The five types of white cells and the approximate percentage they make up in the blood are: 1  Neutrophils (55% to 70%) 2  Band neutrophils (0% to 3%) 3  Lymphocytes (20% to 40%) 4  Monocytes (2% to 8%) 5  Eosinophils (1% to 4%) 6  Basophils (0.5% to 1%)
A sound level meter is an instrument that can measure sound level, commonly used in noise pollution studies for the quantification of different kinds of noise, especially for industrial, environmental and aircraft noise. common variant of the sound level meter is a noise dosemeter (dosimeter in American English). However, this is now formally known as a personal sound exposure meter (PSEM) and has its own International standard IEC 61252:1993.
Sound Level Meters. Whether you need a simple optimus yellow for community noise checks, an optimus red for OSHA compliance and occupational noise measurements or an optimus green for outdoor and environmental noise measurements, we can provide you with the solution that matches your needs.lass/Type 2 Sound Level Meters. The optimus green are the part of the optimus family and are designed for environmental, occupational, industrial and simple noise applications.