| 摘要 |
<p>A flowmeter has a housing (1). Inside the housing are arranged a measuring rotor (23) with markings (33) and an optic scanner (28), producing scanning signals in dependence of the detected markings (33). A transparent separating wall (31, 32) is arranged between measuring rotor (23) and scanner (28). On the side of the separating wall (31, 32) facing the measuring rotor (23) is arranged a cleaning device with at least one cleaning element (40, 41), the cleaning element and the separating wall being displaceable in relation to each other. This ensures that the flowmeter can be operated for a longer period with a lower power.</p> |
