When it comes to selecting electrical connections for sensors, the correct cable jacket type is crucial to ensure optimal performance, safety, and longevity. The cable jacket material should be carefully chosen based on factors such as environmental conditions, the type of liquids involved, budget, and specific application requirements. In this article, we will dive into the properties of four common cable types—PVC, PUR, FEP, and PE—to help you make an informed decision.
PE (Polyethylene) Cables
PE cables are designed for applications that require flexibility, durability, and resistance to environmental stresses. With a wide operating temperature range of -45 to 80°C, they are suitable for various industrial applications. PE cables are particularly known for their resistance to pressure, wear, and corrosion, particularly in environments exposed to chemicals such as acids and alkalis.
In addition to their chemical resistance, PE cables have excellent anti-aging properties and flame retardancy, making them ideal for water measurement and similar applications where long-term reliability is essential. Their ruggedness and resistance to environmental factors ensure they continue to perform effectively over time.
PUR (Polyurethane) Cables
PUR cables are designed to handle tougher environmental conditions than PVC cables. With a temperature range of -45 to 80°C, PUR cables are ideal for applications requiring enhanced durability, flexibility, and chemical resistance. They are known for their abrasion resistance and ability to maintain flexibility even at low temperatures, ensuring reliable performance in harsh conditions.
Another significant benefit of PUR cables is their halogen-free composition and self-extinguishing properties, which make them a safer choice in environments prone to fire hazards. PUR cables are also highly resistant to oils, oxidation, and ozone, making them the go-to option for applications exposed to aggressive chemicals. Typical uses include measuring seawater and diesel, where reliability and longevity in harsh environments are crucial.
FEP (Fluorinated Ethylene Propylene) Cables
For the most demanding and aggressive environments, FEP cables provide unparalleled chemical resistance. With a temperature range of -45 to 80°C, these cables are constructed with a blend of PUR and PTFE (Polytetrafluoroethylene), providing exceptional resistance to a wide range of chemicals.
FEP cables excel in applications where compatibility with corrosive liquids and extreme conditions is necessary. Their high resistance to acids, alkalis, and high temperatures makes them the preferred choice for industries dealing with harsh substances like acids, solvents, and strong bases. While they come at a higher price than PVC or PUR, the long-term durability and reliability of FEP cables can result in lower maintenance costs over time, making them a worthwhile investment in the right contexts.
PVC (Polyvinyl Chloride) Cables
PVC cables are one of the most commonly used types due to their affordability and versatility. With an operating temperature range of 0 to 105°C, PVC cables offer a reliable solution for many industrial applications. Their flexibility is a major advantage, allowing for easy installation in various settings, while their chemical and abrasion resistance make them a durable choice when handling diverse liquids.
While PVC cables are moisture- and saltwater-resistant, they are not halogen-free, which could be a drawback in environments where fire safety is a critical concern. Therefore, PVC is best suited for non-submersible measurements and less critical installations where budget is a key consideration. The price-to-performance ratio is one of the strongest selling points of PVC cables, making them an ideal choice for cost-conscious projects.
Conclusion
By understanding the distinct properties of PVC, PUR, FEP, and PE cables, you can make a well-informed choice that aligns with the unique needs of your application. Whether you are looking for a cost-effective solution for a less demanding application or a high-performance cable for harsh, chemical-laden environments, selecting the appropriate cable type is critical to ensuring the longevity and efficiency of your sensors.
For further technical guidance on choosing the best cable jacket materials for your specific needs, feel free to reach out to Holykell for expert advice.