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* AEROPAK is a trade mark for our metal sheathed mineral insulated cable and thermocouples. The AEROPAK construction result in thermocouples wires that are surrounded by a compacted mineral insulation (MgO) and contained in a sheath such as stainless steel or heat resisting steel. On the basis of this AEROPAK construction, a wide variety of otherwise difficult applications are possible. Compared with general-purpose (Protection tube type) thermocouples, sheathed thermocouples have many advantages.
* Basic thermocouple theory
A thermocoupIe is a cIosed Ioop circuit that consists of two dissimiIar metaI wires weIded together at both ends. When a temperatune difference exists between the two junctions, thermaI eIectromotive force (EMF) is generated and an eIectric current fIows in the cIosed circuit. The direction and magnitude of the EMF generated depend upon the tempemture of the two junctions and upon the materials making up the thermocoupIe, and are not affected by the size or Iength of the thermocoupIe wire. Temperatune can be measured by knowing beforehand the change of EMF per degree change of temperature for a certain thermocouple.
Features
AEROPAK thermocouples have the following advantages over conventional protection tube or wire-insulator styles.
1. A wide application in measurement
Small diameter thermocouple is very usefull for the place where space is at premium. AEROPAK construction is resistant to high pressure and also used at wide range of temperature from -200°C to +1050°C.
2. Quick response
AEROPAK thermocouples have small heat capasity due to the small sheath size, The small thermal mass is highly sensitive to change in temperature and gives a very fast response.
3. Easily bent for installation
The ability to form AEROPAK thermocouples on a radius twice the sheath diameter makes for simple and on-the-spot installation into complex configurations.
4. Long life span
Contrary to conventional thermocouples which suffer from deterioration of electromotive force or wire disconnection, etc., AEROPAK thermocouples wires are insulated with chemically stable magnesium oxide, thus assuring a longer service life.
5. Excellent mechanical strength and pressure resistance
The composite construction is resistant to extreamely high vibration levels, and by choosing appropriate sheath material, it is reliable to use in corrosive atmospheres and abnormally high or low temperatures,. Though it has small diameter, it can be withstand 3500kg/cm2 at a temperature of 650°C.
6. Custom sheath outer diameter available
Sheath outer diameter sizes between 0.25mm and 12.7mm can be provided.
7. Custom long length
Length are available up to a maximum of 400m. Maximum length is dependent upon the sheath outer diameter.
8. Compatible with special needs
We have our own factory for making many kinds of metalic sheathed cables, therefore, we can correspond to various needs from customers.
Basic ModelsT35 : Thermocouple with lead cable
| T90 : Thermocouple with type A connector / lead cable 
| | T96N : Thermocouple with connection head / nipple 
| | T97N : Explosion-proof thermocouple with nipple 
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