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IMI Scott manufactures electrical resistance wire, thermocouple wire and cable, and associated products.
Based in the United Kingdom, IMI Scott is a major supplier of quality products which are manufactured to British and International Standards.
The business operates from its industrial site at Wythenshawe, Manchester in central Great Britain and is easily reached by road, rail and air.
Continuous research and development into new materials, products and manufacturing plant and methods ensures that the latest product developments are speedily made available to our customers worldwide.
IMI Scott is an operating subsidiary of IMI plc, a leading UK industrial group with major plants operating in Europe, North America, South America and Autralasia.
Please enjoy browsing our web site to discover the range of our products and their technical applications.
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IMI Scott, established in 1923, is a leading UK manufacturer and supplier of electrical resistance wire, thermocouple wire and cable together with a range of associated products.
Products are manufactured to British and International Standards where relevant. Quality is assured by strict control under our Quality System which meets the requirements of BS EN ISO 9002:1994 and for which the company has maintained BSI approval as a Registered Firm since 1989.
IMI Scott's experienced workforce is highly motivated by technology and quality performance. Contiual research and development into new materials and processes ensures that the latest benefits are made available to all our customers.
Technical and application information about the IMI Scott standard product range can be located by clicking on the links in the top menu bar.
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Wire is manufactured in a large range of alloys, with finished diameters from 3.25mm down to 0.06mm.
Diamond dies are used to produce all sizes below 0.7mm, in order to give the highest quality of finish.
All resistance wire conforms to BS 115 - "Specification for metallic resistance materials for electrical purposes".
For diameters less than 0.32mm, material can also be supplied to BS 1117 - "Specification for bare fine resistance wire for precision electrical equipment".
Special tolerances can be supplied upon request.
Wire is normally supplied on DIN reels, with the alternative of drum packs or coils for larger sizes.
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Resistance tape (or ribbon) can be manufactured from the whole range of alloy wires. It has the advantage of offering a greater surface area in a preferred direction which can be beneficial where non-universal heating is required. Example: heating elements in electric toasters.
|
Material |
Nominal Resistivity Microhm.cm |
Maximum Operating Temp °C |
Density g/cm2 |
Nominal Temp Coeffic. of Resistance / °C |
| NICKEL CHROMIUM ALLOYS | ||||
|
Cromaloy 5
80/20 NiCr |
109 |
1250 |
8.3 |
0.0001 |
|
Cromaloy 6 80/16 NiCr |
111 |
1200 |
8.2 |
0.00016 |
|
Cromaloy 3 37/18 NiCr |
104 |
1050 |
7.9 |
0.00024 |
| IRON CHROMIUM ALUMINIUM ALLOYS | ||||
|
Cromaloy 0 |
144 |
1350 |
7.1 |
0.00004 |
|
Cromaloy A 5/22/bal Al/Cr/Fe |
135 |
1280 |
7.25 |
0.00015 |
| COPPER NICKEL ALLOYS | ||||
|
98/2 Cu/Ni |
5 |
300 |
8.9 |
0.0013 |
|
94/6 Cu/Ni |
10 |
300 |
8.9 |
0.0007 |
|
90/10 Cu/Ni |
15 |
400 |
8.9 |
0.0004 |
|
85/15 Cu/Ni |
21 |
450 |
8.9 |
0.00035 |
|
80/20 Cu/Ni |
30 |
500 |
8.9 |
0.00024 |
|
Constantan |
49 |
600 |
8.9 |
0.00004 |
|
KUTHERM ALLOYS |
||||
| Kutherm 3 |
3 |
150 |
8.9 |
0.0022 |
| Kutherm 10 |
10.2 |
250 |
8.85 |
0.00079 |
| OTHER ALLOYS | ||||
|
Nickel |
9 |
600 |
8.9 |
0.005 |
| 2% Manganese nickel |
10.9 |
650 |
8.81 |
0.004 |
| Pure copper |
1.7 |
300 |
8.89 |
0.00393 |
| Stainless steel (304L) |
70 |
300 |
7.93 |
0.001 |
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Pure nickel has the ability to with stand relatively high temperatures without deterioration.. Maximum operating temperature is approx. 600 °C.
