LOT OF 6!! HACH MET ONE 227A & 227B Handheld Particle Counter

New Hach Ultra 203015-3 237A Isokinetic Probe for Met One 237H Portable Counter

Met One Laser Particle Counter - 2082611-21 - 227A w/Warranty

HACH Met One Laser Particle Counter 227A HD Used F/S

AIRY Technology P311 Particle Counter Airborne Dust Monitor P311 Unit

Stone Breaker Particle Filtering Face Mask / Dust Mask FFP2 Pack of 2

HACH Met One Laser Particle Counter 227A HD Used

MET ONE 227B Laser HANDHELD AIR Particle Counter AS-IS NOT TESTED