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TC Ltd for Temperature Measurement & Control

EAC Ex Approved Thermocouples for the Petrochemical, Oil and Gas Industries

with Pot Seal

Send Enquiry Data Sheet Request Info

Also available with ATEX Approval Also available with IECEx Approval
Our EAC Ex mineral insulated thermocouple assemblies are manufactured from cable that conforms to IEC 61515 and their semi rigid construction allows them to be bent and formed to suit particular applications without impairing performance. An adjustable threaded compression fitting is required to achieve approval.
  • Available in a wide range of protection concepts for Zones 0, 1 & 2 use. See table below for details
  • Temperature classification T6-T1, see here for stand-off requirements
  • Available in thermocouple types K, T, J, N, E, R, S and B
  • Metrological / Pattern Approval Certificate (PAC) for Russia also available on request, contact us for details
  • Additional Primary verification “POVERKA” available on request, contact us for a quotation if required
  • Sheath diameters from 0.5mm to 8.0mm in a wide choice of materials
  • Insulated measuring junction gives a floating output with high insulation resistance
  • PVC or PFA insulated twisted extension cables. Other cables available.
  • UKAS calibration available.
Available with the following approvals:

Protection Type Description Zone
Ex d IIC Gb Flameproof (Gas) 1
Ex ia IIC Ga / IIIC Da Intrinsically Safe (Gas/Dust) 0/20
Ex tb IIIC Db Enclosure (Dust) 21
Ex tc IIIC Dc Enclosure (Dust) 22



Enquiry Form

1. Thermocouple Type

2. Protection Concept

Concept Type Select
Ex d Flameproof/Explosion Proof
Ex ia Intrinsically Safe
Ex tb Enclosure
Ex tc Enclosure
Your chosen concept is:

Ex d Flameproof/Explosion Proof – Category 2, Zones 1,2 (Gas)
• Ex d IIC T6...T1 Gb Ta = –40°C to 60°C
• Standard EN IEC 60079-1 refers
• Designed to contain an explosion and quench the flame
• Sensors incorporate a suitable heavy duty enclosure or threaded fitting with tight seals
Your chosen concept is:

Ex e Increased Safety – Category 2, Zones 1,2 (Gas)
 • Ex e IIC T6...T1 Gb Ta = –40°C to 60°C
• Standard EN IEC 60079-7 refers
• Design ensures no arcs, sparks or hot surfaces that could ignite an explosive mixture with a minimum IP54 enclosure rating
• Sensors incorporate a suitable heavy duty enclosure or threaded fitting with tight seals
Your chosen concept is:

Ex ia Intrinsically Safe – Category 1, Zones 0,1,2 (Gas) & 20,21,22 (Dust)
 • Ex ia IIC T6...T1 Ga Ta = –40°C to 60°C
• Standard EN IEC 60079-11 refers
• Designed to limit the energy of arcs or sparks that could potentially ignite an explosive mixture
• Sensors used in this area must be wired through a suitably approved barrier
• Optional approved 4 to 20mA transmitters available
Your chosen concept is:

Ex nA Non-Sparking – Category 3, Zone 2 (Gas)
 • Ex nA IIC Gc T6…T2
• Standard EN IEC 60079-15 refers
• No arcs, sparks or hot surfaces
Your chosen concept is:

Ex tb Enclosure – Category 2, Zones 21, 22 (Dust)
 • Ex tb IIIC T80°C…T440°C Db
• Standard EN IEC 60079-31 refers
• Protects against combustible and conductive dusts, rugged tight enclosures are used
Your chosen concept is:

Ex tc Non-Sparking – Category 3, Zone 22 (Dust)
 • Ex tc IIIC T85°C...T450°C Dc
• Standard EN IEC 61241 refers
• Protects against combustible dusts
• Sensors incorporate a suitable heavy duty enclosure with IP6X seal
3. Sheath Material

4. Sheath Diameter

5. Sheath Length

 mm*
6. Types of Sensing Junction

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

Illustration Select
Crimp on St./St. Pot Seal
(sheath diameters up to 3mm)
Crimp on St./St. Pot Seal
(sheath diameters 3mm to 8mm)
8. Extension Leads

Illustration Select
PVC (rated to 105ºC)
End Seal rated to 90ºC
PFA (rated to 250ºC)
End Seal rated to 230ºC
Colour Codes available to IEC 60751
Please enter Cable length in metres

 mtrs
9. Compression Fitting

10. Quantity Required

Contact Details

Company Name


Your Name


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  
1 Thermocouple Type Temperature Range (continuous) Temperature Range
(short term)
K Nickel Chromium vs
Nickel Aluminium		 0°C to +1100°C -180°C to +1350°C
T Copper vs Constantan -185°C to +300°C -250°C to +400°C
J Iron vs Constantan +20°C to +700°C -180°C to +750°C
N Nicrosil vs Nisil 0°C to +1100°C -270°C to +1300°C
E Nickel Chromium vs Constantan 0°C to +800°C -40°C to +900°C
R Platinum - 13% Rhodium vs
Platinum		 0°C to +1600°C -50°C to +1700°C
S Platinum - 10% Rhodium vs
Platinum		 0°C to +1550°C -50°C to +1750°C
B Platinum - 30% Rhodium vs
Platinum 6% Rhodium		 +100°C to +1600°C +100°C to +1820°C
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 Sheath Material Max.
Temperature
Standard Sheath Materials
321

321 Stainless Steel

800°C
310 310 Stainless Steel 1100°C
600 Inconel 600 1100°C
Specialized Sheath Materials
114 Nicrotherm DTM 1250°C
156 Hastelloy X 1220°C
446 AISI 446 1150°C
800 Incoloy 800 1100°C

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

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.