Automated system comprised primarily of a filter wash device, fluid hoses, debris sensor, debris capture basket, particle count display, and control computer for cleaning used oil filters and recovering and analyzing debris collected therefrom

FILTER CHANGE MONITOR SOLD AS AN INTEGRAL COMPONENT OF HUMIDIFIERS; AND FILTER CHANGE MONITOR SOLD AS AN INTEGRAL COMPONENT OF AIR PURIFIERS

test kits for testing gas-phase air purification equipment for efficiency and service life