https://www.ebay.com/sch/i.html?_nkw=Allegro+9900+45+Ambient+Air+Pump+Co+Monitor+Kit&_sacat=0&_dmd=2

Allegro 9900-45 Ambient Air Pump Co Monitor Kit

Regular price
$987.00
Sale price
$730.00

Allegro Industries has been dedicated to offering high quality safety equipments, which will make safety compliance easier. Offering a complete line of products within specific categories including respirators, air sources, ventilation equipment, ergonomics, respiratory accessories, eyewear maintenance, and confined space equipment, we are the reliable single source of safety equipment. Connects inline to outlet of any Ambient Air Pump to monitor and warn of any dangerous levels of carbon monoxi