Frequently Asked Questions
- CTD-10/HYDROS 21 Is the CTD-10 (HYDROS 21) electrical conductivity measurement temperature corrected? Yes, the bulk electrical conductivity (EC) value is already temperature corrected within the sensor using the temperature correction outlined by the US Salinity labs Handbook 60. Values for EC in tap water can range from 100 to 800 microS/cm (0.1 to 0.8 mS/cm).The CTD (now called HYDROS 21) uses the temperature to adjust the EC measurements to their 25 ◦C default value and provides the temperature output for the data stream.
- SUPPORTING SENSORS - CTD-10/HYDROS 21 Can the CTD-10 survive a winter?
Possibly. If the sensor is in water, it must not be allowed to experience temperature below freezing (0 ◦C or 32 ◦F). If water freezes in the CTD sensor pressure transducer cavity, then ice formation will ruin the pressure transducer.