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Temperature is the most important measurement of all efficient industrial processing. Its is the most convenient and versatile device used to measure temperature in power plant, metal melting furnaces, salt baths, industrial process control, laboratories & numerous other applications as sensing devices for measurement control and recording of temperature from -200oC to +1800oC.    

Thermocouple is based on “Thermoelectric Effect” i.e., when any conductor (such as a metal) is subjected to a thermal gradient, it will generate a voltage.

Thermocouples measure the temperature difference between two points, not absolute temperature. In traditional applications, one of the junctions—the cold junction—was maintained at a known (reference) temperature, while the other end was attached to a probe.

FEATURES

  • High accuracy of temperature measurement

  • Excellent stability and responsibility

  • High sensitivity for narrow measuring span

  • Designed for fast response

  • Interchangeable to any standard make (indigenous or imported)

  • Complete temperature range upto 1800

  • Comprehensive range of diameters, length and end seal configurations

  • Simplex, duplex and triplex element assembly

TYPES OF THERMOCOUPLES

  • Ceramic twin/four bore Insulated thermocouples

  • Bolt Thermocouple

  • Hand Held Thermocouples

  • Adjustable Ring Thermocouple

  • Moving Surface Thermocouples

  • Mineral Insulated Metal Sheathed Thermocouples

  • Heavy Duty Industrial Metal Sheathed Thermocouples

  • High Temperature Industrial Ceramic, Sintered Alumina and Silicon Carbide Thermocouples

  • Multi Junction Thermocouple Probes

  • Washer thermocouples

  • Thermocouple with special outer sheaths like Silicon Carbide with Tungsten Carbide coated, Glass enamel, PTFE, PVDF coated- explosive proof

THERMOCOUPLE COMPARISON
 
TYPES

TEMP. RANGE (OC)
CONTINUOUS

TEMP. RANGE (OC)
SHORT TERM

TOLERANCE
CLASS A (
OC)

TOLERANCE
CLASS B (
OC)

lec COLOUR
CODE

K 0 to +1100 -180 to +1300 ±1.5 between −40 °C and 375 °C
±0.004×T between 375 °C and 1000 °C
±2.5 between −40 °C and 333 °C
±0.0075×T between 333 °C and 1200 °C
J 0 to +700 -180 to +800 ±1.5 between −40 °C and 375 °C
±0.004×T between 375 °C and 750 °C
±2.5 between −40 °C and 333 °C
±0.0075×T between 333 °C and 750 °C
N 0 to +1100 -270 to +1300 1.5 between −40 °C and 375 °C
±0.004×T between 375 °C and 1000 °C
±2.5 between −40 °C and 333 °C
±0.0075×T between 333 °C and 1200 °C
R 0 to +1600 -50 to +1700 ±1.0 between 0 °C and 1100 °C
±[1 + 0.003×(T − 1100)] between 1100 °C and 1600 °C
±1.5 between 0 °C and 600 °C
±0.0025×T between 600 °C and 1600 °C
S 0 to +1600 -50 to +1750 ±1.0 between 0 °C and 1100 °C
±[1 + 0.003×(T − 1100)] between 1100 °C and 1600 °C
±1.5 between 0 °C and 600 °C
±0.0025×T between 600 °C and 1600 °C
 
B +200 to +1700 0 to +1820 Not Available ±0.0025×T between 600 °C and 1700 °C

No standard use copper wire

T -185 to +300 -250 to +400 ±0.5 between −40 °C and 125 °C
±0.004×T between 125 °C and 350 °C
±1.0 between −40 °C and 133 °C
±0.0075×T between 133 °C and 350 °C
E 0 to +800 -40 to +900 ±1.5 between −40 °C and 375 °C
±0.004×T between 375 °C and 800 °C
±2.5 between −40 °C and 333 °C
±0.0075×T between 333 °C and 900 °C
Chromel/
AuFe
-272 to +300 n/a

Reproducibility 0.2% of the voltage; each sensor needs individual calibration.

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