Industrial thermocouples for non-ferrous metals

"CTAL" range

Such thermocouples are suited for immersion in the melting materials. They are therefore protected by a cast iron, silicon carbide or Sialon protecting tube. The choice of the material depends on the requested performances.

Each one of these protecting tube materials holds advantages and drawbacks as far as mechanical or thermal resistance or longevity are concerned. Environmental and operating conditions are key elements when it comes to choosing the right material. Protecting tubes offering good mechanical resistance are for instance recommended in high capacity melting ovens whereas protecting tubes with high resistance to corrosion are best suited for temperature

	_{cast iron}	_{silicon carbide}	_sialon
_{mechanical resistance}	_⁺⁺⁺	_⁺	_⁺⁺
_{resistance to thermal shocks}	_⁺⁺	_⁺	_⁺⁺⁺
_{résistance to wear and tear}	_⁺	_⁺⁺⁺	_⁺⁺⁺
_wettability	_⁺	_⁺⁺	_⁺⁺⁺
_{thermal conductivity}	_⁺⁺⁺	_⁺⁺	_⁺⁺⁺
_cost	_⁺⁺⁺	_⁺⁺	_⁺

Type K, N, S thermocouples for temperature measuring up to +1200°C

Accuracy

Accuracy depends on :

Thermocouple wire tolerances as per NF EN 60584-2 standard
Tolerances of the sensors as per UTE 46201 standard
Reduced tolerances are available on request

Mechanical data

Thermocouples may be mineral sheathed with magnesium oxide insulation for a stronger protection against corrosion. They may also be protected under ceramic insulating beads.

Applicable standards

IEC 60584
UTE 46201
Additional applicable standards are taken into consideration upon customer request.

- "L1" length on customer request

- "L" length and "D" diameter depending on protecting tube material

sensing element :

Standard sensing elements:

simplex or duplex thermocouple
type: K, J, T, N or S

Specific sensing elements:

simplex or duplex thermocouple
type: E, B, R or C

insulation :

- Standard or high purity magnesium oxide (MgO)

- Ceramic insulating beads

hot junction :

ungrounded

protecting tube :

All protecting tubes may be supplied as spare parts.

_^material	_^diameter	_^length
_{enamelled cast iron}	_{45 mm}	_{300 to 1200 mm}
_{graphite silicon carbide}	_{50 mm 52 mm 54 mm 55 mm 65 mm}	_{300 to 1067 mm 305 to 915 mm 750 to 1060 mm 850 mm 255 mm}
_{nitrided silicon carbide}	_{25 mm}	_{460 to 1200 mm}
_{sialon (ceramics)}	_{22 mm}	_{460 to 800 mm}

other diameters or lengths on request

Available fittings :

female:female 2" - 3/4"
1/2" GCY, 3/4" GCY, 2" GCO fitting
1/2" GCY female/female nipple

arm :

Electrogalvanized soft steel

cast iron fitting between arm and protecting tube

connecting head :

- Aluminium head with screwed or lever lid

- IP54 to IP67 protection index

- A connection via cable or connector may replace the connecting head

Recommendations

Cast iron protecting tubes must be dressed when not enamelled
Pre-heating is highly recommended to avoid thermal schocks
These sensors should be handled with care to avoid shocks, especially when cleaning slags
Other components than the protecting tube should stay in contact with the molten material

International colour code of compensating cables:

_^symbol	_⁺	_^-	_^Gaine
_^JC	_^black	_^white	_^black
_^KC	_^green	_^white	_^green
_^TC	_^brown	_^white	_^brown
_^NC	_^pink	_^white	_^pink
_{^{SC / RC}}	_^orange	_^white	_^orange
_^BC	_^grey	_^white	_^grey

IEC 584-3 standard

Industrial thermocouples for non-ferrous metals "CTAL" range

Industrial thermocouples for non-ferrous metals

"CTAL" range