| Category | Muffle Furnace |
| Model | Gem Furnace |
| Max Temperature | 1200°C (2192°F) |
| Working Temperature | 1100°C |
| Thermocouple Type | S (Platinum-10% Rhodium) |
| Thermocouple Details | 6mm diameter, Type S, Tolerance Class 2, 0 to +1450°C range, High purity alumina insulation, Platinum sheath |
| Heating Element | Kanthal A1 (FeCrAl) |
| Element Details | Superior cyclic performance, FeCrAl alloy with rare earth elements, Max temp: 1425°C |
| Chamber (MM) | 450 x 450 x 600 |
| Outer Body (MM) | 855.0 x 1060.0 x 880.0 |
| Chamber Volume | 121.5 Litres |
| Volume (cu.ft) | 28.9 ft³ |
| Power Load | 20.29 kW |
| Power Supply | 440V, Three Phase |
| Gross Weight | 252.62 kg |
| Chamber Shape | Square |
A general furnace used for heat-treating gemstones to enhance their color or clarity. Operating at controlled temperatures around 600°C, it can alter the oxidation state of trace elements within the crystal lattice. The working principle involves a controlled atmosphere (often reducing) and very precise temperature ramps to avoid thermal fracturing of the precious stones. Its purpose is commercially significant for treating sapphires, rubies, topaz, and citrine to improve their market value. It is a specialized tool in the gemstone trade and lapidary workshops.
Equivalent chamber references: 450 x 450 x 600 MM, 45 x 45 x 60 CM and 18 x 18 x 24 INCH. Buyers searching for 1200 Degree Celsius Gem Furnace 450 x 450 x 600 MM chamber; 1200°C Gem Furnace 450 x 450 x 600 MM; 1200 Degree Celsius Gem Furnace 45 x 45 x 60 CM chamber; 1200°C Gem Furnace 45 x 45 x 60 CM; 1200 Degree Celsius Gem Furnace 18 x 18 x 24 INCH chamber; 1200°C Gem Furnace 18 x 18 x 24 INCH can verify the same physical chamber on this canonical product page before requesting price, GST invoice, packaging and delivery.
Trutherm manufactures 1200 Degree Celsius (°C) Gem Furnace 450 x 450 x 600 MM Chamber for buyers who search by exact machine type, chamber size and 1200°C temperature rating. This page is specific to the MM dimension version, so the chamber size is presented in the unit normally used in the buyer's drawing, tender or purchase request.
This configuration is suitable when the sample load must fit a 450 x 450 x 600 MM chamber with usable chamber volume of 121.5 litre, approximate power load of 20.1 kW, square chamber profile. It is commonly selected for laboratory, QC, metallurgical, ceramic, pharmaceutical and industrial heat-treatment work requiring stable heating and repeatable process conditions. Typical use includes general laboratory and industrial heat-treatment applications requiring stable, repeatable temperature control.
Because muffle furnaces are used across ashing, drying, calcination and light heat-treatment, the chamber and controller are specified for flexibility rather than one narrow process window.
Routine QC and teaching labs value a muffle furnace precisely because one unit can cover several standard test methods without dedicated process-specific tooling.
As a general-purpose muffle furnace, this model covers a broader range of routine heating tasks than a process-specific ashing, tube or sintering furnace, making it the practical default when the lab runs mixed sample types rather than one dedicated process.