Regarding air particle counter instrument, Counter Beckman, Air Particles Counter, 3400+ model 3455 that I bought them from your company, I need to thanks all team of El Mehy company start from sales team to maintenance team and thanks for all steps you have performed to help us to use smart instruments with simple smart software and comply with last recommendations like 21 CFR part 11 .
Dr. Karam Hamdy
Micro-lab Manger