Electrostatic testers are devices used to measure the static charge on surfaces or objects, providing accurate and reliable electrostatic measurements. They are used in applications such as electronics manufacturing, cleanroom environments, and industrial processes, ensuring precise static control. Electrostatic testers offer features such as high precision, digital displays, and various measurement modes, making them essential for maintaining static-free environments. Their ability to provide reliable electrostatic measurements makes them valuable for protecting sensitive components and ensuring process efficiency.