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Thermocouple
A thermocouple is a junction between two differenrt metals that process a voltage related to a temperature differences.

Looking to improve your temperature sensor measurement with a thermocouple?

Thermocouples are the most common, convenient, and versatile devices used to measure temperature. They convert units of heat into use able engineering units that serve as input signals for process controllers and recorders.  Through selection of appropriate thermocouple wires and sheath components, thermocouples are suitable to be used in temperature ranges from   (-200 to 2316) °C [-328 to 4200] °F.


Thermocouple Weld

A thermocouple consists of a welded 'hot' junction between two dissimilar metals, typically wires - and a reference junction at the opposite ends of the parent materials. Changes in temperature at the measurement junction induce a change in electromotive force (emf) between the other ends.  The EMF appears across the free ends of the thermocouple wires where it is measured and converted into units of heat calibration.

 

Types of Thermocouples

There are two groups, the base metal thermocouples J, K, T, E and N and the precious metal thermocouples R, S, C and B. Each type has a characteristic (emf) vs. temperature curve and application range. The EMF curve is very dependent on the composition of each conductor. Type J and K are the most widely used in industrial applications. Type J (iron vs. copper-nickel (Constantan)) is versatile in that it can be used in both oxidizing and reducing atmospheres up to 1,400°F. Iron rusts at low temperatures where condensation can form. Type K (nickel-chromium (Chromel) vs. nickel aluminum (Alumel) can be used up to 2,300°F in an oxidizing or inert atmosphere.

 

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Our mission

Thermometrics produces a wide range of thermocouples for most market applications, including MgO (Magnesium Oxide), industrial and general purpose types. We also produce thermocouple assemblies for hazardous locations and other applications that require connection heads, protection tubes, thermowells and/or transmitters.

 

Standard Wire Gauge

Standardized Thermocouples

Type B TC in C

Type B TC in F

Type C TC in C

Type C TC in F

Type E TC in C

Type E TC in F


Type J TC in C

Type J TC in F

Type K TC in C

Type K TC in F

Type M TC in C

Type M TC in F

Type N TC in C

Type N TC in F


Type P TC in C

Type P TC in F

Type R TC in C

Type R TC in F

Type S TC in C

Type S TC in F

Type T TC in C

Type T TC in F

 

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Cost of Quality Strategy

  • Identify failure costs and drive them to zero
  • Identify root cause for each failure.
  • Causes can be preventable.
  • Prevention is always cheaper.
  • Install prevention activities to bring improvements.
  • Continuously re-evaluate and redirect prevention efforts to drive improvements.

     

Hidden Costs of Quality

  • Scrap
  • Rework
  • Warranty

Hidden Failure Costs

  • Engineering time.
  • Management time.
  • Downtime.
  • Increased Inventory.
  • Decreased Capacity.
  • Late or Lost Orders.

 

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