Instrument: Water Temperature Sensor
General term for an instrument that measures the temperature of the water with which it is in contact (thermometer).
Onset Tidbit temperature loggers (http://www.onsetcomp.com/products/data-loggers/utbi-001) at 10 minute intervals. Loggers were attached to subtidal rock walls at 12-15 m depth . They are downloaded approximately twice a year. The temperature loggers have an accuracy of 0.2 degrees C.