Key Takeaway
Choosing the right diving magnet comes down to matching pull force to your operational needs. For light inspection, 115–140 kg models work well. For standard commercial diving tasks, 160–280 kg magnets offer the best balance of power and portability. For heavy-duty offshore anchoring, 320–500 kg models deliver the sustained holding force that demanding subsea operations require.
Why Pull Force Matters More Than Size
The single most important specification when selecting a diver magnet is its rated pull force — measured in kilograms on a smooth 10 mm polished steel plate at 20°C under 100% surface contact. This number tells you the maximum static holding power under ideal conditions.
However, real-world subsea conditions are never ideal. Factors like marine growth, paint, rust, curved surfaces, current, and temperature all reduce effective holding power.
Choosing the Right Capacity
Choose a magnet whose rated pull force is at least 2–3× the holding load you need — more for dynamic, angled or vibrating loads. Rated pull is measured under ideal conditions; actual holding force depends on surface condition, contact area, coating and paint, and the direction of the load. Diving magnets are positioning and holding tools, not lifting equipment.
Magnet Tiers by Application
Light Duty: 115–140 kg Pull Force
The Diver Magnet - 115 and Diver Magnet - 140 are ideal entry-level magnets for:
- Hull surveys and visual inspections
- Light maintenance work near steel structures
- Situations where compact size and low weight are priorities
These models provide reliable holding power while remaining easy to attach and detach with one hand.
Standard Commercial: 160–280 kg Pull Force
The mid-range models — Diver Magnet - 160, Diver Magnet - 200, Diver Magnet - 230, Diver Magnet - 250, and Diver Magnet - 280 — are the workhorses of the commercial diving industry. They cover:
- Offshore pipeline inspection and maintenance
- Ship hull cleaning and underwater welding
- Subsea construction support
- UWILD (Underwater In-Lieu of Drydocking) surveys
The Diver Magnet - 200 and Diver Magnet - 250 are particularly popular because they strike an excellent balance between holding power and operational flexibility.
Heavy Duty: 320–500 kg Pull Force
For the most demanding subsea operations, the Diver Magnet - 320, Diver Magnet - 400, and Diver Magnet - 500 deliver exceptional holding power. These are designed for:
- Holding position in strong currents
- Extended work periods on large steel structures
- Tool staging and equipment positioning
What Makes a Diver Magnet Different from a Standard Magnet?
Standard pot magnets and hook magnets are not designed for underwater use. Our Diver Magnets are purpose-built for subsea environments with:
- Epoxy-HDPE coating — prevents saltwater corrosion and protects the neodymium core
- 316 stainless steel eye nut and handle — marine-grade hardware that won't corrode
- Reinforced housing — plated A3 steel pot designed to withstand impacts and rough handling
- Ergonomic design — handle allows controlled one-handed attachment and detachment underwater
Practical Selection Checklist
Before choosing your magnet, consider these factors:
- What surface will you attach to? Smooth, clean steel gives full rated pull force. Painted, rusty, or curved surfaces reduce it significantly.
- What current conditions do you work in? Stronger currents mean you need more holding power.
- How long will you be attached? Extended operations benefit from higher pull force for safety margins.
- What tool or equipment load will you hold? Heavier tool loads and equipment need stronger magnets.
- Do you need one-handed operation? All our models feature a handle for controlled attachment, but larger magnets require more effort to detach.
Pair Your Magnet with the Right Accessories
For optimal safety, pair your diving magnet with a Diver Magnet Lanyard. This prevents accidental magnet loss and keeps it secured to your harness at all times.
Still unsure which model is right for your operation? Visit our magnet comparison page to see all models side by side, or browse our complete Diver Magnet range.
