If youre working in the field of community comfort or occupational health controlling noise levels, then Type 2240 Class 1 Integrating-averaging Sound Level Meter is a well-suited companion. Not just good looking, Type 2240 has extremely easy to use interface for quick and simple measurements. Accurate, reliable and affordable, Type 2240 measures time-averaged sound level as defined by the IEC 616721 Class 1 standard, and complies with IEC 60651 Type 1, and IEC 60804 Type 1 standards as well as ANSI S1.4 and S1.43.