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May 18, 2010
Renau's New Speech Synthesizer Module Helps Kitchen Staff While Cutting Down on Noise...
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March 30, 2010
Renau Electronic Laboratories is proud to announce the release of our new STM-04 Smart Thermocouple Module...
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March 30, 2010
Renau Electronic Laboratories again demonstrates the power, flexibility, and ease-of-use...
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June 10, 2009
Renau's Innovative UCM-1000V Offers Design Flexibility for Equipment Manufacturers While Significantly Simplifying Training...
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July 18, 1989

Renau Awarded United States Patent 4,849,098 for Continuous Water Quality Monitor

Renau has been awarded United States Patent # 4,849,098. This patent is for an automatic monitor for potable water quality which monitors total dissolved solids (TDS) in drinking water. Built into a faucet base are a pair of indicators in the form of one green and one red LED. A sensor in the form of a pair of spaced electrodes extends into the supply conduit for the faucet and measures the electrical resistances of the water in the conduit. A pulse power source powered by a battery supplies power to automatically periodically power the sensor and illuminate the green LED as long as the TDS level is below a preselected value. If the level exceeds the preselected value, the red LED is periodically illuminated. The duty cycle for operation and illuminating the LEDs is approximately 0.5% whereby battery drain is sufficiently low that months of continuous monitoring is possible using 4 AA batteries. No ON-OFF switch is needed. If neither LED illuminates once every two minutes, the batteries need replacement.