Geotechnical investigation drill hole water level measuring instrument

According to the technical scheme, the drilling water level measuring instrument is characterized in that through a through groove, a positioning plate, a connecting block, a roller, absorbent cotton, an adjusting frame, a threaded sleeve, an adjusting rod and a banister brush, cleaning work can be carried out when a ruler tape is wound after water level measurement is completed, water stains and muddy water attached to the ruler tape are reduced, and the measuring accuracy is improved. The water level measuring instrument has the advantages that the water level measuring instrument is simple in structure and convenient to use, the overall use neatness is improved, meanwhile, the aging condition of the ruler belt during storage is avoided, the service life of the water level measuring instrument body is further prolonged, and therefore the rusting condition of the water level measuring instrument body during storage is avoided; the water level measuring instrument is simple in structure and convenient to use,