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ECD Thermosphere Collective IQ

The ECD Thermosphere Collective IQ is a collaboration of shared intelligence with Thermal Measurment as the primary focus.

 
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Thermocouple Attachment Methods

Posted on Apr 29, 2009

Thermocouple Attachment: Cyanoacrylate (Super Glue)

Cyanoacrylate glue is sometimes used but is not the best

What are some advantages of Cyanoacrylates?

  • It is easy to apply
  • Hardens quickly
  • Easy to remove
  • Available on most manufacturing floors
  • Makes an OK wire strain relief

What are some of the problems with Cyanoacrylates?

  • Not made to take solder temperatures
  • Tends to "evaporate" at solder temp and will burn away with repeated runs resulting in increasing temperature readings with each use
  • Is a good insulator, so if too thick, will suppress the temperature value.
Superglue Thermocouple Attachment

Thermocouple Attachment: UV Cure Epoxy®

UV Cure Epoxy® provides solid contact with very short cure times

What are some advantages of UV Cure Epoxy?

  • Stable – good long term
  • Cures in 10 seconds
  • Can be attached to metals and plastics
  • Does not require heating to cure

What are some of the disadvantages of UV Cure Epoxy?

  • Requires about $1,500 to $2,000 UV light source
  • Difficult to remove without damaging product
  • Difficult to recover thermocouple
UV Cure Epoxy Thermocouple Attachment

Thermocouple Attachment: Aluminum Foil with Kapton Tape

Aluminum foil promotes solid contact with surfaces – Kapton tape adds adhesion insurance

What are some advantages of Aluminum Foil Framed in Kapton Tape?

  • Easy to remove without damage to product
  • Stable – good long term
  • Allows use of smaller pieces of foil while maintaining adhesion

What are some of the disadvantages of Aluminum Foil Framed in Kapton Tape?

  • Two step operation requires more time
Aluminum Foil with Kapton Tape Thermocouple Attachment

Thermocouple Attachment: Epoxy Air Cured

Air Dry Epoxy provides solid contact but requires time to cure

What are some advantages of Epoxy?

  • Stable – good long term
  • Can be attached to metals and plastics
  • Easy to see

What are some of the disadvantages of Epoxy?

  • Proper cure may require hours
  • Difficult to remove without damaging product
  • Difficult to recover thermocouple
Epoxy Air Cured Thermocouple Attachment

Thermocouple Attachment: Aluminum Foil

Aluminum foil promotes solid contact with surfaces

What are some advantages of Aluminum Foil?

  • Easy to apply
  • Easy to remove without damage to product
  • Stable – good long term
  • Accurate – Can be attached to very small components

What are some of the disadvantages of Aluminum Foil?

  • Does not work well with very small contact areas such as component leads
  • Cannot see through it to know where thermocouple is placed
Aluminum Foil Thermocouple Attachment

Thermocouple Attachment: High Temperature Solder

High temperature solder is probably the most stable method of attachment

What are some advantages of High Temperature Solder?

  • Stable – long term with proper metal surfaces
  • Accurate – Can be attached to very small components

What are some of the disadvantages of High Temperature Solder?

  • Does not stick to many materials
  • May affect solder joint alloy composition
  • Expensive
  • Soldering skill required
High Temperature Solder Thermocouple Attachment

Thermocouple Attachment: Temprobe®

The Temprobe is the easiest to use and remove attachment method

What are some advantages of Temprobe?

  • Quick and easy to attach and remove
  • Works well on “wet” solder paste
  • Does not damage product
  • Can be attached to metals and plastics
  • Sheathed construction protects thermocouple

What are some of the disadvantages of Temprobe?

  • Requires 1/2- 3/4 inch vertical clearence above board in oven
Temprobe Thermocouple Attachment

Thermocouple Attachment: Kapton tape

Kapton tape is probably the most widely used method of attachment

What are some advantages of Kapton tape?

  • Easy to attach
  • Easy to remove
  • Low cost
  • Commonly used material
  • Available on most manufacturing floors Transparent
  • Allows accurate placement of thermocouple

What are some of the problems with Kapton tape?

  • Stability- Can lift when heated
Kapton tape Thermocouple Attachment
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