Span Marker

Span Marker also known as Daymarking Warning Spheres or  Aerial Marker Balls, are installed on overhead power lines, ropeways, and river-crossing cables to make them clearly visible from a distance. Their primary purpose is to provide a visual cue for low-flying aircraft, helicopters, and drones, reducing the risk of accidental collisions. At Instapower, we supply high-quality marker balls that meet ICAO (International Civil Aviation Organization) guidelines and ensure reliable performance.
 

Purpose

Enhance the visibility of overhead cables so that pilots can easily spot them.

Ensure the safety of both transmission lines and low-flying aircraft.

Reduce the risk of accidents in critical areas such as river crossings, hilly terrains, and transmission corridors.
 

Key Features

Durable Construction: Manufactured from high-strength fiberglass-reinforced polyester resin or UV-stabilized polyethylene, designed to withstand long-term outdoor exposure.

Easy Installation: Two-piece hemispherical design that securely clamps to cables using high-grade aluminum alloy hardware.

High-Visibility Colors: Available in orange, white, or red combinations for maximum daytime visibility.

Weather & UV Resistance: Protected with a polyurethane coating that resists fading and environmental wear, ensuring a long service life.

Instapower Span Marker and  Daymarking Warning Spheres are trusted by power utilities, airports, and infrastructure projects as a cost-effective and reliable solution for improving aerial navigation safety.