Measurment Instruments
Measuring tools and instruments are used to measure various physical, chemical, qualitative and quantitative parameters and various electrical parameters. Some of these measuring devices are also used in our daily lives, for example a simple thermometer that determines the temperature of the room or kitchen oven or baby fever for us or a ruler, a meter that measures the dimensions or distance of two The place is used or the pressure gauge with which we test the car tire pressure. These physical parameters can be temperature, pressure, humidity, light intensity, atmospheric pressure, dimensions and distance or length and weight or force, etc. Chemical parameters such as the amount of acidity or alkalinity, concentration or amount of fluid conductivity, etc., and qualitative parameters such as liquid turbidimeter and, as you are all familiar, electrical parameters such as volts or amps and power, resistance and ...
In each measurement we are confronted with three concepts and quantities of magnitude or numerical value , unit or sex of quantity and the concept of uncertainty and accuracy. The main quantities in the scientific measurement system include seven time parameters based on units of seconds, length In meters, mass is in kilograms, electric current is in amperes, temperature is in Kelvin, the amount of matter is in moles, and light intensity is in candelas.
Other physical quantities such as concentration, viscosity, fluid flow, etc. are expressed based on these basic units.
Proportional measuring devices are used to measure the expressed quantities and parameters. In measurement science, due to the inherent uncertainty in the laws of physics, various factors affect the quality of measurement, which is the source of various errors in the device, and therefore in the purchase of this equipment, accuracy or accuracy is one of the most important factors. Truth The value of measuring instruments is evaluated based on accuracy, response speed, reproducibility, and range of suffering covered.
