAC 923.03, 942.05 (550°C) |
| Cement + concrete | Loss on Ignition (LOI), raw mix testing | ASTM C114 (950°C) |
| Ceramics | Bisque firing, glaze firing, crucible aging | 800-1200°C |
| Gold + silver assay | Cupellation, fire assay | 950-1000°C |
| Environmental testing | Volatile suspended solids (VSS) | Standard Methods 2540E (550°C) |
| Waste management | Incineration temperature verification | 800-1000°C |
| Metallurgy | Heat treatment of small parts, hardening | 800-1150°C |
| Polymers + rubber | Filler content, thermal stability | ASTM E1131 (550-800°C) |
| Textiles | Fiber blend analysis, mineral content | AATCC 20A (600°C) |
| Pharma + nutraceutical | Sulphated ash, residue on ignition | USP <281>, EP 2.4.14 (600°C) |
| Water treatment | Total suspended solids ignition | EPA 160.4 (550°C) |
| Academic teaching | General chemistry ash + LOI experiments | 500-1000°C |
Best for
- Coal + coke testing laboratories — ASTM ash + volatile matter compliance
- Cement + concrete QC labs — LOI + raw mix analysis
- Food + feed testing labs — proximate analysis, mineral content, AOAC ash methods
- Ceramic + refractory producers — bisque + glaze firing, crucible pre-conditioning
- Gold + silver assay houses — fire assay + cupellation
- Environmental testing labs — VSS + water treatment ash content
- Pharma + nutraceutical QC — USP <281> sulphated ash, residue on ignition
- University chemistry + materials science teaching labs — undergraduate + graduate courses
- Small metallurgy shops — heat treatment of small precision parts
- Polymer + rubber testing labs — thermal stability + filler content
- Waste incineration facilities — combustion efficiency verification
- International industrial labs (India, LATAM, MENA, SE Asia) via DDP procurement
Kanthal wire heating elements — why they matter
- FeCrAl alloy (Kanthal APM / A-1) — proprietary iron-chromium-aluminum resistance alloy, forms protective Al₂O₃ oxide layer at operating temperature that resists further oxidation
- Rated to 1250-1400°C depending on grade — comfortable safety margin above our 1200°C max
- Low creep + long life — Kanthal outlasts Nichrome (max 1150°C) and matches Kanthal Super (MoSi₂) for common lab work at lower cost
- 4-side placement — top, bottom, and both sides deliver uniform chamber temperature (critical for gravimetric ash accuracy)
- Field-replaceable — grooved refractory brick design supports Kanthal replacement in 30-45 minutes without disassembling the entire furnace
- Replacement Kanthal wire stocked ($120-180 per set) — 5+ year availability from San Jose warehouse
Buying for an industrial QC lab, university, or specialty testing facility?
SciMed supplies muffle furnaces direct to coal + coke labs, cement plants, gold + silver assayers, environmental testing labs, university chemistry departments, and small metallurgy shops globally.
- Volume pricing on 3+ unit orders — university teaching lab build-outs, cement plant multi-site rollouts
- Net-30 invoicing for verified industrial, academic, government facilities
- SAM.gov + GSA compliant procurement — federal environmental labs, EPA regional labs
- ISO 17025 documentation — factory temperature calibration records for lab accreditation submissions
- International DDP shipping — India, LATAM, MENA, SE Asia, GCC, UK, EU, AU/NZ
- Freight quotes on request — ships crated ~50 kg, US LTL freight typical, ocean for 3+ unit international orders
- S-type thermocouple upgrade — for higher-precision applications (+$300, provides ±1-2°C accuracy vs K-type ±3-5°C)
- Custom chamber sizes available — 300×150×150mm, 400×200×200mm, and larger on 4-6 week lead time (contact us)
- Programmable controller upgrade — 8-segment ramp/soak programmer +$400 (matches Carbolite AAF specification)
Frequently asked questions
What sample size can I fit inside the 225×100×100mm chamber?
Typical loads: 4-8 standard 30 mL porcelain crucibles for ashing, or a single ~200 mL ceramic dish for larger loads. For gold + silver assay: 2-3 cupels per firing. Volume ~2.25L is ideal for small-batch analytical work; if you need to run 15+ crucibles per batch or large ceramic pieces, contact us for the larger 300×150×150 or 400×200×200 chamber variants.
