What tools can identify hidden mould or damp?

Professionals use various tools to detect mould and damp, including:

• Moisture meters – Measure water content in walls, floors, and ceilings.
• Thermal imaging cameras – Identify cold spots that may indicate hidden damp.
• Hygrometers – Measure indoor humidity levels.
• Borescopes – Small cameras that inspect hidden areas behind walls or under floors.
• Air sampling devices – Test airborne mould spore levels.