In scientific experiments, nitrogen is widely used as a shielding gas, carrier gas or reaction medium in fields including chemical synthesis, material preparation and food preservation. Nevertheless, experimental scenarios vary greatly in requirements for nitrogen purity, flow rate and supply mode, and general purpose nitrogen making equipment often fails to satisfy specific demands. Under such circumstances, custom manufacturers of laboratory nitrogen generators deliver precisely matched solutions for research institutions through personalized design. This article analyzes the core value of custom nitrogen making equipment from three perspectives: technical principles, custom built advantages and industry trends.