The article presents the results of the first stage of the development of the optimal design of the stress sensor, which allows to evaluate the stress-strain state of the section inside the experimental reinforced concrete structure. The task was to develop a voltage sensor with high structural strength (the ability to maintain  operability at a pressure of more than 350 kg / cm²), stability of measurement results, as well as ease of manufacture. The experience of using voltage sensors based on various physical principles is considered, as well as a brief historical background of the development of methods for determining the stresses of building structures of buildings and structures is presented.

The publication is the second part of a study devoted to the development of an optimal design of a voltage sensor that allows the determination of stresses in the cross section of small-sized laboratory samples of monolithic solid-state structures made of concrete, reinforced concrete, polymer concrete, gypsum and other monolithic materials. The tasks of the experimental design were the development of a stress sensor designed to work inside monolithic structures, which has the ability to stably make measurements during the appearance and formation of cracks, as well as ease of manufacture and low cost of the components. The developed sensors make it possible to determine stresses in laboratory structures with high accuracy without significantly affecting the stress-strain state of the section, which makes it possible to determine the stress state of the section at different stages of the structural element.

In the first part of the study, the results of which were presented in the materials [2], the experience of using voltage sensors based on various physical principles was considered, as well as a brief historical background of the development of methods for determining the stresses of building structures of buildings and structures was presented. The results of experimental design of the voltage sensor housing made of polymer materials (epoxy resin) have been published. The requirements for the housing of a voltage sensor suitable for use in laboratory structures have been determined.

This publication discusses the design solution of the sensor housing made of duralumin alloy, a material that meets most of the developed requirements.