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GENERAL DESCRIPTION
It is a model with a ceramic sheath designed to be used at high temperatures where metal protective tubes cannot withstand.
The sensor is generally produced as T/C (K, S, R, B types).
Although "Ceramic Sheath" has been accepted in widespread use, the sheath material is actually Aluminumoxide (Al2O3) and is available in 2 different models in stock.
GENERAL FEATURES
Model 190 is a model with a ceramic sheath designed to be used at high temperatures where metal protective tubes cannot withstand.
The sensor is generally produced as T/C (K, S, R, B types).
The part shown with the number "2" is a monolithic insulator used to isolate the wires from each other.
Although part number "3" is optional, it is the gas protective tube recommended by us.
Part number "4" is the sensor outer cover.
Part numbered "5" is the holder/support pipe made of stainless steel, which both allows the ceramic sheath to be glued to the head and prevents pressure on the ceramic sheath in horizontal installations.
Although "Ceramic Sheath" is widely accepted in common use, the sheath material is actually Aluminum Oxide (A1203) and is available in 2 different models in stock.
C610 (Old KER610) withstands temperatures of 1,400°C and is resistant to thermal shock thanks to its porous structure.
C799 (Old KER710) withstands temperatures of 1,700°C, but its thermal shock resistance is lower than C610 material.
T/C Thermocouple, Thermocouple Importance of wire diameter
The use of high diameter wire will bring a longer life.
Although it is made of the same material, for example, 0.50mm diameter S (PtRh10%-Pt) type wire has a much longer life than 0.35mm diameter wire. The resistance of a pencil and a toothpick made of the same tree to fire is a good example of this.
When two wires with a diameter of 0.35mm and 0.50mm are compared in terms of mass, it is seen that the mass of the 0.50mm wire is 2.04 times more than the mass of the 0.35mm wire. Naturally, this difference is reflected in the price. Similarly, we recommend that you check the wire diameters of the sensors you have purchased.
Importance of Gas Protective Tube
Especially S/R and B type T/C wires are very high priced wires. The Internal Protective Gas Protector, which will be used as a second layer, will prevent the wires from being exposed to gas in case of a possible crack in the outer sheath. In this way, it is possible for the product you send for repair to be put into use again by simply changing its outer casing.
Assembly
Although alumina material can withstand high temperatures, it is very fragile against sudden temperature changes (Thermal Shock) and mechanical impacts. The outer sheath material must be protected from mechanical impacts such as knocking and dropping.
Thermal shock is a very important element that can be overlooked but should definitely not be missed.
If the sensor is suddenly immersed in a hot area while it is at ambient temperature, or if it is suddenly raised to ambient temperature while it is in a hot area in the oven, the material molecules that will try to expand or contract as a result of the sudden change in temperature will repel each other, causing cracks or breakages. Gases that will penetrate into the protective sheath through these cracks will cause the T/C wires to become dirty and therefore produce different values due to their changing alloys.
Sensors that produce incorrect values and do not measure correctly will definitely lead to increased energy consumption.
Recycle
Although S/R and B type wires lose their T/C properties when exposed to gas, they are subject to recycling due to the precious metal alloys they contain. The values of the scrap S/R and B type T/C wires you accumulate can be determined by current market conditions and sold back to our company.
Alumina (A1203) sheath dimensions
Although different sizes can be provided according to your special needs, the following sizes are available in stock.
C610 (KER610)
OD:24mm x ID:19mm
OD:15mm x ID:11mm x L:1030mm
OD:10mm x ID:7mm x L:1030mm
C799 (KER710)
OD:24mm x ID: 18mm
OD:15mm x ID:11mm x L:1030mm
OD:10mm x ID:7mm x L:1030mm
