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General Instrument products are made with fine precision, latest automation, and by qualified professionals. They are tested and certified as per industry standards' organizations. Our products are pre-approved on most large company procurements world-wide.

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Retractable Type Tube Skin Thermocouples


Conventional Tube Skin Thermocouple is to be welded to the heater tube. As this is hot working on heater tube, it poses several problems in terms of maintenance and longer shut down time. Each and every time a conventional tube skin thermocouple is installed, the heater tubes are required to be pressure tested as it has undergone welding. General retractable type thermocouples make replacement of thermocouple possible without any welding or any hot work on the tube. This results in significant amount of saving in terms of time as well as shut down costs. 


Faster response Longer lengths can be offered Pliable and easily routed Available in SS316, SS310, Inconel® 600, Incoloy® 800, SS446 sheath materials 


• Calibration

• Nitrogen leak test

• Response time test/Thermal
   Cycling/Thermal Inertia

• Insulation resistance Test at ambient at
   500VDC(MI Type)

• Insulation resistance Test at 540 deg
   cent at 500 VDC

• Continuity Test 


• Grounding & Ungrounding Junction

• Ductility

• Sheath Integrity Test

• Dye Penetration Test

• Flame Test

• Helium Leak Test 



Instruments Manufacturers,

Original Equipment Manufacturers,

Cement, Pharmaceutical,

Oil Exploration/Refineries/Petrochemicals Chemical Fertiliser Pulp & Paper Power Generation Metallurgy Synthetic Fiber 


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