Foil Electroscope A compact, allplastic enclosed electroscope designed for testing electrostatic charge and demonstrating magnetic behavior. This sensitivity instrument detects whether an object is charged and whether the charge is positive or negative, tests insulation performance, and demonstrates induction charging. It also serves as a visual aid to simulate magnetic molecular structure and to illustrate magnetization and demagnetization. Key benefits Clear, visual detection of electrostatic charge and polarity, making it easy to confirm whether an object is charged. Reliable insulation testing to assess whether a surface or object holds charge. sensitivity and stable performance that is not affected by changes in climate, ensuring repeatable classroom and laboratory results. Enclosed allplastic construction provides good insulation and a safe, dustresistant demonstration environment. Dualpurpose use for both electrostatics experiments and magnetic structure demonstrations, increasing teaching and experiment flexibility. Main features Functionality: Detects charge presence and polarity, tests insulation, demonstrates induction charging, and simulates magnetization and demagnetization phenomena. Construction: Allplastic enclosed design that imitates Japan style, offering improved insulation and protection for the foil elements. Performance: sensitivity to small charges and stable operation across a range of environmental conditions. Usability: Simple method of operation that is suitable for classroom demonstrations and lab exercises. Basic operation To check whether an object is charged, touch the of the electroscope to the object being tested. If the metal foil inside the electroscope opens, the object is charged. If the metal foil does not open, the object is not charged. Practical applications Classroom physics demonstrations: Show electrostatic attraction and repulsion, explain charge transfer, and illustrate positive and negative polarity with a clear, visible response. Laboratory and workshop testing: Verify insulation quality of materials and components, and demonstrate induction charging in controlled experiments. Magnetism demonstrations: Simulate magnetic molecular structure and demonstrate magnetization and demagnetization for lessons on magnetic materials. Suitable use environments Educational settings such as middle school, school, and introductory college physics labs. Teaching laboratories and demonstration rooms where a durable, enclosed electroscope is required. Basic experimental setups that require a sensitive, climatestable instrument for electrostatic and magnetic demonstrations. This foil electroscope combines straightforward operation with reliable insulation and sensitivity, making it a practical tool for teaching and basic laboratory work in electrostatics and magnetism.