| Category | Muffle Furnace |
| Model | Gem Furnace |
| Max Temperature | 1400°C (2552°F) |
| Working Temperature | 1300°C |
| Thermocouple Type | B (Platinum-30% Rhodium) |
| Thermocouple Details | 8mm diameter, Type B, Tolerance Class 2, 200 to +1700°C range, High purity alumina insulation, Platinum-Rhodium alloy sheath |
| Heating Element | Silicon Carbide (SiC) |
| Element Details | Max temp: 1600°C, High power density, Brittle material, SiC heating elements |
| Chamber (MM) | 225 x 225 x 450 |
| Outer Body (MM) | 640.0 x 835.0 x 735.0 |
| Chamber Volume | 22.8 Litres |
| Volume (cu.ft) | 13.8 ft³ |
| Power Load | 10.62 kW |
| Power Supply | 440V, Three Phase |
| Gross Weight | 122.38 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.
This configuration is suitable when the sample load must fit a 225 x 225 x 450 MM chamber with usable chamber volume of 22.8 litre, approximate power load of 10.2 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.
Equivalent chamber references: 225 x 225 x 450 MM, 23 x 23 x 45 CM and 9 x 9 x 18 INCH. Buyers searching for 1400 Degree Celsius Gem Furnace 225 x 225 x 450 MM chamber; 1400°C Gem Furnace 225 x 225 x 450 MM; 1400 Degree Celsius Gem Furnace 23 x 23 x 45 CM chamber; 1400°C Gem Furnace 23 x 23 x 45 CM; 1400 Degree Celsius Gem Furnace 9 x 9 x 18 INCH chamber; 1400°C Gem Furnace 9 x 9 x 18 INCH can verify the same physical chamber on this canonical product page before requesting price, GST invoice, packaging and delivery.
Trutherm manufactures 1400 Degree Celsius (°C) Gem Furnace 225 x 225 x 450 MM Chamber for buyers who search by exact machine type, chamber size and 1400°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.
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.