Diver Magnet - 140
The Diver Magnet – 140 is a compact subsea magnet designed for light-to-medium commercial diving tasks. It is ideal for work such as cleaning marine growth from welds prior to inspections or hull surveys on vessels like FPSOs, FSOs, and offshore structures such as SBMs, where equipment is attached to the diver and frequent repositioning is required. Built with a high-strength neodymium pot magnet, stainless steel eye nut, and stainless steel handle, it provides dependable holding power, secure tool attachment, and controlled detachment in demanding underwater environments.
Pull Force: 140 kg · Magnetic face Ø: 60 mm · Grade: N48 · Coating: Epoxy-HDPE · Depth: proven in service to 150 m · Country of origin: South Africa
The Diver Magnet - 140 is a compact, lightweight neodymium pot magnet rated at 140 kg pull force — ideal for light-duty tool holding, inspection tasks, and confined-space subsea work where portability matters. Manufactured by Diving Magnets (Pty) Ltd in South Africa with Epoxy-HDPE coating for corrosion resistance and 316 stainless steel hardware, this diver magnet is trusted by commercial diving professionals worldwide.
What is the Diver Magnet - 140 used for?
- Holding small hand tools (scrapers, wire brushes, measuring tapes) on steel structures underwater
- Hull inspection and marine survey work in confined spaces
- Light-duty subsea positioning for cameras and sensors
- Diver staging point for personal equipment during short tasks
- Cathodic protection survey work on offshore platforms
Features & Benefits
- 140 kg neodymium pot magnet — compact and lightweight for confined-space work
- Magnet sealed in epoxy and HDPE for continuous saltwater use
- 316 stainless steel eye nut and handle hardware — highly corrosion-resistant in marine environments
- Single-hand controlled detachment for safe underwater tool management
- Safety lanyard attachment point for tethered operation
What surfaces does the Diver Magnet - 140 work on?
Works best on
- Mild steel and carbon steel (best performance — flat, clean surfaces)
- Cast iron structures and components
- Structural steel beams, columns, and plate
- Steel pipelines and risers
- Ship hulls and marine vessel steel
Reduces performance
- Rusted or corroded surfaces — rust and scale create an air gap that reduces pull force
- Painted or coated surfaces — coating thickness creates an air gap
- Curved surfaces — reduced contact area lowers effective pull
- Thin metal (under 5 mm) — insufficient material for full flux path
Will not work on
- Aluminium, brass, copper, and bronze (non-ferrous metals)
- Most austenitic stainless steels (304, 316) — little or no attraction, slightly magnetic only where cold-worked or welded
- Concrete, wood, plastic, fibreglass, and composites
- Titanium and non-magnetic alloys
Safety Guidelines
- Always wear protective gloves when handling magnets rated above 100 kg pull force — pinch injuries are the most common hazard
- Keep magnets away from dive computers, compasses, and electronic instruments — strong magnetic fields can cause permanent damage
- Never allow two magnets to snap together uncontrolled — the collision force can shatter the magnet and cause flying debris
- Use a safety lanyard to secure the magnet to your harness — prevents loss in current or during detachment
- Attach at a 45° angle and rotate flat — never approach a steel surface head-on with a strong magnet
- Brief your dive team on magnet location — unexpected strong pull near steel structures can trap equipment or limbs
Care & Maintenance
- Rinse thoroughly with fresh water after every saltwater use — salt crystals accelerate corrosion if left on the coating
- Dry completely before storage — moisture trapped against the magnet surface causes coating breakdown over time
- Inspect the Epoxy-HDPE coating regularly — any chips or cracks expose the neodymium core to corrosion
- Remove iron filings and metal particles after each use with a wire brush or cloth — accumulated debris reduces pull force
- Store in a cool, dry environment away from electronic equipment — temperatures above 80°C permanently reduce magnetic strength
- Apply a thin layer of corrosion inhibitor (light oil or silicone spray) for long-term storage
Best for light-duty and inspection work
- Commercial divers doing hull inspections, cathodic protection surveys, or confined-space work
- Dive teams that need a compact, portable magnet for small tools
- Operators who work on lighter structures where 140 kg pull force is sufficient
- Divers who prioritise low weight and easy handling over maximum holding power
- A good entry-level choice for divers new to magnetic tool holding
Frequently Asked Questions — Diver Magnet - 140
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