SensoDirect pH 200 For pH, ORP measurement and temperature measurement (Pt1000 or NTC 30kOhm). The water-tight housing complies with IP67.	SensoDirect COND 200 For Conductivity, Total Dissolved Solids(TDS), Salinity and Temperature measurement. The water-tight housing complies with IP67.	SensoDirect DO 200 For Oxygen Concentration, Saturation, Partial Pressure and Temperature Measurement. The water-tight housing complies with IP67.