Air Systems International CO2-91LAC Portable O2 CO Monitor schaefer z1-12ck Holds 150 feet of 4-inch

Holds 150 feet of 4-inch hose

Filter & a carbon activated high capacity filter

Minimal water consumption

AR-500 (abrasion-resistant) ¼” (0

Galvanized Blade

Air Systems International CO2-91LAC Portable O2 CO Monitor schaefer z1-12ck Holds 150 feet of 4-inchAir Systems International CO2 91LAC Portable O2 CO Monitor Air Systems CO2 91LAC easily connects to filtration sources for breathing air, ambient air pumps & monitors your air for dangerous CO content. Air Systems CO2 91LAC features an audible alarm of 90 dBA and also monitors the air for O2 levels. The alarm and light is incorporated in its design get activated when CO content exceeds 10ppm (5ppm for Canadian models). Its external alarm with light