Abstract: A smoke detector with an easily-readable battery-life display is an apparatus that visually displays the remaining battery life for a smoke detector through an analog or digital device. The apparatus primarily includes a smoke detector, a battery power indicator, and a reference resistor. The battery power indicator is positioned on the underside of the smoke detector so that a person can look up at the smoke detector mounted on a ceiling and view the battery power indicator. The reference resistor draws a small amount of current from the battery, which allows the battery power indicator to measure the gradual reduction of voltage readings across the reference resistor and consequently determine the remaining battery life, and thus displaying the remaining battery life in the appropriate zone (red, yellow or green).

Abstract: A smoke detector with an easily-readable battery-life display is an apparatus that visually displays the remaining battery life for a smoke detector through an analog or digital device. The apparatus primarily includes a smoke detector, a battery power indicator, and a reference resistor. The battery power indicator is positioned on the underside of the smoke detector so that a person can look up at the smoke detector mounted on a ceiling and view the battery power indicator. The reference resistor draws a small amount of current from the battery, which allows the battery power indicator to measure the gradual reduction of voltage readings across the reference resistor and consequently determine the remaining battery life, and thus displaying the remaining battery life in the appropriate zone (red, yellow or green).

Abstract: A system for a deep water-well gauge is used to determine the volume of the remaining water within a deep water-well. A laser rangefinder is mounted to the top of the deep water-well and allows the system to measure the distance from the top of the deep water-well to the top surface of the volume of remaining water. This distance is known as the static water level, which can be viewed by a user through a display panel. The user can then input the static water level and the known dimensions of the deep water-well into a conversion chart in order to get a value for the volume of the remaining water. Both the display panel and the laser rangefinder are powered by a portable power source such as a battery.

Abstract: The present invention is a well gauge used to indicate the relative depth of water inside a shallow well. Specifically, the present invention is water well gauge with a calibrated pipe, which visually displays various quantities of water within the well. The calibrated pipe or the floating shaft of the present invention is to be floated perpendicularly to water surface within the well. The shaft is supported by a group of buoys, which floats in line with the water in the well. The buoys are positioned radially around and perpendicularly to the shaft. The present invention further comprises a collar which helps position the shaft vertically and perpendicularly to the water level. The calibrated pipe of the present invention can be read in the absence of light due to an attachment of a solar light-emitting diode (LED). With the present invention installed, water user can regulate water more effectively.