Thermocouples

Parsjahd Products - Thermocouples

A thermocouple consists of two dissimilar conductors in contact, which produces a voltage when heated. The size of the voltage is dependent on the difference of temperature of the junction to other parts of the circuit. Thermocouples are a widely used type of temperature sensor for measurement and control and can also be used to convert a temperature gradient into electricity.

 


Most Common Type
Insets
Head Output Sensor
Cable Output Sensor
Connector Output Sensor

 

Sensor Types
Thermocouple Types: T, J, K, N, R, S, B

 

Typical Junction
An ungrounded junction
A grounded junction
An exposed (measuring) junction

 

Temperature Limit

Type of thermocouple Code Temperature range
Cu – CuNi T -20 … +350 °C
Fe – CuNi J -20 … +760 °C
NiCr - Ni alloy K -40 … +1,100 °C
Nicrosil – Nisil N 0 … 1,100 °C
Pt - PtRh 13 % R 0 … 1,600 °C
Pt - PtRh 10 % S 0 … 1,550 °C
PtRh 6 % - PtRh 30 % B 100 … 1,600 °C

 

Tolerance class

Type Class 1 Class 2
T

from -40 to +125°C ± 0.5°C
from 125 to 350 °C ± 0.004 x t °C

from -40 to +133°C ± 1°C
from 133 to 350 °C ± 0.0075 x t °C

J

from -40 to +375°C ± 1.5°C
from 375 to 750 °C ± 0.004 x t °C

from -40 to +333°C ± 2.5°C
from 333 to 750 °C ± 0.0075 x t °C

K

from -40 to +375°C ± 1.5°C
from 375 to 1000 °C ± 0.004 x t °C

from -40 to +333°C ± 2.5°C
from 333 to 1200 °C ± 0.0075 x t °C

N

from -40 to +375°C ± 1.5°C
from +375 to +1000 °C ± 0.004 x t °C

from -40 to +333°C ± 2.5°C
from 333 to 1200 °C ± 0.0075 x t °C

R – S

from 0 to +1100 °C ± 1°C
from 1100 to 1600 °C ± (1+0.003x(t-1100)) °C

from 0 to +600 °C ± 1.5°C
from +600 to +1600 °C ± 0.0025 x t °C

B - from +600 to +1700 °C ± 0.0025 x t °C

 

Standard Sensor Diameter
3mm, 6mm, 8 mm, 10mm, 12.7mm
Other sizes on request

 

Sheath Material
S.S. 316
S.S. 310
Incoloy 800
S.S. 446

 

Insertion Length
200mm, 350mm, 500mm, 800mm, …
*insertion length totally is unlimited.

 

Number of sensing Elements
Simple sensor or duplex sensor (for different uses)

 

Electrical Connection
Head connection, terminal block, transmitter, cable, connectors…


Communication
Output quantity format (analogue, digital, communication protocol)

 

Thermo Well
All types of Flanged, Threads, weld-in, Van-Stone are available.
Material range is included S.S 316, Alloy 650, Alloy 800, Monel 400….
*Barstock thermo well and tube type can be supplied based on insertion length.

 

ATEX Version
Intrinsically safe design is available for application in hazardous area.
Others on request