Analysis instrument with logger function and GLP function for meas­ure­ment of pH, mV/ORP-COND-TDS-Salinity and temperature. Various sets with Cond cell 2301 T and with or without (DHS) pH electrode 201T. The Set consists of instru­ment, cable, buffer solutions pH4, pH7 and conduct­ivity solu­tion, storage solu­tion, soft­ware and cable for commu­nic­a­tion and data transfer to PC/​Note­book. Hand­held instru­ment for meas­ure­ment of pH- and condu­civity values in labor­at­ories and during produc­tion.