Temperature sensors are designed for measurement of thermal variations in soils, structures, and fluids, providing essential data for geotechnical analysis and for thermal compensation of instrumental measurements. They are available in multiple configurations, including submersible versions, sensors designed for embedding in concrete, installation in soil, surface-contact applications, and mounting on metal structures or reinforced concrete (R.C.). The sensors are housed in high-strength stainless steel enclosures with IP68 protection, suitable for permanent installations even in harsh environments. The sensors can be used individually or in multi-point configurations (temperature strings), enabling distributed measurement along vertical profiles or complex structures.