Our factory mainly produces assembly thermocouple , thermal resistance, by the international IEC standard production. At the same time, using the series, types and the Ministry of machinery and electronics industry thermocouple unified design spectrum.
Summary of Assembly Thermocouple for Temperature Transmitter
Industrial thermocouple assembly as a measurement of the temperature transmitter usually and display instruments, recording instruments and electronic supporting the use of regulator. It can be up to 1800 ℃ range of liquid, steam and gas and solid medium surface temperature from 0 ℃ direct measurement of the production process.
According to state regulations, thermocouple assembly I produced according to the international standard IEC graduation Pt-Rh Platinum30 - platinum 6-, platinum10- , nickel chromium - nickel silicon, nickel - constantan etc..
The main components of assembly thermocouple usually by temperature sensing element, fixing device and junction box.
Optional Models of Assembly Thermocouple
B type, S type, K type, E type
Main Technical Parameters of Assembly Thermocouple
The measurement range and basic error limit
|
Thermocouple category |
code |
Division No. |
measuring range |
Basic error limit |
|
Chromel - constantan |
|
E |
0－800℃ |
±0.75%t |
|
Chromium - nickel silicon |
WRN |
K |
0－1300℃ |
±0.75%t |
|
Platinum rhodium 13- platinum
|
WRB |
R |
0-1600℃ |
±0.25%t |
|
Platinum platinum-rhodium behaviors |
WRP |
S |
0－1600℃ |
±0.25%t |
|
Platinum Rhodium 30-Platinum Rhodium 6 |
WRR |
B |
0－1800℃ |
±0.25%t |
Note: t is the measured temperature sense component values (c)
Time constant
|
Thermal inertia level |
Constant time (seconds) |
Thermal inertia level |
Thermal inertia level |
|
Ⅰ |
90－180 |
Ⅲ |
10－30 |
|
Ⅱ |
30-90 |
Ⅳ |
<10 |
◆ thermocouple nominal pressure: generally refers to a static outside protective pipe can withstand the pressure and temperature in the work of rupture.
◆ thermocouple minimum insertion depth: should be not less than the protection of 8 - 10 times the outer diameter of the sleeve (the exception list products)
◆ insulation resistance: when the ambient air temperature 15 - 35 ℃, relative humidity below 80% when the insulation resistance of ≥ 5000000000000 euro (voltage 100V). With a thermocouple splash-proof junction box, when the temperature is 93 ± 3 ℃, the insulation resistance of ≥ 500000000000 euro (voltage 100V)
The insulation resistance of a high temperature: thermocouple under high temperature, the thermal electrode (including double branch type) and the insulation resistance between protection tube and double heat electrode (per meter) should be greater than the value specified in the table below.
