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.
DC Amp meter. A DC amp meter is a simple amp meter. Direct current is measured through a resistor or shunt placed in line with the circuit. The voltage is measured across the shunt.he voltage drives a needle to help read the measurements of the current. This is called an indirect amp meter. Some AC amp meters are moving iron type amp meters. The magnetic field is attracted by a piece of metal mounted at one end of a needle. This type of moving iron amp meter can work also with DC.