Observator offers sensors and data loggers from SonTek and Seametrics for conductivity, temperature and pressure (CTD).

• Seametrics T1/T1R: Smart Temperature Sensor with SDI12/Modbus output.
• Seametrics CT2X: CTD with data logger for conductivity, temperature and pressure.
• SonTek CastAway: Autonomous handheld CTD meter with internal data logger and display.