Is this hot enough for gold + silver fire assay?
Yes. Fire assay cupellation runs at 950-1000°C, well within the 1200°C max rating and comfortable working range. Kanthal elements handle this daily. Assay houses typically use K-type thermocouples for standard work; upgrade to S-type ($300) if you require ±1-2°C precision instead of standard ±3-5°C.
Can I run 1200°C continuously?
Not recommended. 1200°C is the max rating — running there continuously halves Kanthal element life. Recommended continuous working temperature is 1100°C. If you need 1200°C+ regularly, consider our high-temp variant with silicon carbide (SiC) elements rated to 1400°C — email for quote.
What thermocouple type does this use?
Standard K-type (Chromel-Alumel) — accurate ±3-5°C across the 0-1200°C range, suitable for ashing, LOI, general lab work. S-type (Pt/Pt-10%Rh) upgrade available for ±1-2°C precision — required for pharma USP <281> residue on ignition and some ceramic industry applications.
What's the heat-up time to 1000°C?
Typically 45-60 minutes from ambient to 1000°C. Higher setpoints require proportionally longer (75-90 minutes to 1200°C). The PID controller manages ramp rate automatically; for critical ash-content methods, allow full thermal equilibration (additional 15-20 minutes at setpoint) before starting timed hold.
Do I need special ventilation?
Yes — fume hood or dedicated ventilated cabinet is required. Ashing organic samples produces smoke + combustion gases (CO, CO₂, SO₂ from sulfur-containing samples). Never operate in a closed room without ventilation. This is a universal requirement for muffle furnaces, not specific to SciMed.
What voltage?
Specify 110V (standard US 15A circuit) or 220V (international / high-power) at order. 220V is preferred for 1200°C operation as heat-up is slightly faster; 110V is fine for continuous 1000°C or below work. Dedicated circuit strongly recommended — don't share with other high-draw equipment.
What's the warranty?
1-year parts + labor on outer body, refractory, controller, thermocouple, silver fuse. Kanthal elements: 6-month at max 1200°C use (elements are consumable at max rating) or 2-year warranty when operated at 1000-1100°C working temperature. Replacement Kanthal wire kits stocked in San Jose ($120-180 per set) with 5+ year availability post-purchase.
Is this ISO 17025 compatible for accredited labs?
Yes for the equipment side — CE + ISO 9001 manufacturing certifications standard. For ISO 17025 lab accreditation, your calibration provider will perform annual temperature calibration + uncertainty assessment on the installed furnace. Factory calibration records (traceable to NIST or NPL equivalents) included on request.
How is this shipped internationally?
US: LTL freight (crated ~50 kg, lift-gate helpful but not required). International: DHL Express DDP for single-unit urgent shipments (~$400-800 depending on country), ocean freight DDP for 3+ unit orders. Ships to India, LATAM (Mexico/Brazil/Colombia), MENA (UAE/Saudi/Egypt), SE Asia (Vietnam/Indonesia/Philippines/Malaysia), Sub-Saharan Africa (Kenya/Nigeria/South Africa), GCC, UK, EU, AU/NZ.
Why buy direct from SciMed
- ~50% of Nabertherm / Carbolite pricing — same 1200°C rating, same Kanthal elements, same PID control
- Same-day US ship — no 4-10 week manufacturer lead time (critical for QC labs replacing failed units)
- US-based technical support — installation, controller programming, element replacement guidance from San Jose team
- Industrial + academic procurement — SAM.gov, GSA, Net-30, PO acceptance, tax-exempt purchasing
- ISO 17025 lab-ready — factory calibration documentation, NIST-traceable references
- Kanthal element replacement stocked — 5+ years post-purchase parts availability
- Upgrades available — S-type thermocouple, programmable controller, larger chamber, SiC elements for 1400°C
- International DDP — industrial + academic markets globally
Shipping: Continental US LTL freight (~50 kg crated). International DHL Express or ocean freight DDP. Industrial + academic procurement: clinic@scimedstore.com. Custom duty / taxes handled per DDP terms where applicable.
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