The outer material is a key factor when choosing a sensor, since it must be suitable for the application's ambient conditions. This is the only way to ensure reliable operation of machinery and plants. The following materials are used by Pepperl+Fuchs in manufacturing its sensors and the associated connection technology.
Most cylindrical capacitive sensors from Pepperl+Fuchs have nickel-plated brass housing sleeves. Nickel-plated brass sensor housings are cost-effective and offer the mechanical resistance of a metal housing. This makes these housings multipurpose and ideal for many applications.
Typical applications: all applications in which no specific chemical properties or high impermeability are required.
Sensors with stainless steel housing are especially suited to use in aggressive ambient conditions. This type of steel is stainless, meaning that housings of this design boast ideal protection against corrosion. They are therefore suitable for harsh industrial environments. If a low-alloy stainless steel (1.4305, in the "GS" type code) is not sufficient for special applications, Pepperl+Fuchs has sensors in higher-alloy stainless steel housings (1.4404, type code "GH").
Typical applications: applications in which increased protection against corrosion is required, such as outdoor applications. However, stainless steel housings can be used where the sensor comes into contact with aggressive media, or where frequent cleaning cycles with high-pressure cleaners are to be expected.
Polytetrafluoroethylene (PTFE) is known in particular as a nonstick coating in frying pans, but it is also utilized in sensor technology—for example in welding applications. Welding beads on PTFE-coated sensors cannot burn into the plastic parts or otherwise adhere to the sensor, but instead roll off straightaway. This makes these sensors welding-bead resistant.
Typical applications: detection applications in vehicle body building in the vicinity of welding robots.
Semi-crystalline, glass-fiber-reinforced polybutylenterephtalate (PBT) has various properties that make it an attractive option for sensor housing material. PBT is geometrically accurate, abrasion-resistant, heat-resistant, and cold-resistant. PBT housings also provide resistance to hydrocarbons (e.g., trichloroethylene), acids (e.g., 28 % sulphuric acid), sea water, and water heated to +70 °C.
Typical applications: standard applications in industrial environments without special requirements.
Pepperl+Fuchs uses the particularly heat-resistant PPS (polyphenylensulfide) for sensors used in ambient temperatures up to +150 °C. The crystalline material is dimensionally stable up to +200 °C. The electronics are vacuum-encapsulated with casting resin in sensors with PPS housing.
Typical applications: operating environments with high ambient temperatures
Polyamides are materials with high strength, torsional rigidity, and impact strength. Sensor housings made of this material offer resistance to diluted lyes, aliphatic and aromatic hydrocarbons, gasoline, alcohols, esters, ketones, fats, and oils. However, polyamides are susceptible to strong acids.
Typical applications: standard applications in industrial environments without special requirements.
PVC Sheath material: polyvinylchloride (PVC) Core insulation: polyvinylchloride (PVC) | |
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PUR Sheath material: polyurethane (PUR) Core insulation: polypropylene (PP) | |
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Cables in proven PVC quality for standard requirements.
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Typical application: transport and packaging industry
A cable in flexible PUR quality for high cyclical bending stresses.
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Typical applications:conveyor chains, machine tools, plant construction, paint processing, automotive industry. Especially for the North American market
PUR-A cables are an alternative to irradiated polyurethane cables used in the automotive sector. In addition, PUR-U cable can be recycled and can be disposed of easily.
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Typical applications: automotive industry, welding systems, plants in the North American market
PUR cables for the automotive industry.
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Typical application: automotive industry (e.g., Volkswagen)
PUR cable, which is particularly suited to use in robotics.
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Typical application: robotic arms
Durable cable for harsh outdoor ambient conditions.
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Typical applications: mobile equipment, uses involving high ultraviolet radiation exposure, e.g., at sea level or in high mountains
Cable with rail approval.
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Typical applications: rail vehicles, vehicle interiors
High-quality cable for strong thermal requirements.
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Typical applications: automotive industry, welding systems, steel industry
PVC cable for harsh ambient conditions, intended exclusively for use in North America.
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Typical applications: installation in cable ducts and cable racks
Cables for the food & beverage sector.
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Typical application: in the food processing industry