Insulators are an important component of the operation of power plants and substations. They play the role of supporting wires and insulation. Their working status directly affects the safety of power supply to the power grid. Because insulators have no inherent deformation and extremely low toughness, most porcelain insulators have long been subjected to the mechanical load of the power grid and the influence of severe weather such as wind, snow and sun. The additional stress increases and concentrates, which leads to rapid expansion of internal defects, which is extremely easy Causes brittle fracture of porcelain insulators, causing serious grid accidents. "Insulator flaw detector" is a miniaturized portable ultrasonic flaw detector, suitable for the assessment and location of material defects, wall thickness measurement, etc. It is especially suitable for the requirements of various insulator materials for flaw detection. Pay attention to the following points when buying: 1. It is necessary to have a large-screen TFT display with high-brightness and high-definition true color, and a significantly enhanced human-machine interface effect. 2. Advanced and safe lithium polymer battery and power management technology, automatic alarm and protection. The automatic standby screen saver can be set to make the equipment more energy-saving and more effective, and to ensure the continuous and efficient inspection work. 3. Application software integrating intelligence and powerful processing functions, direct-reading user interface and operation mode, or digital knob one-key operation mode. The intuitive effects of quick WYSIWYG fully reflect the functions and charm of digital instruments. 4. Variable width square wave pulse generator and variable voltage transmitter, so it has variable transmission power. Multi-level damping settings make the probe match the instrument best. 5. It must have good amplifier characteristics and frequency band characteristics. The amplifier has a precision of 0.1dB, wideband and narrowband working modes, and the measured probe frequency, for users to provide better detection results when testing different materials. 6. It must have a detection range as far as 10 meters and a strong signal resolution capability, and a continuous adjustable range of minimum 0.1mm. Choose the appropriate range and the corresponding probe to get a good near-field resolution.