In view of the problem of water droplets and condensation affecting liquid level measurement by users in the water industry, Beijing Ou Shiyuan Environmental Company introduced the LT-200 ultrasonic liquid level meter of the Korean LETECH brand to use it in foggy and humid areas, rainy days or When condensation occurs due to temperature differences and it becomes impossible to measure with ultrasonic waves, this product adopts an arc shape in the sensor to quickly gather the condensation to the center of the surface and make it drip automatically, and the surface vibrations 5 times per second can vaporize water. molecules, thereby solving various problems that occur when condensation occurs. (Patent Office Utility Model Registration: 20-044-0512). Pretty good.