When choosing a metal detector, consider the type of detecting you plan to do. Key features include adjustable sensitivity, discrimination settings to filter out unwanted metals and ground balance to handle mineralised soil. Frequency also matters, as lower frequencies are better for larger objects while higher frequencies are more sensitive to small items like gold. Waterproof coils, lightweight design and long battery life can also improve overall performance and comfort during extended detecting sessions.

The depth a metal detector can reach depends on the model, coil size and ground conditions. Most standard detectors can locate coins and small objects at depths of 15 to 30 centimetres, while larger items may be detected deeper. Soil mineralisation, moisture and target size all affect performance. Larger coils generally provide greater depth, while smaller coils improve accuracy in areas with lots of metal debris or closely spaced targets.

Some metal detectors are designed for beach and shallow water use, but it is important to check whether the coil or entire unit is waterproof. Wet sand can contain mineralisation that affects performance, so detectors with ground balance features are ideal for coastal environments. Fully submersible models allow detecting in shallow water, while others are suitable only for dry sand. Choosing the right model ensures reliable results in different outdoor conditions.