There are a number of different options on the various componets used to make up a thermocouple assembly.

For assistance in choosing the correct option please call Sales on 01256 884901.

1. Termination Heads

Ceramic terminal blocks are fitted as standard to all heads

Standard Single Head: General purpose die cast aluminium alloy head with hinged lid.

Standard Duplex Head: Specification as standard single head for duplex thermometers.

Weatherproof Single Head: Cast aluminium alloy head for outside applications and where liquid or moisture ingress is a problem. Incorporating threaded lid, seal, ¾" BSP process thread and 20mm ISO cable entry. The weatherproof single head is also available in cast iron.

Weatherproof Duplex Head: Specification as weatherproof single head for duplex thermocouples.

2. Process Connections

Fixed Welded Process Adaptors: Available in Carbon Steel and Stainless Steel with parallel or tapered thread.

Adjustable Process Adaptors: Available in Carbon Steel and Stainless Steel with parallel or tapered thread.

Flanges - Fixed Welded: Available in Carbon Steel and Stainless Steel to customer specification.

Flanges - Adjustable Standard Sizes
3"(76.20mm) Cast Iron
4"(101.60mm) Cast Iron
5" (127.00mm) Cats Iron

3. Metal Protection Sheaths

253 Cr Ni REM
1100°C Temperature limit
¾" NB x SCH 40 (26.67 x 20.93)
½" NB x SCH 40 (21.34 x 15.80)
5/8" OD x ½"ID (15.87 x 12.70)

54 Cr Fe
1150°C Temperature limit
¾" NB x SCH 40 (26.67 x 20.93)
½" NB x SCH 40 (21.34 x 15.80)
½" OD x ¼" ID (12.70 x 6.35)

600Ni Cr Fe
1150°C Temperature limit
1" OD x ¾" ID (25.40 x 19.05)
¾" OD x ½"ID (19.05 x 12.70)
5/8" OD x ½"ID (15.87 x 12.70)
½" OD x 3/8" ID (12.70 x 9.52)

601Ni Cr Fe Al
1250°C Temperature limit
1" OD x ¾" ID (25.40 x 19.05)

35Ni Cr Fe Si
1300°C Temperature limit
1" OD x ¾" ID (25.40 x 19.05)
5/8" OD x ½" ID (15.87 x 12.70)

Inner impervious refractory sheath fitted on all noble metal thermocouples. Temperature limits subject to operational environment and thermocouple element type.

4. Thermocouple Element

Conductors conform to BS EN 60584-2: 1993 Class 1 & 2 tolerance

Conductors conform to BS EN 60584-2: 1993 Class 1 tolerance
*Conductors conform to BS EN 60584-2: 1993 Class 2 tolerance

Also available: Other thermocouple Types and Insulated Elements

5. Refactory Sockets

Sheathed T/C Only
Available in Mild Steel and Heat Resisting Steel.

1. 2 ¾" Diameter (57.15mm)
2. 1 3/8" Diameter (34.92mm)
3. 1 5/16" Diameter (1" Nominal Bore) (33.33mm)
4. 1 ¼" Diameter (31.75mm)
5. 1 1/16" Diameter (3/4" Nominal Bore) (26.98mm)
6. ¾" Diameter (19.05mm)
7. 5/8" Diameter (15.87mm)
8. ½" Diameter (12.70mm)

6. Refractory Protection Sheaths

Aluminous Porcelain*
Temperature limit: 1400°C

Recrystalised Alumina
Temperature limit: 1800°C

Silicon Carbide
Temperature limit: 1450°C

Temperature limit subjected to operational environment and thermocouple element type.

* Not recommended above 1200°C for noble metal thermocouples.