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The Type E thermo Pros and Cons:- couple is a commonly used thermocouple which provides stronger signal and higher accuracy as compared to Type K and Type J at moderate temperature range of 1000°F and lower. The Type E has higher stability when compared to type K thermocouple due to which it provide good accuracy.
Has the Highest EMF produced per degree than any other standard
Provide High output (68μV/°C) due to which it is well suited to cryogenic
Provide High Resistance against
It is non-magnetic
Provide wide-range of -50°C to +740°C and narrow range of -110°C to+140°C.
Type E can come in variety of designs suited to differentapplications:-
1) Mineral Insulated Type E:- Metal sheath insulated with magnesium oxide powder also called
2) Cable/Wire Type E:- Flexible sensors in PVC, PTFE or Glass Fibre. Many cold and hot-end
3) Type E with Metal Sheath:- High Temperature design with metalprotection sheath.
4) Type E Inserts:- Rigid metal tubes and ceramic insulators are commonly used in pocket, thermowell or head
In Type E Thermocouple positive leg is composed of approximately 90% nickel, 10 % chromium which is commonly known as Chromel and a negative leg, which is approximately 95% nickel, 2% aluminum, 2% manganese and 1% silicon commonly known as Constantan.
Thermocouple grade wire, -454 to 1600°F (-270 to870°C)
Extension wire, 32 to 392°F (0 to200°C)
Standard: +/- 1.7°C or +/- 0.5°C%
Special Limits of Error: +/- 1.0°C or 0.4°C%
For Cryogenic Applications.
Applications where magnetic fields are generated as E type is non-magnetic in nature
Aerospace industry where fast response is required
Gas temperature measurement in a flow chamber
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