Includes the testo 320 flue gas analyzer with O2 and CO sensor (without H2 compensation), USB mains unit, compact basic flue gas probe, IR printer, thermal paper, replacement filters, and instrument case and Omni Controls offers AEMC megohmmeter, a weather resistant meter resulting in accurate, reliable performance. An easy-to-use megohmmeter used for all insulation tests like DC generators, cables etc. AEMC 6527 is a handy megohmmeter measuring insulation resistance from 1k? to 4000M?.