1. Air-to-nitrogen ratio If this indicator is proposed in the early stage, it depends on whether the compressed air finally consumed by the nitrogen generator meets this requirement.

2. Gas purity and volume. Be sure to check the purity under the rated air volume, or the air volume under the rated purity. The characteristics of the nitrogen generator are: the lower the gas output, the better the index. Don't just look at the same. Precautionary points: In order to make the nitrogen generator indicators qualified,
Some manufacturers use special methods: 1. Modify the meter reading. For example, add a base value to the meter. For example, the actual purity is 99.5%, and 0.05% is added inside the instrument, and the result shows 99.99%.
2. Customized special flowmeter. Customized with the instrument manufacturer, the float of the flowmeter is deliberately lightened, so that the displayed value is too large. For the instrument with digital display, modify the internal parameters to make the displayed value larger by a certain multiple. In the above situation, if there is no problem with the product, generally there is no need to worry and think about it. If the product is not good, it is necessary to verify whether the measurement of the instrument is accurate.