Field exploration operations such as geological exploration, petroleum field investigation, outdoor environmental monitoring, and mining engineering have put forward special requirements for nitrogen supply equipment: small size, light weight, portable movement, low energy consumption, and strong environmental adaptability. Conventional large fixed nitrogen generators are bulky and dependent on fixed power supply and installation space, which cannot adapt to complex field working conditions. Portable small nitrogen generators specially developed for field exploration scenarios have diversified model specifications, which can meet the low-flow, stable, and portable nitrogen supply needs of various field exploration operations, and have become essential supporting equipment for modern field engineering exploration.

The mainstream models of field exploration portable small nitrogen generators are divided into membrane separation type and miniature PSA type, with complete specifications covering small flow rates of 0.1–10 cubic meters per hour. The membrane separation portable models are represented by low-power mini-type equipment, featuring ultra-light body, compact structure, and fast startup. This type of model has low requirements for power supply, can adapt to 220V civil power supply and portable mobile power supply, and can output nitrogen with a purity of 95%–99.5% stably, which is suitable for conventional field pipeline purging, exploration equipment protection, and sample preservation scenarios. The miniature PSA portable models are upgraded high-purity models, adopting miniaturized double-tower adsorption structure, with nitrogen purity up to 99.99%, meeting the high-purity nitrogen demand of field precision detection and experimental sampling.

All field exploration dedicated models have targeted environmental adaptation and portable optimization design. The equipment is equipped with a fully enclosed dustproof and waterproof shell, which can adapt to complex field environments such as high dust, high humidity, and variable temperature, avoiding equipment failure caused by external environmental interference. The whole machine is lightweight and equipped with portable handles and universal moving wheels, which is convenient for manual handling and short-distance mobile operation in the field. The intelligent energy-saving control system can automatically adjust operating power according to the gas consumption demand, reducing field energy consumption. In addition, the equipment has low noise and low vibration operation performance, no oil pollution and no exhaust emission, meeting the environmental protection requirements of field exploration. Different model specifications can match diversified exploration scenarios: ultra-small flow models are used for field sample preservation and instrument protection, and medium flow models are used for field engineering purging and pressure test operations, fully covering the nitrogen supply demand of field exploration work.