GX-701 water level alarm collection consists of two parts water and water level observation alarm composition, acquisition and alarms connected via wireless communication. When the logger to monitor the water level over the threshold automatically triggers alarm activate voice (sound and light) alarm. With a yellow, orange, red warning alert level three. Mainly used to monitor the water level in the field flood disasters. Can be linked with a warning broadcast to achieve water level alarm, pre-alarm warning broadcast linkage.