PLS-K-100 single point laser ranging module is a product developed for fast and accurate ranging. Using the principle of phase time-of-flight method, the maximum measurement distance can reach more than 100m (combined with 90% reflectance/indoor of the cooperative target), and the accuracy can reach mm level. The distance value between the target can be accurately measured without contact. The measurement frequency is 0.1-3Hz, the response time is fast, and the frequency can be set by the upper computer. The PLS-K-100 module uses 635nm red laser measurement and can be integrated in high-precision phase measurement applications, including liquid level meter measurement (with cooperative targets), accurate positioning of indoor large equipment, material level meter and other applications.