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Muffle furnaces are commonly used in laboratories & factories, providing a safe & effective means of heat treating materials at temperatures of or above 1200 deg C. Highly accurate, these devices are critical in labs & manufacturing operations where temperature precision, temperature control, and consistent heating are highly valued. Muffle furnaces also allow testing of materials in a clean environment (free of combustible gases and + byproducts).
There are several applications for muffle furnaces, including determination of ash & materials, annealing, & ceramic development. The Silicon Carbide (SiC) construction used in muffle furnaces results in great temperature uniformity & efficiency, thanks to the low thermal mass insulating material used to reduce energy usage. Muffle furnaces provide a reliable method for performing thermal treatment in all areas of science & industry through their utilization of gravimetric analysis, sampling of coal, heating treatment, & ashing of organic materials.
About Muffle Furnace - MF
What is a Muffle Furnace?
This device is used specifically for heating materials using a heat resistant insulated chamber (muffle) to remove the risk of direct flame or combustion gases touching the sample(s). The isolation of the heating chamber from the muffle allows for even and uniform heating of the sample(s) with no potential contamination of the sample(s). This makes this type of device an excellent choice for analytical procedures requiring very precise material testing or thermal treatments where purity and accuracy are essential to meets the requirements of the end user.
Types of Muffle Furnace
- MF112, 1.5 Liter Compact Muffle Furnace (100 mm x 100 mm x 150 mm)(H X W X D) at 2.0 KW is a compact,and therefore suitable for assorted testing in laboratories.
- MF312, 5 Liter Muffle Furnace (Internal 95 mm x 175 mm x 300 mm) (H X W X D) provides 2.8 kW of heating power and is ideal for analytical processes with medium to high capacities.
- MF412, 7.9 Liter Muffle Furnace (Inside 150 mm x 175 mm x 300 mm) (H X W X D) provides 3.2 kW of heating power and is suitable for use when additional capacity is needed to process a higher number of samples compared to the MF312.
- MF512, 18.5 Liter Muffle Furnace (Inside 230 mm x 200 mm x 400 mm) (H X W X D) provides 8 kW and is used by manufacturing plants, manufacturers and laboratories that have requirements for increased number of samples and production of larger quantities of materials using similar methods.
How Does a Muffle Furnace Work?
High Temperature Muffle Furnace contain Iron-Chromium-Aluminum (FeCrAl) heater units that supply reliable heat to a silicon carbide muffle chamber. An N-type thermocouple sensor continuously measures and sends this information to a seven segment display within the PID controller (±1 °C). The solid-state relay or thyristor unit regulates the electricity to the heater in order to keep accurate temperature control according to set temperatures. The special construction of ultra-high purity alumina insulation vacuum formed around pre-sintered fiber board reduces heat loss. The double shell (with cooling fans) also lowers external surface temperature to maintain operator safety. A limit switch connected to the furnace door automatically disconnects the electrical power to the heater, and limiters to limit overheating meet the Class 2 heat requirement under EN 60519-2. Break protection and overloads in thermocouples protect against runaway heating failures in order to provide safe use and dependability.
Features of Industrial Muffle Furnace
Industrial Muffle furnaces offer many important features to allow the user to achieve the highest quality of research in a laboratory environment. The high temperature laboratory furnace models manufactured by Tempsens provide unique characteristics to improve their overall performance.
- Suhu Operasional – Maximum operating temperature of 1200 degrees Celsius with full and consistent heat distribution over the entire Silicon Carbide cavity.
- Precision Control – The Digital 7-segment LED display will provide a +/- 1°C accuracy which will give you repeatable testing results.
- Isolasi – Low thermal mass ceramic fibre insulation material provides the Industrial Muffle Furnace with optimal energy efficiency.
- Keamanan – High-temperature safety devices include over-temperature limiters, protection against thermocouple failures, and door limit switches.
- Konstruksi – Available in either a powder-coated mild steel cabinet (1.6 mm thickness) or optional 304-grade stainless steel.
- Elemen Pemanas – High-performance, durable, and consistent heating elements Include FeCrAl resistance wires.-Temperature Measurement – The High Temperature Laboratory Furnace utilizes NABL certified N-type thermocouples so you can accurately monitor temperature.
- Door Mechanism – The Industrial Muffle Furnace has a parallel motion swing door with push-down lever locking devices.
- Kontrol Daya – Solid-state relay or thyristor units for a quiet operation.
- Optional Items – Programmable PID controller with RS-232/RS-485/Ethernet connectivity, and options for vacuum or gas-purging operations (Ar, N₂, H₂, O₂, or CO₂), observation windows.
Specifications of Muffle Furnace
| Model | Liter | Suhu Maks. | Dimensi Dalam (Lebar×Kedalaman×Tinggi) (mm) | Dimensi Internal (Lebar×Kedalaman×Tinggi) (mm) | Daya (kW) | Elemen Pemanas | Detil |
|---|---|---|---|---|---|---|---|
| MF112 | 1.5 | 1200 derajat celcius | 100×150×100 | 100×100×150 | 2.0 | FeCrAl | Detail lebih lanjut |
| MF312 | 5 | 1200 derajat celcius | 175×300×95 | 95×175×300 | 2.8 | FeCrAl | Detail lebih lanjut |
| MF412 | 7.9 | 1200 derajat celcius | 175×300×150 | 150×175×300 | 3.2 | FeCrAl | Detail lebih lanjut |
| MF512 | 18.5 | 1200 derajat celcius | 200×400×230 | 230×200×400 | 8.0 | FeCrAl | Detail lebih lanjut |
Why Choose Tempsens for Muffle Furnaces?
- Kontrol Kualitas: Unit construction is durable and uses NABL certified thermocouples.
- Kustomisasi: Standard units are available in addition to custom sizes based on individual requirements.
- Diverse Selection: Model capacities range from 1.5L to 18.5L and can achieve operating temperatures between 500 and 1200 Celsius.
- Safety Compliance: All thermal protection systems installed on these kilns conform to EN 60519-2 standards.
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Find answers to frequently asked questions related to Muffle Furnace - MF.
The muffle furnace is capable of producing temperatures between 500 °C and 1200 °C with a maximum temperature of 1200 °C and an accuracy of ±1 °C for high-precision thermal processing.
The steel and paint industries, the biotech industry, and the rice laboratory are industries that use muffle furnaces to perform the following: ash determination, annealing, coal analysis, and testing of materials.
Before opening the chamber of a muffle furnace, you should wear heat protection gloves and tongs. Ensure that the furnace is well ventilated and always check the door limit switch prior to opening the door.Additionally, give the muffle furnace ample time to cool before opening the chamber.
The heating elements of your muffle furnace should be inspected regularly, the controllers calibrated and all residue cleaned from the muffle furnace. The thermocouples should also be checked for proper accuracy and functioning to provide proper performance and extended life span of the muffle furnace.
Muffle furnaces typically can achieve much higher temperature ratings than the average laboratory oven. The maximum temperature that a muffle furnace is capable of reaching is 1200° Celsius, while laboratory ovens are used to dry or sterilise materials below 300° Celsius.
