DUAL SPHERICAL ELECTRIC FIELD STRENGTH SENSORS WITH ATTACHABLE, COMPOSITE AND SEPARATE SENSITIVE ELEMENTS AND THEIR COMPARATIVE ANALYSIS

Electric field strength sensors are an integral part of measuring instruments and systems. Their correct choice determines the creation of devices and systems with high metrological characteristics. This paper examines a comparative analysis of known dual electric field strength sensors with attachable, composite, and separate sensitive elements based on the phenomenon of electrostatic induction. The comparison involves the technological and design parameters of dual sensors and their metrological characteristics. The complexity of the sensor measuring devices is also compared. All the analyzed dual sensors have almost identical technological and design parameters. Dual sensors with attachable sensitive elements have little complexity in terms of technological and design parameters. Dual sensors with composite sensing elements have slightly complicated measuring working. The strong difference between the analyzed dual sensors can be seen in their metrological characteristics. It has been established that dual sensors with separate SEs of the second version have the best metrological characteristics. Such sensors provide an error due to field inhomogeneity not exceeding  = 0.9% and a maximum spatial measurement range of 0 < a < 1 with angular dimensions of the sensitive elements 11 = 35.6, 21 = 90, 12 = 0, 22 = 35.5. Dual sensors with separate sensitive elements of the first design have an error not exceeding  = 2% and a maximum spatial measurement range of 0 < a < 1 with angular dimensions of the sensitive elements 11 = 40, 21 = 90, 12 = 0, 22 = 35.5. Dual sensors with attachable SEs of the first design and with composite SE of the first design have almost identical parameters. Such sensors have a positive error due to field inhomogeneity not exceeding  = 4.6% and a maximum spatial measurement range of 0 < a < 0.92. The metrological superiority of dual sensors with separate sensitive elements of the second version over other analyzed dual sensors is noted; they, first of all, should be given preference in use.