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Address: Xiongyi, Jinhe Road, Jinhu County, Jiangsu Province
Lunan
Phone: 0517-86900901
0517-86900921
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Postcode: 211600
http://zzyfwh.com
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Thermometers
K-type thermocouple

Overview
作为一种温度传感器,K型热电偶通常和显示仪表,记录仪表和电子调节器配套使用。 Industrial K-type thermocouples are used as a temperature sensor. K-type thermocouples are usually used with display instruments, recording instruments and electronic regulators. Fabricated K-type thermocouples can directly measure the surface temperature of liquid vapor and gaseous media and solids ranging from 0 ° C to 1300 ° C in various productions.
According to national regulations, our company produces assembled thermocouples that conform to the IEC international standard graduation numbers of platinum-rhodium 30-platinum rhodium 6, platinum-rhodium 10-platinum, nickel-chromium-nickel silicon, nickel-chromium-constantan, etc. zzyfwh.com
通常由感温元件、安装固定装置和接线盒等主要部件组成。 K-type thermocouples are usually composed of main components such as temperature sensing elements, mounting fixtures and junction boxes.

Measuring range and allowable error range

Thermocouple category
Code
Index number
Measuring range
Basic error limit
Nickel chromium-constantan
WRK
E
0-800 ℃
± 0.75% t
NiCr-NiSi
WRN
K
0-1300 ℃
± 0.75% t
Platinum Rhodium 13-Platinum
WRB
R
0-1600 ℃
± 0.25% t
Platinum Rhodium 10-Platinum
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 value of the temperature sensing element (℃)

时间常数 K-type thermocouple time constant

Thermal inertness level
Time constant (seconds)
Thermal inertness level
Time constant (seconds)

I

90-180

10-30

30-90

F

<10

Nominal pressure of thermocouple: Generally refers to the static external pressure that the protection tube can withstand at operating temperature and rupture.
Minimum insertion depth of thermocouple: should be no less than 8-10 times the outer diameter of its protective sleeve (except for special products)
Insulation resistance: When the ambient air temperature is 15-35 ° C and the relative humidity is less than 80%, the insulation resistance is ≥5 Megohm (voltage 100V). Thermocouple with splash-proof junction box, when the relative temperature is 93 ± 3 ℃, the insulation resistance is ≥0.5 megohm (voltage 100V)
高温下,其热电极(包括双支式)与保护管以及双支热电极之间的绝缘电阻(按每米计)应大于下表规定的值。 Insulation resistance at high temperature : The insulation resistance (per meter) of the thermocouple (including double-branch) and the protection tube and double-branch hot electrode at the high temperature should be greater than the value specified in the table below.

Specified long-term use temperature (℃)

Test temperature (℃)

Insulation resistance (Ω)

≥600
600
72000
≥ 800
800
25000
≥1000
1000
5000