——Water level recorder is a common hydrological instrument. In the ocean, there are shallow water with a depth of hundreds of meters and deep water with a depth of less than 1,000 kilometers. Below are two water level temperature recorders used in shallow water. Solinst 3001 Junior Water Level Temperature Conductivity Recorder The design is compact and waterproof; the data logger, temperature sensor, pressure sensor, conductivity sensor and battery are all integrated into a stainless steel waterproof cover measuring only 22 mm × 190 mm. The conductivity sensor is a four-core platinum electrode sensor, which can automatically change the range and is maintenance-free. The recorder comes with non-loss memory, which can store 16000 groups of data.
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HOBO U20 Water Level Temperature Recorder A very cost-effective automatic water level temperature recorder that can record changes in water temperature while recording water level changes. It is suitable for rivers, lakes, wetlands and swamps. The overall design uses a fully enclosed design that does not require the vents and desiccants of traditional pressure water level recorders to maintain work.
Features
? Fully sealed metal shell design;
? Data communication adopts infrared transmission;
? Use very durable ceramic pressure sensor;
? Data memory: 64K, can store about 21700 water level changes and temperature data;
? Collection interval: adjustable from 1 second to 18 hours.