Fabricated Thermocouple for chemical industry, machinery manufacturing
As temperature sensors, fabricated thermocouples are used with display instruments, recorders, electronic regulators. They measure temperatures ranging form 0 ℃-800 of liquid, vapor, gas medium, and solid surfaces.
Fabricated thermocouple is mainly composed of temperature-sensing element, fixed install devices, and junction box.
B, S, K, E
|Type||Code||Graduation||Measurement Range||Limit of Error|
|Ni Cr - Cu Ni||WRK||E||0-800℃||±0.75%t|
|Ni Cr - Ni Si||WRN||K||0-1300℃||±0.75%t|
Note: t is the actual temperature value of temperature-sensing element
|thermal inertia grade||time constant (sec.)|
◆Nominal pressure: generally refers to rupture at operating temperature protection tube can withstand a static external pressure.
◆Minimum insertion depth: not less than 8-10 times the external diameter of its protective casing (except special products)
◆ Insulation resistance: When the ambient air temperature is 15-35 ℃, relative humidity <80%, insulation resistance≥5 MQ (voltage 100V). Thermocouple junction box with a splash, when the relative temperature is 93 ± 3 ℃, insulation resistance ≥0.5 MQ (voltage 100V)
◆insulation resistance in high temperature: insulation resistance among the thermal electrode (including double-supported), protective tube and double thermode should be greater than the value specified in the following table.
|operating temperature||Test Temperature(℃)||insulation resistance(Ω)|
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