Portable instrument for the detection of pH, Rx, conductivity, temperature, liquid resistivity, total dissolved solids and salinity. Includes maximum, medium and minimum value storage. RS232C output for real-time data transfer to a PC or printer. REL, HOLD and auto power excludable functions, automatic/manual calibration; IP66 protection; supplied with carrying case, 4 batteries, instruction manual and management software. Electrodes, probes, buffer solutions and connection cables are not included and must be ordered separately.