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Assembly thermocouple




The factory mainly produces thermocouples, thermal resistance and other primary instruments, and the assembled thermocouples are manufactured using international IEC standards. At the same time, the series and type spectrum designed by the thermocouple of the Ministry of Machinery and Electronics Industry are used.

Overview

Industrial fabricated thermocouples are commonly used as temperature measuring transmitters in conjunction with display instruments, recording instruments and electronic regulators. They can directly measure liquid, vapor and gaseous media from 0 ° C to 1800 ° C in various production processes. And the surface temperature of the solid.

According to national regulations, our company produces fabricated thermocouples of platinum iridium 30-platinum iridium 6, platinum iridium 10-platinum, nickel chrome-nickel silicon, nickel chrome-constantan, etc. in accordance with IEC international standard graduation numbers.

Assembly thermocouples usually consist of main components such as temperature sensing components, mounting fixtures and junction boxes.

Optional model

Type B, S type, K type, E type

The main technical parameters

Measurement range and basic error limit

Classification of thermocouplesCode nameGraduationmeasuring rangeBasic Error Limit
Nickel-chromium-constantanWRKE0-800℃±0.75%t
Nickel-chromium-nickel-siliconWRNK0-1300℃±0.75%t
Platinum rhodium 13-platinumWRBR0-1600℃±0.25%t
Platinum rhodium 10-platinumWRPS0-1600℃±0.25%t
Pt-Rh 30-Pt-Rh 6WRRB0-1800℃±0.25%t
Note: t is the measured temperature value of temperature sensor(℃)

Thermocouple time constant

Thermal inertia levelTime constant (seconds)Thermal inertia levelTime constant (seconds)

90-180

10-30

30-90

<10
  

Thermocouple nominal pressure: generally refers to the static external pressure that can be withstood by the protective tube at the working temperature.

◆The minimum insertion depth of the thermocouple: it should be no less than 8-10 times of the outer diameter of the protective sleeve (except for special products)

◆Insulation resistance: When the ambient air temperature is 15-35 ° C, the relative humidity <80%, the insulation resistance ≥ 5 megohms (voltage 100V). Thermocouple with splash-proof junction box, insulation resistance ≥0.5 megohms (voltage 100V) when the relative temperature is 93±3°C

◆Insulation resistance at high temperature: When the thermocouple is at high temperature, the insulation resistance (in meters per meter) between the hot electrode (including the double-branch) and the protection tube and the double-branch electrode should be greater than the values specified in the table below.

Regulated long-term service temperature(℃)

Test temperature(℃)

Insulation resistance value(Ω)

≥60060072000
≥ 80080025000
≥100010005000




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    General manager:Manager Shi   Mobile:13918773239  ADD:No. 1260 Lane 21 Sanzao Road, Pudong New Area, Shanghai, China    TEL:0086-021-50187613      FAX:0086-021-51567138      EMAIL:sales03@sh9t.com
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