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Type “T” Thermocouple
Ultra-Premium quality thermocouples for use in pharma and biotech industries. Our type “T” thermocouples are ideal for steam autoclaves, CIP/SIP, WFI, incubators, refrigerators and freezers, liquid nitrogen applications, lyophilization and many other critical environments.
In demanding applications, thermocouples are subject to heavy thermal loads and often have to endure rough handling by users. Repeated bending or cold forming of a thermocouple can lead to stress and deformation of the wires' crystalline structure, thereby causing measurement errors. Our thermocouples use wires made from materials with the highest purity and uniformity to minimize measurement errors due to cold forming and material inconsistencies.
Benefit by highest quality of our type T thermocouples:
- Highest material purity and uniformity
- Maximum measurement accuracy
- Durable with a long operating life
- Individual lengths available
Ultra-Premium Type “T” Thermocouple
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Types of type T thermocouples
The ultra-premium type “T” thermocouple wire is available in 3- and 7-strand versions, which are coated with a clear PTFE outer insulation.
The three-stranded wire is used where limited space is available or where the wire needs to be routed through tight openings such as plastic tubes or terminated in a small filter housing. It has an outer diameter of 1.88 mm and can be used in temperatures ranging from -196 ºC (liquid nitrogen) up to a temperature of +200 ºC. The seven-stranded wire has an outside diameter of 3.05 mm and is used where additional strength of the probe is required.
- 3-strand Litz wire: ideal where flexibility and diameter of the lead are a priority, such as when feeding wires through door seals.
- 7-strand Litz wire: typically used where particular emphasis needs to be placed on robustness and mechanical stability
Thermocouples with Kapton jacket for temperatures up to 350 °C are also available on request (can only be used in dry conditions).
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What is a thermocouple?
Thomas Johann Seebeck discovered that connecting two conductors of different materials and applying a different temperature at this connection point will result in a voltage drop at the other end of the conductors, which is related to the temperature change. This Seebeck effect (also called the thermoelectric effect) allows construction of a temperature measuring sensor (= thermocouple) from 2 wires of different materials.
8 materials are of particular importance, as they can be combined to achieve different temperature ranges and accuracy classes, as listed in standards such as IEC60584 and ASTM E230. These different thermocouple compositions are denoted by the letters J, K, E, T, R, S, B and N.
When using thermocouples to measure temperature, cold junction compensation must also be considered. As already described above, the thermoelectric effect is based on two different materials (e.g. copper and constantan) generating a difference in potential at the tip of the thermocouple - the “hot junction”. Since a thermocouple wire, however, also needs to be connected to a measuring device whose electrical connections are usually made of copper, a second thermoelectric effect exists at this “cold junction”, where again two different materials make contact. Therefore, the overall generated voltage consists of the voltage generated at the measuring tip, offset with the voltage drop occurring at the meter side (cold junction compensation).
3-strand Litz wire | 7-strand Litz wire | |
Type |
Type "T" Thermocouple |
Type "T" Thermocouple |
Quality |
Ultra Premium |
Ultra Premium |
Wire |
Copper-constantan |
Copper-constantan |
Jacket |
transparent Teflon® |
transparent Teflon® |
Temperature range |
-196 °C to +200 °C |
-196 °C to +200 °C |
Accuracy at 40 °C at 121 °C |
±0,1 °C ±0,3 °C |
±0,1 °C ±0,25 °C |
maximum outside diameter |
1,88 mm |
3,05 mm |
length |
4, 6, 10 meters and individual lengths |
4, 6, 10 meters and individual lengths |
Autobond thermocouples
Our Autobond thermocouples are designed for all extreme humidity applications. Especially in steam applications (sterilization) under pressure, condensation moisture penetration through the insulation can become a problem. The specially manufactured ultra-premium grade Autobond thermocouples reduce condensate penetration by up to 90% compared to conventional standard insulation.
Autobond thermocouples have the same accuracy and uniformity specifications as standard ultra-premium wire and is available as standard 22 AWG 7-strand wire. Autobond wire can be used for any application and has an approximate temperature range of -200 °C to +200 °C.
Stainless Steel Feed-Thru Fittings
The TÜV-approved Stainless Steel Feed-Thru fittings from CiK are ideal for guiding thermocouples easily in a compact and tidy fashion into pressure/vacuum vessels such as autoclaves, pipes, conduits, and many more. Up to 18 thermocouples can be seated individually in the feed-thru, a lid is then sealed through a sophisticated bayonet fitting with a safety catch – and that is all that's required.
Maximum tightness can be achieved via a silicone double seal combined with a contact pressure screw. The feed-through can be installed in vessels up to a maximum pressure of 5 bar and a maximum temperature of 150 °C. Connection to the pressure vessel is via standard 1 ½ “ tri-clamp fitting.
The stainless steel feed-through is simple, tidy and compact, making it ideal for thermocouple applications in high pressure or vacuum environments such as steam autoclaves, process lines and many more. Up to 18 individual thermocouples can be used with this design, mounted on an elegant, securely locked bayonet fitting. The maximum pressure is achieved via a silicone twin gasket, combined with a clamping screw.