Attenuation Factor

Finding Attenuation Factor

Procedure

We followed the procedure for finding attenuation factor found on the Flow Controller Theory page. The set up consisted of a stock tank of water, a peristaltic pump, a constant head tank (using the desired float valve), a 200 kPa sensor and a 7 kPa sensor. The change in the stock tank was controlled by the peristaltic pump, which pumped water through the float valve. The 200 kPa sensor was attached to the inlet at the float valve and the 7 kPa sensor was attached to the outlet (either open or not open).

Results

Conclusion

The attenuation factor of the new float valve with an outflow is low and leads to an error of approximately 2.5 mm. This is an acceptable error for use in Honduras, however a valve with a greater surface area would be preferred.