Metal and water
A general metal detector is evaluated against target size, ground conditions, handling and the included coil. A waterproof model adds questions about protection and use in wet, often mineral-rich conditions. Water resistance alone does not establish how well a particular configuration performs on a saltwater beach.
Gold and ground scanning
Gold prospecting depends strongly on target size, mineralisation, coil and operating routine. A ground scanner produces data that require a capture plan and interpretation; it should not be treated as a hand detector with a larger depth number. Follow the Spanish source category and compare models within the same method before asking for a complete kit.
A source-page checklist
For each candidate, record the Spanish URL, model name, variant, included coil or sensor, software, battery, training and date of the information. Mark absent fields as unknown. Photos are useful for recognising a product family, but they cannot confirm the exact kit delivered today. Ask for a written quote that resolves the unknown fields and compares only devices intended for the same search problem. If an image or table appears inconsistent, send its URL rather than relying on a copied fragment.