Common uses include:-
Typical applications include:-
Nickel wire is available in single strand or multi-strand construction. It is supplied from stock either bare, or insulated.
All diameters, from 3.25mm down to 0.06mm can be supplied on standard DIN reels or in drum packs where appropriate.
The following standard multi-strand wires are held in stock (where 23 x 0.19 refers to 23 strands of 0.19 mm diameter wire).
Alternative constructions are available.
|
Strands |
Diameter |
Nominal area |
|
7 |
0.19 mm |
0.2 mm2 |
|
14 |
0.19 mm |
0.4 mm2 |
|
16 |
0.19 mm |
0.5 mm2 |
|
23 |
0.19 mm |
0.7 mm2 |
|
40 |
0.19 mm |
1.2 mm2 |
|
30 |
0.25 mm |
1.5 mm2 |
|
70 |
0.19 mm |
2.0 mm2 |
|
50 |
0.25 mm |
2.5 mm2 |
|
38 |
0.30 mm |
2.7 mm2 |
|
44 |
0.32 mm |
3.4 mm2 |
|
56 |
0.30 mm |
4.0 mm2 |
|
63 |
0.32 mm |
4.9 mm2 |
|
70 |
0.32 mm |
5.5 mm2 |
|
84 |
0.32 mm |
6.5 mm2 |
This is applied in a multi-stage process. Initially the conductor is double glass lapped and varnished, then overall glass fibre braided and double silicone varnished in order to protect the fibre filaments and improve the insulation properties.
Standard glass fibre will withstand temperatures of up to 350 degrees centigrade, whilst special high temperature glass fibre is suitable for use in temperatures of up to 750 degrees centigrade.
All the multi-strand conductors listed are available from stock with standard glass fibre insulation.
|
Strands |
Diameter mm |
Nominal area mm |
Max. current rating Amps |
Equivalent power at 230 V KW |
|
7 |
0.32 |
0.5 |
6 |
1.4 |
|
23 |
0.19 |
0.7 |
7 |
1.6 |
|
10 |
0.32 |
0.8 |
8 |
1.8 |
|
32 |
0.18 |
0.8 |
8 |
1.8 |
|
32 |
0.20 |
1.0 |
9 |
2.1 |
|
15 |
0.32 |
1.2 |
11 |
2.5 |
|
40 |
0.19 |
1.2 |
11 |
2.5 |
|
30 |
0.25 |
1.5 |
16 |
3.7 |
|
70 |
0.19 |
2.0 |
19 |
4.4 |
|
50 |
0.25 |
2.5 |
22 |
5.1 |
|
38 |
0.30 |
2.7 |
23 |
5.3 |
|
44 |
0.32 |
3.4 |
27 |
6.2 |
|
63 |
0.32 |
4.9 |
30 |
6.9 |
|
70 |
0.32 |
5.5 |
32 |
7.4 |
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Flexible Heating Elements are used for low temperature heating applications, and consist of fine resistance wire wrapped around a core of glass fibre.
Wires are selected from our range of resistance alloys according to power rating, resistance and environmetal conditions
A full design consultancy service is provided in order to achieve optimum performance.
Finished cable resistances generally fall within the range 1 to 10,000 ohms per metre, with typical power ratings of between 5 and 150 watts per metre.
Heater cords can be insulated with PVC, PTFE, silicone rubber or glass fibre to provide both mechanical protection and electrical insulation for the wire element.
Bare Heater Cord and Insulated Cable is supplied in continuous lengths from which individual elements can be manufactured and terminated with connector leads and crimped connectors.
Typical applications for flexible elements include under-soil heating,
electric blankets and anti-condensation heaters.
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Thermocouples provide an economic and accurate means of temperature measurement. They can be extremely robust, have rapid response times and be used over a wide temperature range. Applications are varied across the spectrum of industry from hand-held temperature measuring instruments to heavy chemical plant and refinery applications.
Thermocouple wires are manufactured to the appropriate part of BS EN 60584 - IEC 584.
Wire is also available to ANSI MC96. 1:1982.
Full calibration and EMF testing is performed upon all thermocouple wire and Certificates of Conformity will be supplied upon request.
