###### Abstract  
Determination of nozzle quality ratings based on macroscopic and microscopic parameters generally requires the use of separate measurement methods in research. The guiding idea determining the direction of the conducted research was to use a 2D (two-dimensional) laser analyzer LDA/PDA (laser Doppler anemometry/phase Doppler anemometry) to evaluate the values of selected micro and macro parameters (microstructure characterization with simultaneous evaluation of lateral distribution) of the spray. The research was conducted for variable measurement times. The main issue of the research was an attempt to reduce the measurement cycle time, important in the case of point tests performed with an analyzer. The scope of the conducted research covered three areas. In the first stage of the research, the variability of the coefficients characterizing the spray spectrum as a function of variable measurement time was analyzed. In the next, the value of the coefficient of transverse volume distribution (for a single sprayer) was determined. The results were determined on the basis of the volume diameters obtained from measuring the droplets with a 2D LDA/PDA analyzer. In the third stage, an attempt was made to combine the volume distribution results obtained for single nozzles on the boom. The results obtained were compared with those determined using a groove table. Both measurement methods used a different representativeness in volume measurement (sampling method and significantly different amounts of liquid analyzed); nevertheless, the results of the transverse volume distribution were found to be consistent. sprayer; droplet spectrum; spray characteristics; spray quality; laser anemometry; measurement time; groove table 202517 June 2025  
design of new solutions related to agricultural nozzles. In their article, [PERSON] et al. describe the course of their research on a new two-stream nozzle capable of generating very fine droplets for use in greenhouse crops [11]. In their study, [PERSON] and [PERSON] describe the use of electrostatic technology to improve spray application technology characterized by low energy expenditure and high efficiency of chemical use [12]. Depending on the treatments used, different types of spray nozzles are used. The most popular of these are flat-fan nozzles: standard, injector, ejector, and vortex nozzles [13]. The presented division of nozzles is made mainly on the basis of macroscopic and microscopic characteristics of the liquid jet produced. The main macroscopic parameters include the operating pressure [14], the unit jet output, the spray angle [15], and the coefficient of variation (CV) of the transverse distribution of the liquid [16; 17]. Uniform distribution of the sprayed liquid ensures optimal use of the chemical, with effective chemical protection of plants, minimal costs associated with the use of the chemical, and low environmental pollution. Determination of the coefficient of variation is carried out on standardized groove tables according to current standards. The CV value is determined for the entire spray boom (for all nozzles simultaneously) and for a single nozzle. In the latter case, we do not need to have a table with large dimensions. In order to obtain the CV index for the entire boom, the results of volume distribution tests determined for individual nozzles should be assembled on a so-called \"virtual\" spray boom. Nevertheless, in each of these two cases, we must have a standardized groove table. Microscopic scale studies also play an important role. Droplet size is classified by the American Standard ASABE S57.1 [18]. The standard divides droplet size into eight ranges, starting from smallest to largest droplet size: extremely fine, very fine, fine, medium, coarse, very coarse, extremely coarse, ultra coarse. Droplet size is important in the process of applying chemicals. Droplets with small diameters (very fine, fine) evenly cover the surface of plants while ensuring optimal use of the chemical.