M.E.M. provides a wide range of cables suitable for process control and signal transmission. In the Industries, related to Power Generation & Distribution, Petrochemical, Fertilizers, Steel Plants, Oil refineries, Aluminium plants and other Engineering Industries, the process instrumentation plays a vital role in quality, productivity, economy and control of the entire plant.

Shielding or Screening is the most important part of Instrumentation Cables which are provided by aluminium - mylar tape with copper drain wire or tinned copper braided. Both the types have got their respective advantages. Shielding of either of the forms or even both the forms is provided in extreme situation depending upon the application. When signal speeds are comparitively low a braid screen is sufficient, but for higher speeds a foiled screen or composite foil and braid screen is more suitable. A further refinement is to use individually screened pairs to minimize the effect of cross talk, thus making possible the transmission of data over long distances. Armouring of Galvanised Steel Wire/Flat Strip / Flexible Braiding is provided to prevent the Cables from mechanical stresses.

Shield is provided to prevent harmful electrostatic interference. There are three basic reasons for providing an electrosatic shield in a cable. The first, and most common, reason concerns the need to keep external electrical disturbances from affecting the signal in the cable. The second reason is to prevent the signal in the cable from being detectable at location other than at the cable ends. The third reason is the combinatin of the first two, i.e., the elimination of unwanted transfer of signals between circuit in the same cable, commonly called cross talk.

Range of Instrumentation Cables

• Conductor
  0.4 mm dia (0.1 26 sqmm) to 2.5 sqmm or higher sizes of electrolytic copper wire Bare / Tinned, Solid /Stranded copper conductors.
• Insulation
  70°C / 85°C PVC, Polyethylene, Halogen free FRLS Polymeric Compounds.
• Elements
  Pairs/Traids/Quads, Color Coded/Number Printed for identification.
• Shielded/Screened
  Aluminium polyester tape screen with copper drain wire or with tinned copper wire braiding. Individually element or overall shielding as specified.
• Armouring
  Galvanized Steel Wire / Strip Armour.
• Sheathing (Inner/Outer)
  70°C / 85°C PVC, FRLS, Halogen Free Polymeric Compounds.
• Instrumentation cables are normally as per BS:5308 (Part-2) or IS:5608.
  

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