TopTechnical DictionaryIK mechanical strength rating

IK mechanical strength rating

The classification of IK mechanical strength is specified in the European Standard EN 62262 and its international counterpart – IEC 62262:2002. It may be applied in determining the IP rating against impacts (vandal proof) in video cameras used in monitoring and other devices. The IK classification allows for specifying the IP rating which is ensured by the housing of a device against external mechanical impacts.

 

The designation of mechanical strength IKxy consists of the letters IK and its level in the 11-degree scale ("00" to "10"). The higher the IK parameter is, the higher mechanical strength is. IK designation determines the resistance potential of, for instance, a video camera and it facilitates the selection of the most suitable one. A high IK value may prevent the necessity of replacing a video camera due to impacts, for instance vandal impacts. In order to find out whether a video camera, which we want to buy, is vandal proof, it is necessary to check the IK classification.

 

The table below presents respective IK levels and corresponding impact resistance.

 

IK level Impact resistance Impact equivalent
00 0 J no protection
01 0,15 J object fall 200 g from a height 7,5 cm
02 0,20 J object fall 200 g from a height 10 cm
03 0,35 J object fall 200 g from a height 17,5 cm
04 0,50 J object fall 200 g from a height 25 cm
05 0,70 J object fall 200 g from a height 35 cm
06 1 J object fall 500 g from a height 20 cm
07 2 J object fall 500 g from a height 40 cm
08 5 J object fall 1700 g from a height 29,5 cm
09 10 J object fall 5000 g from a height 20 cm
10 20 J object fall 5000 g from a height 40 cm

Another important housing property is the type of material. The list below presents the advantages and disadvantages of some popular materials used in manufacturing housings.

 

Polycarbonate (PC) and polycarbonate reinforced with glass fibre (PC + GLASS) 

Advantages Disadvantages
  • excellent mechanical strength
  • plastic available also in a transparent version
  • simple mechanical processing with the use of standard tools
  • high internal protection
  • smooth and attractive finishing
  • wide range of operating temperature
  • self-extingushing plastic
  • good chemical resistance
  • light weight
  • good resistance to UV radiation
  • excellent insulating properties
  • low costs of material used in hostile environments
  • no EMC screening
  • Acrylonitrile butadiene styrene (ABS) 

    Advantages Disadvantages
  • simple mechanical processing with the use of standard tools
  • possibility of colouring by means of pigments
  • light weight
  • good chemical resistance
  • excellent insulating properties
  • insignificantly lower mechanical resistance in relation to polycarbonate
  • insignificantly narrower range of operating temperature
  • insignificantly weaker resistance to UV radiation compared to PC; outdoor application only with protecting shields
  • plastic transparent version unavailable
  • no EMC screening
  • Polyester reinforced with glass fibre (GRP) 

    Advantages Disadvantages
  • excellent resistance to corrosion and chemicals
  • good mechanical strength
  • structure rigidity
  • resistance to atmospheric factors
  • wide range of operating temperature
  • fire resistance
  • good insulating properties
  • material more expensive than PC
  • mechanical processing possible only with special tools
  • no EMC screening
  • higher weight compared to other plastics
  • Aluminium (AL) 

    Advantages Disadvantages
  • good chemical resistance (dust painting)
  • excellent mechanical strength
  • wide range of operating temperature
  • grounding simplicity
  • EMC screening; note: in a respective range as standard housing
  • good resistance to a rapid temperature increase
  • structure rigidity
  • material more expensive than PC
  • higher weight compared to PC and ABS
  • mechanical processing possible only with special tools

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