The ESSA/B series elastic strain sensors are designed to detect tensile strain and displacement in human bodies or objects. These sensors utilize a proprietary elastic nano-conductive material as the core sensitive element, encapsulated within textile materials. They can be integrated onto the surfaces of elastic substrates such as textile fabrics and leather, offering high elasticity, high sensitivity, and rapid response characteristics. When paired with our high-precision wireless detection system and related algorithms, these sensors can measure real-time data such as tensile strain, displacement, bending angles, and pulling force. They are widely used in various fields including smart wearables, health monitoring, human-computer interaction, and structural safety assessment.