The BW-JDSG240H portable gamma spectrometer is a nuclear monitoring instrument based on a sodium iodide detector and advanced digital nuclear pulse waveform processing technology. The instrument integrates a sodium iodide detector and a GM tube detector, which can monitor environmental dose in real time and distinguish the types of radioactive nuclides. The overall design is portable and equipped with a carry on bag, with a simple and clear interactive interface and easy button operation, making it convenient for staff to carry around and detect targets in a timely manner.This instrument can be widely used in fields such as nuclear industry, nuclear power plants, environmental protection, customs, radiation management departments, emergency response, military, disease control centers, etc....