strain gauge uses

The core purpose of strain gauges is to measure minute deformations on the surface of objects. But when it comes to construction sites, things can get complicated. The strain gauges produced by Kingmach are mainly used for geotechnical and structural monitoring, such as stress changes in tunnel linings, load distribution of foundation pit supports, indirect measurement of lateral displacement of pile foundations, etc. A typical example is during subway tunnel construction, where embedded strain gauges need to be installed on segments to continuously record the strain development of concrete. This application places high demands on the long-term stability of the sensor, since data is collected continuously for many months. Our strain gauges use temperature self-compensating alloy foil, and the temperature drift can be controlled within 1 με/℃ in the range of -20℃ to 60℃, which is more practical for outdoor projects. Another common use is to cooperate with the steel stress gauge and tie it to the steel cage before pouring to monitor the stress state of the pile body. This usage requires the strain gauge to have sufficient waterproof and impact resistance. We cover the surface of the sensitive grid with multiple layers of sealing coating to withstand the impact during concrete pouring. Some projects will also use spot-welded strain gauges, which are directly fixed on the steel support surface. The installation time is more than half faster than the adhesive type. Behind these different uses is actually the choice of installation method and environmental adaptability. Kingmach provides services from selection consultation to on-site guidance, because in many remote construction sites, a sensor failure means data interruption, which is very costly. Our engineers usually advise customers based on actual working conditions rather than just looking at the parameter table.