Device for measuring surface water in vertical inspection manhole of sewage, has micrometer drum including weight-dependently working locking unit for recurrently fixing measurement chambers in position suitable for water absorption

摘要

The device has an upper sealing plate (5) provided with a passage opening (6), and a lower measuring unit (7) for determining flow rate of surface water. The measuring unit includes a micrometer drum with measurement chambers for receiving and discharging predetermined water amount, where the micrometer drum is rotatable in a synchronized manner. A meter records a measured variable that characterizes the received water amount. The micrometer drum includes a weight-dependently working locking unit for recurrently fixing the chambers in a position suitable for water absorption.