The dataset provides a comparison between an expensive depth sensor, the "US331-000005-030PA", and a cheaper sensor, the "B07YZLCSRP". The dataset includes the ADC values from both sensors as well as the offset between them. Data were collected using an autonomous underwater profiler called s-Nautilus at the Real Club de Regatas de Cartagena. During this test, the s-Nautilus profiler was moved to various depths, and the time and 12-bit ADC values from both sensors were recorded. The recorded variables include: timestamp UNIX (s): the timestamp indicating the date and time of each measurement. hours (hh:mm:ss): time of recording of each measurement. incr_time (s): cumulative time increment for each measurement. ADC cheap sensor (unit of ADC of 12 bits): 12-bit ADC values of depth sensor "B07YZLCSRP" at various depths of the s-Nautilus. ADC expensive sensor (unit of ADC of 12 bits): 12-bit ADC values of depth sensor "US331-000005-030PA" at various depths of the s-Nautilus. ADC difference (unit of ADC of 12 bits): difference in ADC values between the two sensors. ADC + offset (unit of ADC of 12 bits): ADC values of depth sensor "B07YZLCSRP" adjusted by calculated offset. average ADC differences (unit of ADC of 12 bits): average offset ADC for all measurements.