sensION378 Meter measures pH, Dissolved Oxygen, Conductivity, TDS, Salinity, Temperature and includes Platinum pH electrode and Dissolved Oxygen probe. It's resistant to muddy hands, yet easy to clean. Resolution to 0.1, 0.01, 0.001; for the right accuracy when you need it. Backlit screen for easy night-time sampling. 5-pin connector for easy determination of temperature and your chosen parameter. Measures/compensates temperature in °C or °F. Built-in barometer for pressure compensation. User-activated calibration review, time and date stamps for GLP.       
Automatic buffer recognition with 4.01, 6.86, 7.00 and 10.01 buffers. Many color-coded buffers to choose from. Bi-directional RS-232 communication.       
Autocorrects for altitude, barometric pressure, and salinity.