Platinum Thermocouples

Replaces our standard type k thermocouples

The standard thermocouple used on the DynaTrol is Type K. The most common thermocouple configuration that we use is an 8 gauge exposed Type K thermocouple covered by a mullite ceramic protection tube (standard on Easy-Fire, Jupiter, Liberty-Belle, School-Master, Doll and DaVinci).

The best high temperature thermocouple is a type S

  • The very best thermocouple for constant high fire applications is a Type S platinum thermocouple with an alumina sheath.
  • This is normally only recommended for the most extreme conditions (like firing crystalline glazes) because of its expense - or if the value or precision of your work is such that you do not want to risk thermocouple drift.
  • You can special order a DynaTrol with Type S thermocouples. They are not available for the One-Touch™ control.

Technical information

  • Type S thermocouples are composed of a positive leg which is 90% platinum and 10% Rhodium, and a negative leg which is 100% platinum.
  • It is usable from 32°F to 2700°F. (0°C to 1480°C).
  • It has a different EMF output than Type K thermocouples (meaning the same temperature will produce different voltages to the control which must then be interpreted differently).
  • That different scale requires both a simple hardware configuration change and a software change to take effect so it can not be done inadvertently.
  • At temperatures used in pottery kilns (even the highest 2350°F) these thermocouples can last for a very long time (as long as they are not mechanically broken).

Retrofitting a control with type k thermocouples

  • This is not a retrofittable option on DynaTrols used before Jan 1, 2006.
  • On the newer 700 DynaTrol boards it is possible to switch from Type K to Type S with a programming change and a jumper change.
  • You MUST also change the thermocouple extension wire from Type K wire to Type S wire.


  • The Type S thermocouples that we provide have a 5/16" OD alumina sheath.
  • They are ungrounded.
  • There are two lengths: 120mm (4.75") and 160mm (6.3")
  • Termination is in a ceramic terminal block.

Which thermocouples are used on which kilns

  • One 120mm thermocouple is used on the Doll
  • Two 120mm thermocouples are used for any two section (18" high) Easy-Fire, Jupiter, eFL Series or DaVinci kiln
  • Three 120mm thermocouples on all other Easy-Fire, Jupiter, eFL Series or Davinci kilns.
  • EL2424 kilns use two. EL2427 and all other Easy-Load kilns use three. All front-loading kilns use 160mm TCs.
  • Type S thermocouples are not available on the School-Master, Liberty-Belle, Doll or Renaissance kilns if fitted with a Bartlett 3 Button control or the One-Touch™ control.
  • These are included as standard equipment on the JH Series Kilns.

Important Note

  • If you have a Type S thermocouple or are retrofitting an older kiln with a Type S thermocouple the control must be configured for use with Type S thermocouples. If not the kiln could seriously overfire and melt down. See this for more information...

Type S thermocouple

Name SKU Price
Type S Upgrade for 1 thermocouples T-G-S001/UG $335.00
Type S Upgrade for 2 thermocouples T-G-S002/UG $675.00
Type S Upgrade for 3 thermocouples T-G-S003/UG $1,000.00