Labtron Portable Nitrogen Gas Detector monitors N₂ concentration using electrochemical sensing for industrial safety, laboratory monitoring, and confined space applications while detecting 1–5 gases simultaneously and measuring range 0–100% VOL, 0.01% resolution, ±2% FS accuracy, and response under 8 seconds. Built-in pump provides 10-step flow control (0–500 ml/min). IP66 housing, 3.5-inch LCD, USB download, optional Bluetooth/LORA, and 100,000-record storage support field data management.