Muffle Furnaces
These economical, benchtop muffle furnaces have one-piece ceramic chambers with the heating elements completely hidden. They are suitable for most heat-treatment processes at temperatures up to 1050°C (1922°F) or higher for brief periods. For particular applications, these furnaces may also be equipped for adjustable airflow or controlled inert atmospheres, special controller requirements, over-temperature protection, remote monitoring etc.
Specifications
| Max Temp. | 1199°C 1050°C (continuous) |
| Lining | High alumina, cast one-piece muffle |
| Elements | Wire – Kanthal A1 |
| Thermocouple | Type ‘K’ or type ‘N’ |
| Power Control | Solid State Relay(s) via temperature controller and incorporating a power isolating, door interlock switch |
| Construction | Twin skin construction with extruded aluminium frame, clad in steel panels, all powder coated for easy cleaning, over a steel-cased heating module |
| Insulation | Ceramic fibre and ceramic fibre board insulation around the wire wound muffle |
| Door | Standard: Stainless steel, counter-balanced top-opening door. Optional: Stainless steel, centre-pivot, side-opening door |
| Temperature Controller | Digital PID or programmable precision temperature controller |
| Over temp. Protection | Optional: Monitory control using a limit controller and discrete thermocouple |
| Venting | Standard: Non-assisted with exhaust tube through top Optional: Rear chimney or adjustable preheated airflow for ashing or cupellation work |
| Model No. | WW31A | WW71A | WW161A |
|---|---|---|---|
| Chamber H x W x D | 90 x 165 x 245 mm | 140 x 170 x 290 mm | 160 x 235 x 430mm |
| Power | 2.4kW | 3.6kW | 4.8kW |
| External H x W x D | 530 x 495 x 450 mm | 610 x 495 x 500 mm | 685 x 615 x 730 mm |
| Weight | 35kg | 43kg | 75kg |
These silicon carbide muffle chamber furnaces provide the ideal furnace conditions for gold cupellation work and many other processes where indirect heating and controlled airflow are required. The heat energy is provided by coiled wire elements, as in the wire embedded type furnaces, but located in an outer chamber. The excellent thermal conductivity of silicon carbide provides a working chamber with almost no temperature variations. Controlled airflow passing through the chamber is pre-heated allowing full use of the available hearth area.
Specifications
| Max Temp. | 1250°C 1200°C (continuous) |
| Lining | Silicon carbide muffle inside K23 insulating bricks, grooved to support heating elements |
| Elements | Wire – Kanthal A1 |
| Thermocouple | Type ‘K’ or type ‘N’ |
| Power Control | Solid State Relay(s) via temperature controller and incorporating a power isolating door interlock switch |
| Construction | Twin skin construction with extruded aluminium frame, clad in steel panels, all powder coated for easy cleaning, over a steel-cased heating module |
| Insulation | Insulating brick with ceramic fibre backup insulation |
| Door | Standard: Stainless steel, counter-balanced top opening Optional: Stainless steel, centre-pivot, side opening door |
| Temperature Controller | Digital PID or programmable precision temperature controller |
| Over temp. Protection | Monitory control using a limit controller and discrete thermocouple |
| Venting | Standard: Non assisted with exhaust vent tube through rear Optional: Rear chimney, adjustable preheated airflowor fan assisted, as required |
| Model No. | WEM132A | WEM172A | WEM202A |
|---|---|---|---|
| Chamber H x W x D | 150 x 230 x 380 mm | 150 x 250 x 460 mm | 180 x 260 x 460 mm |
| Power | 7.2kW | 7.2kW | 8.6kW |
| External H x W x D | 865 x 650 x 740 mm | 865 x 650 x 740 mm | 845 x 760 x 850 mm |
| Weight | 100kg | 105kg | 135kg |
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