Patent ID: 7704357

Claim:
A potentiometric sensor connectable to a superordinated unit, comprising: an elementary sensor for registering a potentiometric parameter, representative of pH and temperature values; an interface for issuing a potentiometric-parameter-dependent signal to the superordinated unit; a digital data memory, permanently connected with said elementary sensor, an analog-digital-converter for converting an analog signal issued from said elementary sensor into a digital signal, and a microprocessor for control of said digital data memory and/or control of said interface for communication with said superordinated unit, wherein: the potentiometric sensor is a pH sensor, and said elementary sensor comprises a pH-electrode and a temperature sensor therein; said digital memory stores one or more of the following items or information; the calibration data of said elementary sensor; the sensitivity of said elementary sensor determined at a first temperature, especially 25° C.; the asymmetry potential determined at 25° C.; the temperature offset; logistical information; the serial number of said elementary sensor; the temperature range of application; the pH range of application; the extreme values of the operating temperature; the extreme values of the operating pH; the identification of a technician; the service life; the isothermal point of intersection; and said data memory further stores historical data over a moving time-interval of sensor operation, and/or event-dependent historical data.