| The distance traveled can be measured by counting the revolutions of an impeller towed behind the vessel or mounted in its hull. |
| Rotation of the impeller draws liquid through the inlet cap opening and pushes the liquid through the pump flow path. |
| Offering four different models, these handheld digital instruments quickly and easily read wind speed via a sturdy impeller. |
| This type of humidifier has a rapidly rotating fan called an impeller, which turns water droplets into a fine mist. |
| The impeller on the water pump was just about gone and the bushing holding it to the shaft was cracked. |
| In the vaned impeller, the fluid undergoes an abrupt acceleration and change of direction as it enters the rotor. |
