... germs. Capacity of the counter is from 0 to 999, the button return back to " o" automatically. When error in counter, push ... or add. With sensor, it's sensitive, incl sound indicator, to ensure the counting is correct. This instrument supply with special ... position with flexible arm. The magnification up to 3x,it's easy to compare bacteria, apply to Petri dish from Ø50-Ø150mm.Technical Data ...