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Thermocouple Types and Comparison | Thermocouple of 8000-liter storage tank | Comparison of Thermocouple Types

Comparison of Thermocouple Types

Thermocouple types and probes and thermocouple cables used for measurement of temperature, mode of furnace thermocouple working and high-temperature thermocouple working procedure, and the functioning of the thermistor. Calibration of temperature sensors, the material of construction of various thermocouples based on the utilization, mechanism of fitting the thermocouple to the process equipment, and working principle of thermocouple testing. B, E, J, K,R, S, T types of thermocouple comparison

Sr noTypePositive wireNegative wireTemperature range 0CLinearity
1BPt-70—Rh-30Pt-94—Rh-60 to 1860Good at high temperature
2EChromeConstantan-196 to 999Good
3JIronConstantan-196 to 760Nearly linear between 149 to 438
4KChromeAlumel-190 to 1371Most linear
5RPt-87—Rh-13Platinum-18 to 1704Good at high temperature
6SPt-90—Rh-10Platinum-18 to 1760Good at high temperature
7TCopperConstantan-190 to 399Same as J
8Tungsten WW 74 –Re 26-18 to 2316Good at high temperature
9W 94 –Re 6W 74 –Re 26-18 to 2316Good at high temperature
10CopperGold – Cobalt-268 to -18Linear above 60k
11Ir 40- Rh 60Ir-18 to 2093Good at high temperature

Pt- Platinum
Rh- Rhodium
W- Tungsten
Re- Rhenium

In various corrosive environments, the instrument should function and measure the temperature, for that purpose a list of the thermocouple will help to determine the right suitable temperature-measuring instrument.

Sr noTypePositive wireNegative wireSuitable atmosphere
1BPt-70—Rh-30Pt-94—Rh-6Inert or slow oxidizing
5RPt-87—Rh-13PlatinumOxidizing (fast response)
7TCopperConstantanOxidizing or reducing(good corrosion resistance)
9Tungsten WW 74 –Re 26Inert or vacuum(high temperature)

Transportation of 8000-liter storage tank; Report

Report: Storage tank of lightweight with an 8000-liter capacity is been transported by a transportation truck ignoring the safety rules. The tank is placed horizontally and supported with some sandbags to prevent it from rolling out. Four supporting bars are welded temporarily along the length of the outer surface of the tank on either side of the truck platform. Transporters follow their thumb rule to decrease the transportation charges, neglecting the risk and safety issues. This type of practice is not allowed in developed countries but is frequently seen in developing countries.

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Aanchal Gupta

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