PCE Americas Inc. - The PCE-430 is a class 1 #sound level meter that meets IEC 60651:1979, IEC 60804:2000, IEC 61672-1:2013, ANSI S1.4-1983 and ANSI S1.43-1997 requirements. This portable high-accuracy class 1
Sound level meter - Wikipedia
Casella CEL 620.A Type 2 Wide Range Integrating Sound Level Meter Kit