Proposed method can significantly improve the accuracy of indirect measurements used for commercial accounting of hot water consumption. The method is based on the determination of the corrections to the measurement results allowing to exclude the influence of errors of the flow meters. Examination conducted by the example of the calculation of hot water consumption of a specific apartment house.

We propose a new technique of measuring geometric parameters of the relevant objects, i.e. products of complex shape. The mathematical model of photoprotection measuring method is developed. Identified distortion in the design of a coordinate grid on the profile object relative to the selected origin of coordinates, set label laser rangefinder. Derived analytical dependences defining the algorithm of operation of the device. The method of object digital image (the “cloud” of points) creation is described by using only rays of the projector external coordinate system on the flat digital image of a photo matrix.

To test the quality of the silicate enamel coating, the device diagram of the DEP-2M flaw detector is presented with some modifications of the device elements. This compares the metrological and technological characteristics of the DEP-2M defectoscope and advanced electric spark defectoscopes.

A Stefan-Boltzmann law for the integral radiation flux, based on Planck’s law for spectral radiation flux of an object, was derived by exact analytical way and full mathematical support.

Obtained dynamic characteristics of anisotropic magnetoresistive sensors. A mathematical model of the dynamic parameters of the anisotropic magnetoresistive sensor module.

The method of measuring parameters three-element non-resonant two-terminal with two reactive elements in the two harmonic signals, based on the analysis of the results of direct measurements of currents flowing through these two-pole and phase shifts feeding on them alternating voltages of two fixed frequencies. To create algorithms to use pie charts known two-terminal current. The technique is based on the construction of the iterative process of calculating the angles of a pie chart. It is shown that the proposed method can with some minor modifications be used to measure the non-resonant two-terminal three-element parameters with a single reactive component.

Solutions for optimizing the structure and parameters of the spectral-filtering measurers of signals parameters aimed at expanding their frequency range and providing for measurements at low signal-to-noise rations are obtained.