| Category | Muffle Furnace |
| Model | Gem Furnace |
| Max Temperature | 1000°C (1832°F) |
| Working Temperature | 900°C |
| Thermocouple Type | N (Nicrosil-Nisil) |
| Thermocouple Details | 6mm diameter, Type N, Tolerance Class 2, 0 to +1100°C range, MgO insulated mineral, Inconel 600 sheath |
| Heating Element | Kanthal A1 (FeCrAl) |
| Element Details | Superior cyclic performance, FeCrAl alloy with rare earth elements, Max temp: 1425°C |
| Chamber (MM) | 330 x 330 x 650 |
| Outer Body (MM) | 745.0 x 940.0 x 925.0 |
| Chamber Volume | 70.8 Litres |
| Volume (cu.ft) | 23 ft³ |
| Power Load | 15.67 kW |
| Power Supply | 440V, Three Phase |
| Gross Weight | 207.75 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 330 x 330 x 650 MM chamber with usable chamber volume of 70.8 litre, approximate power load of 16.2 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: 330 x 330 x 650 MM, 33 x 33 x 65 CM and 13 x 13 x 26 INCH. Buyers searching for 1000 Degree Celsius Gem Furnace 330 x 330 x 650 MM chamber; 1000°C Gem Furnace 330 x 330 x 650 MM; 1000 Degree Celsius Gem Furnace 33 x 33 x 65 CM chamber; 1000°C Gem Furnace 33 x 33 x 65 CM; 1000 Degree Celsius Gem Furnace 13 x 13 x 26 INCH chamber; 1000°C Gem Furnace 13 x 13 x 26 INCH can verify the same physical chamber on this canonical product page before requesting price, GST invoice, packaging and delivery.
Trutherm manufactures 1000 Degree Celsius (°C) Gem Furnace 330 x 330 x 650 MM Chamber for buyers who search by exact machine type, chamber size and 1000°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.
Uniform chamber heating and a simple door-loading design make a muffle furnace straightforward to standardise across multiple operators and shifts.
Where sample volume and process type vary week to week, a general-purpose muffle furnace avoids the cost of maintaining several process-specific furnace types.
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.