Products

High Temperature Thermocouple with Pot Seal

High Temperature Metal Sheathed Thermocouples (Type 27)

These high temperature thermocouples are used in applications where other thermocouples would fail due to excessive heat or severe environments. Utilising specialist exotic sheath materials such as Platinum 10% Rhodium, Molybdenum and Tantalum they can be used in service temperatures up to 4170°F. The combination of conductor, insulation material and sheath must be carefully selected to suit your process environment, service temperature and installation requirements (ie. whether the probe is flexible or not). Our experienced sales team are on hand to assist where required so please contact us if help is required.
  • Typically used with high temperature thermocouple types R, S, B, C and D
  • Temperatures up to 3990°F (continuous) or 4170°F (short term)
  • Semi-Rigid (mineral insulated) and Rigid (tube) styles available
  • Terminated in a pot seal, with a selection of extension cables
  • Calibration service for oxidizing and inert environments up to 3970°F

Code Sheath Material Operational Properties MI (Semi-Rigid)
Tube (Rigid)
Insulation Material Thermocouple Types Available Sheath Diameters (mm) Max.
Continuous Temperature
600

Inconel 600®

Suitable for use in inert, vacuum and oxidizing environments.
Minimum bend radius: 5 x sheath diameter.

Not recommended for use above 1470°F in oxidising atmospheres. Do not use in sulphur bearing atmospheres above 1020°F.
Semi-Rigid MgO R, S and B 0.040”, 0.062”, 0.125”, 0.188” and 0.250” 2140°F
600T Inconel 600® As above. Do not bend. Rigid Al2O3 R, S and B 0.125”, 0.188” and 0.250” 2140°F
P10R Platinum 10% Rhodium Suitable for use in inert and oxidizing environments.
Minimum bend radius: 10 x sheath diameter.
Semi-Rigid MgO R, S and B 0.040” and 0.062” 2820°F
TAN Tantalum Suitable for use in inert and vacuum environments.
Minimum bend radius: 5 x sheath diameter.
Semi-Rigid MgO, Al2O3, HfO2 R, S, B, C and D 0.040”, 0.062” and 0.125” 3990°F
NIO Niobium 1% Zirconium Suitable for use in inert and vacuum environments.
Minimum bend radius: 10 x sheath diameter.
Semi-Rigid MgO, Al2O3, HfO2 R, S, B, C and D 0.062” and 0.125” 3990°F
MOL Molybdenum Suitable for use in inert, vacuum and reducing environments.
Do not bend.
Rigid MgO, Al2O3, HfO2 R, S, B, C and D 0.062”, 0.125”, 0.188” and 0.250” 3630°F
CMOL Coated Molybdenum Suitable for use in inert and oxidizing environments.
Do not bend.
Rigid MgO, Al2O3, HfO2 C and D 0.062”, 0.125” and 0.250” 2910°F

High Temperature Thermocouple Enquiry Form

1. Thermocouple Type
2. Sheath Material (see above)
3. Insulation Material
4. Sheath Diameter
5. Sheath Length
 inches
6. Types of Sensing Junction

Illustration Select
INSULATED Junction
GROUNDED Junction
Duplex Element Required? (please tick box)
7. Pot Seal Style

Illustration Select
Crimp on St./St. Pot Seal
(sheath diameters up to 0.118")
Pot Seal with Anti Chafe Spring
(sheath diameters up to 0.118")
Crimp on St./St. Pot Seal
(sheath diameters 0.118" to 0.250")
Pot Seal with Anti Chafe Spring
(sheath diameters 0.118" to 0.250")
St./St 8mm ISO x 1mm
Threaded Pot Seal
(sheath diameters up to 0.118")

End Seal Temperature Rating:

8. Extension Leads

Illustration Select
HR PVC Twisted Pair with Screen
(Stranded 24AWG, rated to 220ºF)
PFA Flat Twin
(Solid 24AWG, rated to 480ºF)
PFA Flat Twin
(Stranded 24AWG, rated to 480ºF)
PFA Twisted Pair with Screen
(Stranded 24AWG, rated to 480ºF)
Fiberglass Flat Twin
(Solid 24AWG, rated to 896ºF)
Fiberglass Flat Twin
(Stranded 24AWG, rated to 896ºF)
Fiberglass Flat Twin with St./St. Braid
(Stranded 24AWG, rated to 896ºF)
HT Fiberglass Flat Twin with St./St. Braid
(Stranded 32AWG, rated to 1470ºF)
PVC 2-Pair - for Duplex Sensors
(Stranded 24AWG, rated to 220ºF)
PFA 2-Pair - for Duplex Sensors
(Stranded 24AWG, rated to 480ºF)
Please enter Cable length in feet

 ft
9. Optional Connector


Connector Style:




Connector Temperature Rating:
10. Quantity Required


Contact Details

Company Name


Your Name


Title/Dept.


Email


Telephone


Additional Information

If your enquiry is for more than one style of sensor, please email us with your requirements or use the box below



Send Enquiry  


BACK TO TOP
Products

Contact Us

About TC

FREE Guide

Privacy Policy

Terms and Conditions

Sitemap
FREE Wallchart Guide

Join over 500,000 engineers and buyers who have already received our FREE 74 page A3 Guide to Thermocouple and Resistance Thermometry

Company Name
  Address 1
Your Name
  Address 2
Title / Dept.
  State
Email
  ZIP Code
Telephone
  Country
Company Name
Your Name
Title / Dept.
Address 1
Address 2
State
ZIP Code
Country
Email
Telephone

We will only ever use the information you provide to occasionally contact you regarding our products and we will never disclose your details to a third party. Our privacy policy can be viewed here



I agree to the terms and conditions listed in the Privacy Policy

View our ISO 90001/2008 Certficate



© 2006- TC Measurement and Control Inc., PO Box 685, Hillside, IL 60162, United States
Tel.: 877 249 1777, Fax: 708 449 0777, Email: info@tc-inc.com



1 Thermocouple Type Temperature Range (continuous) Temperature Range
(short term)
R Platinum - 13% Rhodium vs
Platinum
32 to +2820°F -60 to +3180°F
S Platinum - 10% Rhodium vs
Platinum
32 to +2910°F -60 to +3090°F
B Platinum - 30% Rhodium vs
Platinum 6% Rhodium
212 to +2910°F 212 to +3310°F
C Tungsten - 5% Rhenium vs
Tungsten - 26% Rhenium
120 to +3330°F 68 to +4170°F
D Tungsten - 3% Rhenium vs
Tungsten - 25% Rhenium
120 to +3330°F 68 to +4170°F
Temperature ranges refer to the thermocouple type.
The temperature range of the sensor may deviate from the above,
please refer to the product description for more details
2 Insulation Material Comments Max.
Temperature
MGO

Magnesium Oxide
MgO

Very hygroscopic. Used mostly in compacted sheaths. 3090°F
ALO Aluminium Oxide
Al2O3
Excellent with Platinum alloys. 2820°F
HFO Hafnium Oxide
HfO3
Comparible to Berylium Oxide and safe to handle. 3990°F
* Please refer to the Sheath Material table above for applicable diameters

INSULATED
Hot junction insulated from sheath. Gives floating output with typical insulation resistance in excess of 100 megohms

GROUNDED
Hot junction welded to sheath tip giving earthed output and faster response to temperature changes


Assemblies with pot seals are supplied with short tails as shown. However, where leads are several metres or more long, it is more suitable to have an overall sheathed cable. We recommend the following cables, which are 7/0.2mm, laid flat and overall sheathed constructions. Other cables are available, please contact us for details.