3-Prong Liquid Level Indicator
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Discontinued. Verified 8/2012. RETAINED IN DATABASE FOR REFERENCE. The 3 Prong Liquid Level Indicator is an audible liqud level indicator designed for use by individuals who are blind or have low vision. This device alerts users to two levels of liquid in a container. At the lower level, an intermittent beep sounds. At the higher level, the beep is constant. The unit also vibrates. POWER: Uses one lithium battery.