Waterproof hydrostatic pressure level sensor IP68 is one of Pokcenser’s best-selling products. They are widely used in urban water supply and drainage, petrochemicals, the power industry, and in the pharmaceutical and environmental protection industries. Simply put, they consist of a probe and a certain length of cable. The performance of these cables is largely determined by their sheath material. PVC, PUR, FEP, and PE are common choices, each with its own unique advantages and limitations.

1. PVC (Polyvinyl Chloride)

Features:

·Low cost: Ideal for budget-sensitive projects.

·Chemical resistance: Tolerates acids and alkalis but degrades in oily environments.

·Flame retardancy: High oxygen index enhances fire safety.

Drawbacks:

·Environmental concerns: Contains plasticizers and heavy metals; food-grade variants are recommended.

·Limited temperature range: -20℃~70℃; deforms under high heat.

Applications:

·General industrial environments and low-voltage systems.

2.PUR (Polyurethane)

Features:

·Oil and abrasion resistance: Excellent for oily or high-friction environments.

·Wide temperature range: Operates from -40℃ to 120℃ with flexibility.

·UV and hydrolysis resistance: Long lifespan outdoors or in humid conditions.

Drawbacks:

·Higher cost: ~45% more expensive than PVC.

Applications:

·Drag chains, medical devices, and chemical plants

3.FEP (Fluorinated Ethylene Propylene)

Features:

·High-temperature tolerance: Withstands up to 200℃ continuously.

·Chemical inertness: Resists strong acids, bases, and solvents.

·Low friction: Suitable for dynamic cable designs.

Drawbacks:

·High cost: Expensive raw materials and processing.

·Complex manufacturing: Requires specialized equipment.

Applications:

Semiconductor manufacturing and high-corrosion environments.

4.PE (Polyethylene)

Features:

·Cold resistance: Performs well at -50℃.

·Superior electrical properties: Low dielectric loss for high-frequency signals.

Eco-friendly: Halogen-free and non-toxic.

Drawbacks:

·Low mechanical strength: Requires thicker walls or composites.

·Poor oil resistance: Swells in prolonged oil contact.

Applications:

·Water supply pipelines, communication cables, and outdoor burial

5.Selection Tips

1) Budget focus: PVC with eco-certification.

2) Harsh conditions: PUR (oil/abrasion) or FEP (heat/chemicals).

3) Low temperature or signal integrity: PE is optimal.

4)Balanced performance: PUR excels in versatility for industrial use.

You can choose the most suitable cable material according to your specific needs. Please consult us for more technical details. Pokcenser provides submersible pressure level transmitter for water tank and hydrostatic pressure level sensor for fuel tanks.

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