Details of the thermocouple types available are given in the accompanying table. (Graphical web site)
Sizes
Wires are manufactured in sizes from 3.25mm down to 0.06mm. Bunched and stranded wire is also available.
Stock sizes
|
Type K |
Type N |
JX |
TX |
KCB |
|||
|
Nicro |
Nial |
Nicrosil |
Nisil |
Constantin |
|||
|
Thermocouple wires |
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|
0.20mm |
yes |
yes |
|||||
|
0.30mm |
yes |
yes |
|||||
|
0.50mm |
yes |
yes |
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|
0.71mm |
yes |
yes |
|||||
|
1.00mm |
yes |
yes |
|||||
|
1.63mm |
yes |
yes |
|||||
|
2.00mm |
yes |
yes |
|||||
|
3.25mm |
yes |
yes |
yes |
yes |
|||
|
Extension and compensating wire |
|||||||
|
16/0.20mm |
yes |
yes |
yes |
yes |
yes |
||
|
24/0.20mm |
yes |
yes |
yes |
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Packaging
Wire of diameter 0.9mm of greater is supplied in coils. Smaller sizes are supplied on DIN Reels.
Glass fibre insulation
All sizes of wire can be supplied insulated with glass fibre.
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Cable is required to make the connection between the thermocouple and the measuring instrument. We can supply either extension or compensating type. Extension cables uses the same alloys as the thermocouple. Compensating cable uses different alloys which have a matched EMF output over the appropriate temperature range.
Cable selections should be made after consideration of the temperature, moisture, chemical and abrasive conditions to which it will be subjected in use.
Conductors are single or multi-strand thermocouple wire calibrated to BS 4937 Part 30:1993, IEC 584 Part 3.
Standard construction for all cables consists of: insulated conductors, laid side by side (twin flat), sheathed overall.
Twin twisted and other constructions are also available.
Overbraiding
All cables are available with the following overbraid:
Tinned copper - for electrical screening/shielding
Stainless steel - for abrasive resistance
Copper nickel - for corrosion resistant electrical screening/shielding
Packaging
Cable is supplied as standard on 100m, 250m, 500m or 1000m reels. Other lengths are available in response to customer request.
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IMI Scott's extensible leads provide a convenient, tidy and safe means of connecting a temperature sensor to a measuring instrument.
We offer extensible leads in High Temperature PVC or Polyurethane sheathed round section cable, which is supplied colour coded according to BS 1843 (withdrawn) or BS 4937 Part 30:1993.
Other international colour codes - or special colours - are available for manufacture to special order.
The conductors are calibrated according to BS4937 Part 30. Each conductor consists of 10 strands of 0.12mm wire with all standard thermocouple types being available.
Each lead is supplied with standard unstripped tails of 100mm. Or alternatively, a miniature connector can be injection moulded onto the lead. (See photograph).
Leads are specified according to their fully stretched length. For normal use the recommended stretch is 0.5 metre less than the maximum.
Alternative conductor combinations, tail lengths and stripped ends can be supplied on request.
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IMI Scott manufactures ignition coils and transformers to suit a range of applications. All design is carried out in house, and by using the latest technology and machinery - combined with strict quality control procedures - the company offers products to the highest possible standards.
We offer a range of spark ignition coils to suit a wide profile of products. Many of these have British Gas approval for use in automatic gas ignition systems.
They are initially designed for operation at 240 volts ac. However our spark ignition coils are capable of operating over a range of alternative voltages.
Coils are fully vacuum encapsulated in an epoxy resin and therefore will not be affected by adverse climatic environments under normal operating conditions.
Coils can also be supplied without encapsulation.
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IMI Scott welcomes your enquiries regarding technical aspects, design criteria, packaging, pricing and delivery.
Please contact us by email, telephone, fax or letter.
When emailing us please include full information about your requirement. your organisation and the products you supply or manufacture.
Please also include your operating location and full contact details.
Thank you for browsing our web site.
| Email: | sales@imiscott.co.uk |
| Telephone: | +44 (0) 161 998 5533 |
| Fax: | +44 (0) 161 946 0538 |
| Sales manager: | Mr Lee Plested |
| Postal address: | IMI Scott Limited Dallimore Road Roundthorn Industrial Estate Wythenshawe, Manchester M23 9WJ, England |
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