Onset Computer Corporation announces its expansion into the water level market with the HOBO® Water Level Logger, a low-cost data logger for recording water level and temperature in groundwater wells, streams, lakes, wetlands and tidal areas. The HOBO is a pressure-based water level recording device that combines research-grade accuracy and durable construction to extend product life. Unlike traditional water level loggers that rely on cumbersome vent tubes and desiccant packs for operation, the Onset unit operates as a stand-alone unit.