The HI98199 is a rugged, portable multiparameter meter with a single digital probe input. The digital probe input allows the connection of either a pH, conductivity or dissolved oxygen probe. Between the three probes and a built-in barometric pressure transducer the HI98199 can measure up to 10 water quality parameters with 5 being measured by sensors and the other 5 by calculation (i.e. EC to TDS). This professional, waterproof meter complies to IP67 standards and is supplied with all necessary accessories to measure pH/temperature packaged into a durable carrying case.