Abstract: This paper introduces the principle, installation and operation aspects of the Diver automatic groundwater level monitoring device. The application of this device in a pump test in the Airport Road Station of Nanjing No. 5 Metro Line is also presented in this paper. The groundwater level and water temperature were automatically collected in the pump well and the water level in the observation well is collected using conventional method. Throughout comparison of data from automatic device and conventional data collection methods, it is evident that the automatic monitoring device has the advantage of groundwater level, temperature measurements and collecting time setting, data acquisition, data processing and labor cost. The results are more reliable and more timely results and cost effective.

Key words: dive automatic groundwater level monitoring device, groundwater level, steady state pump test, nonsteady state time, coefficient of permeability