The Analytical Industries Palm N2 Analyzer measures the nitrogen concentration in tires. Utilizing the company's galvanic fuel cell and a two-button keypad, the analyzer provides reliable nitrogen readings in seconds, according to the company. Testing the nitrogen concentration is a similar process to checking tire pressure. According to the company, tires filled with nitrogen hold pressure longer and are unaffected by the oxidation that leads to tread separation. The red, handheld Palm N2 Analyzer has a 12-month warranty.