TEA-treated molecular sieve (400mg) plus oxidizer (400mg) plus TEA-treated molecular sieve (600mg) tubes; 10/set.

Replaces 226-40. Tube 1 (7x70mm, 400mg Molecular Sieve treated with TEA) collects NO2. Tube 2 (7x110mm, 400mg treated silica gel oxidizer) converts NO to NO2. Tube 3 (7x110mm, 600mg Molecular Sieve treated with TEA) collects NO2. The NO2 ion is determined during analysis and labs use the SKC-supplied formula/graph to calculate NO ppm.