Nitrogen concentration meter with built-in sensor AJX-N2B 1 unit

This is a concentration meter exclusively for gas replacement. It displays 100 - oxygen concentration (%), so you can see the degree of nitrogen or argon gas replacement at a glance. It can be used for storing electronic components with N2, for lead-free soldering with N2, desiccators, glove boxes, and for filling with nitrogen. Measurement principle: Galvanic battery type Measurement gas: O2 (oxygen) Display value: 100-oxygen concentration (%) Resolution: 0.1% Measurement range: 100 to 70% (N2) Measurement accuracy: ±0.5% (100-70%) Power supply: 2 AAA alkaline batteries (UM-4) (included for testing) Product size: 88 x 35.5 x 55 mm Model number: AJX-N2B Built-in sensor Oxygen concentration conversion *The displayed value is 100 - oxygen concentration (%). It is not a strict measurement of nitrogen concentration. *It does not have an alarm, so it cannot be used as an oxygen deficiency alarm.