Ohm 109 108 106 105 107 233 Electrostatic Controlling unwelcome electrostatic charge is becoming an increasingly important role in industry, as more and more employees come into contact with processes, materials or objects which are sensitive to electro static charge. It is often necessary to use safety footwear as part of a system to conduct electrostatic charge in such workplaces. Independent of various measuring methods, volume resistance between 100 kiloohms (1.0×105 ohms) and 100 megaohms (1 x 108 ohms) is required to fulfil the various relevant standards (e.g. EN ISO 20345, EN 61340). All ESD-certified products in this catalogue feature the ESD symbol. These products are also suitable in accordance with the specification for conductive footwear in the German Technical Rules for Hazardous Substances (TRGS) 727 “Avoiding risks of ignition resulting from electrostatic charges.” 1×105 Ω ≤ R ≤ 1×109 Ω (100 kiloohms to 1 gigaohm) Electrostatic discharge (ESD-)footwear in accordance with EN 61340-4-3 and EN 61340-5-1 1×10⁵ Ω ≤ R ≤ 1×108 Ω (100 kiloohms to 100 megohms) Low resistance (conductive) Volume resistance in accordance High resistance (insulating) Antistatic acc. EN ISO 20345 / EN ISO 20347 R > 1×10⁹ Ω (1 gigaohms) R < 1×10⁵ Ω (100 kiloohms) R = electrical resistance Safety Footwear Standards · Labels · ESD * Penetration resistance Warning – Please note that the penetration resistance of this footwear has been measured in the laboratory using a truncated nail of diameter 4.5 mm and a force of 1100 N. Higher forces or nails of smaller diameter will increase the risk of penetration occurring. In such circumstances alternative preventative measures should be considered. Two generic types of penetration resistant insert are currently available in PPE footwear. These are metal types and those from non-metal materials. Both types meet the minimum requirements for penetration resistance of the standard marked on this footwear but each has different additional advantages or disadvantages including the following: Metal: Is less affected by the shape of the sharp object/hazard (i.e. diameter, geometry, sharpness) but due to shoemaking limitations does not cover the entire lower area of the shoe. Non-metal: May be lighter, more flexible and provide greater coverage area when compared with metal but the penetration resistance may vary more depending on the shape of the sharp object/hazard (i.e. diameter, geometry, sharpness). For more information about the type of penetration resistant insert provided in your footwear please contact the manufacturer or supplier detailed on these instructions.
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