The Model 5500 Salinity Bridge provides a means of measuring salinity values in the soil solution without continuous disturbance to the soil profile. The efficiency of measurement, both in the field and in laboratory setups, makes it possible to substantially increase the pace of scientific investigation and to observe dynamic changes in salinity values. Reads out directly in mmho/cm corrected to 25 C. Provides measurement of conductivity in the range of 2-40 mmho/cm. Battery powered