Flameproof Thermocouple Head

Product Details:

“SAIEX” Flameproof Thermocouple Head is a protective enclosure used with a thermocouple sensor, designed to contain and prevent the ignition of surrounding flammable gases or vapors if a spark or high temperature occurs inside the head.

A thermocouple head is the housing mounted at the cold (reference) junction of a thermocouple where:

• Thermocouple wires terminate
• Terminal blocks or transmitters are installed

A flameproof thermocouple head is specially designed so that:

• Any internal explosion (spark, arc, hot surface) is contained inside the enclosure
• Hot gases escaping through joints cool down before reaching the outside
• The surrounding hazardous atmosphere is not ignited

“Flameproof” does not mean fire-resistant—it means explosion containment.

Various Names (Equivalent Terms): Flameproof Thermocouple Head,, Explosion-Proof Thermocouple Head, Ex d Thermocouple Head (IEC terminology), Hazardous Area Thermocouple Head, ATEX-Certified Thermocouple Head, EEx d Thermocouple Head (older IEC term), Weatherproof + Flameproof Head (dual rated)

Gas Group: IIB, Temperature class: T6, Zone: 1/2 & 21/22

IP Protection: IP 66 as per IS/IEC 60529: 2001

Colour: Epoxy Grey 631 (Other option Pebble Grey 7032, 7035 & Pure White 9010)

Gasket: Endless Molded Neoprene (‘O’ Ring)

MOC: Cast Aluminium Alloy LM-6

Earthing: 1 no Inside & 2 nos Outside

Electrical Maximum Rating: 240V AC upto 10Amp., 230V DC

Marking Plate: (Ex db IIB T6 Gb) (Ex tb IIIC T85°C Db)

BSP: ½” BSP (1/2” NPT & ¾” ET)

Bottom Entry: ½” BSP

Accessories: With or Without Cable Gland

Cable Entry Size: M20, ½” NPT, ¾” ET

Cable Entry Nos: 1 or 2 nos

CERTIFICATES: BIS | CIMFR | PESO

STANDARDS: IS/lEC 60079-0:2017 | IS/lEC 60079-1:2014| IS/lEC 60019-31:2013

How It Works

Construction Features

• Thick metal body (aluminum alloy or stainless steel)
• Threaded or flanged joints with precise tolerances
• Flame paths designed to cool escaping gases
• Certified cable entries (Ex d glands)
• Internal terminal block or temperature transmitter

Working Principle

1. Thermocouple generates a small voltage due to temperature difference.
2. This signal reaches the terminals/transmitter inside the head.
3. If a fault causes: Spark, Short circuit, Overheating
4. Any explosion inside the head: Is contained, Escaping gases lose temperature through flame paths, External flammable gas is not ignited

Where it is Used?

They are used in hazardous areas where flammable gases, vapors, or dust may be present.

Typical Industries

• Oil & Gas (refineries, offshore platforms)
• Petrochemical plants
• Chemical processing units
• Power plants
• Fertilizer plants
• Paint and solvent industries
• Mining and metal processing
• Pharmaceutical plants (solvent areas)

Typical Applications

• Furnace temperature measurement
• Reactor vessels
• Heat exchangers
• Boilers
• Distillation columns
• Storage tanks
• Gas pipelines

Product Details:

“SAIEX” Flameproof Thermocouple Head is a protective enclosure used with a thermocouple sensor, designed to contain and prevent the ignition of surrounding flammable gases or vapors if a spark or high temperature occurs inside the head.

A thermocouple head is the housing mounted at the cold (reference) junction of a thermocouple where:

• Thermocouple wires terminate
• Terminal blocks or transmitters are installed

A flameproof thermocouple head is specially designed so that:

• Any internal explosion (spark, arc, hot surface) is contained inside the enclosure
• Hot gases escaping through joints cool down before reaching the outside
• The surrounding hazardous atmosphere is not ignited

Various Names (Equivalent Terms): Flameproof Thermocouple Head,, Explosion-Proof Thermocouple Head, Ex d Thermocouple Head (IEC terminology), Hazardous Area Thermocouple Head, ATEX-Certified Thermocouple Head, EEx d Thermocouple Head (older IEC term), Weatherproof + Flameproof Head (dual rated)

Gas Group: IIB, Temperature class: T6, Zone: 1/2 & 21/22 

IP Protection: IP 66 as per IS/IEC 60529: 2001 

Colour: Epoxy Grey 631 (Other option Pebble Grey 7032, 7035 & Pure White 9010)

Gasket: Endless Molded Neoprene (‘O’ Ring)

MOC: Cast Aluminium Alloy LM-6

Earthing: 1 no Inside & 2 nos Outside

Electrical Maximum Rating: 240V AC upto 10Amp., 230V DC

Marking Plate: (Ex db IIB T6 Gb) (Ex tb IIIC T85°C Db)

BSP: ½” BSP (1/2” NPT & ¾” ET)

Bottom Entry: ½” BSP

Accessories: With or Without Cable Gland

Cable Entry Size: M20, ½” NPT, ¾” ET

Cable Entry Nos: 1 or 2 nos

CERTIFICATES: BIS | CIMFR | PESO

STANDARDS: IS/lEC 60079-0:2017 | IS/lEC 60079-1:2014| IS/lEC 60019-31:2013

How It Works

Construction Features

• Thick metal body (aluminum alloy or stainless steel)
• Threaded or flanged joints with precise tolerances
• Flame paths designed to cool escaping gases
• Certified cable entries (Ex d glands)
• Internal terminal block or temperature transmitter

Working Principle

1. Thermocouple generates a small voltage due to temperature difference.
2. This signal reaches the terminals/transmitter inside the head.
3. If a fault causes: Spark, Short circuit, Overheating
4. Any explosion inside the head: Is contained, Escaping gases lose temperature through flame paths, External flammable gas is not ignited

Where it is Used?

They are used in hazardous areas where flammable gases, vapors, or dust may be present.

Typical Industries

• Oil & Gas (refineries, offshore platforms)
• Petrochemical plants
• Chemical processing units
• Power plants
• Fertilizer plants
• Paint and solvent industries
• Mining and metal processing
• Pharmaceutical plants (solvent areas)

Typical Applications

• Furnace temperature measurement
• Reactor vessels
• Heat exchangers
• Boilers
• Distillation columns
• Storage tanks
• Gas pipelines