AMT-YW/JS103 pavement water meter adopts hidden buried installation mode, which meets the needs of current urban landscape. Dual mode (ultrasonic and conductivity) working mode can solve the problem of product battery life very well, using the internal intelligent algorithm, automatically switch the measurement mode, effectively reduce the power consumption of the product. Electrical conductivity and ultrasonic wave use mode measurement to sense the change of water level. Due to the particularity of road water, the installation position of the equipment is in a water-free state in most of the time, so that the direct measurement of a single ultrasonic signal is a waste of electricity, which has an important impact on the battery use time of the product. So the introduction of four electrodes (backup each other), the use of electrodes to measure the conductivity of water to determine whether there is water, because the measurement of electrical conductivity of the work is very small power consumption, which can greatly improve the utilization of the battery. When water is measured, the device automatically switches to the ultrasonic measurement state. Of course, in order to ensure the reliability of the work, the ultrasonic wave will also be started regularly, and the conductivity measurement results will be composite judgment.