With its fully sealed design and advanced power-conserving microcomputer technology, the TruBlue 555 Level submersible transducer and data logger is part of Pressure Systems’ new product line specifically designed for monitoring water level and quality in environmental and watershed management applications including groundwater, surface water and storm water. With an internal memory of 8 MB, the transducer is capable of storing up to 550,000 level and temperature measurements. Its internal 3.6V lithium battery has a lifespan of five years.