International system of units. Rules for writing units of the SI. Definitions of units and their measures. Processing measurement information. Precision and accuracy. Measurement errors. Indirect measurements and error calculus. Measurement uncertainty. General characteristics of measuring instruments. Measurement of DC currents and voltages. Ammeters with moving coil. Galvanometers. Measurement errors of ammeters. Voltmeters with moving coil. Potentiometers. Digital voltmeters. Digital ammeters. Digital multimeters. Errors of digital instruments. Measurement of AC currents and voltages. Instruments with moving coils and signal rectifiers. Instruments with moving iron. Current clamps. Measuring power and energy. Electrodynamic instruments. Digital wattmeters. Measurement of resistance. Ammeter and voltmeter methods. Ommeter method. Measurement bridges. Measuring capacitive and inductive impedance. Measuring capacitance. Measuring capacitance of electrolytic capacitors. Measuring inductance. AC bridges. Frequency measurement. Digital counters. Measurement of resonating frequency. Measurement of spectrum. Measurement transducers and sensors. Thermoresistive sensors. Thermocouples. Non-contact temperature measurements. Passive and active thermography. Principles of electrical measurements of force and strain. Strain gauges. Piezoelectric sensors. Measurement of displacement of solid bodies using capacitive and inductive sensors. Displacesment measurement using optical sensors. Reflectometry, refractometry and interferometry. Principles of measurements of static and dynamic parameters of fluids. Measurements of fluid pressure, velocity and level.