Presentation

=__This is where we will be collecting the material for our final presentation. RAIN GUAGE__= = = = = =​A Demo of rain guage= This is a rain guage that measures rainfall from the gutter of a roof. The rainfall is caputered from the gutter into a recever tank then piped down into the main tank. The ballcock rises with the level of water which operates a potionemeter. This then connected to wheatsone bridge and a buffer opamp to give me an ouput voltage. By calculaying the surface area of the roof and the surface area of the tank I can scale the depth of rainfall

Roof dimensions

Roof length = 9.7 metres Slope length = 4.8 metres Surface Area = 46.56metres sq Millimetres = 46560000mm sq

Tank Dimensions Length = 390mm Width = 225mm Surface Area = 87750mm sq = = = = =media type="file" key="MOV01639.3GP" width="300" height="300"=





The potionemeter gets activated by a light metal rod that is attached to a metal plate that sits over the ball cock which rises with the level of water in the tank.



When the water in my tank reaches maximum level the ball cock closes and stops the flow of water.To empty tank i open the drain valve the water drains off ontill there is 30 millmeters of water left in the bottom of the tank.This is my zero point this helps with swing of the ball cock beccause it needs that amount of water in the tank before it rises.

__**IMPROVEMENTS**__

To make the rain guage a success and to be able to measure large amounts of rainfall the drain valve would have to operate automatically. The manual valve would have to be replaced by a solenoid,actuator so every time the tank hits the set point the drain would open and dumped the water.Every cycle would be then be counted