Patent ID: 7258001
Filing Date: 2007-08-21
Classification: B67D

Abstract:
1. Ventilation-mast monitoring system for filling stations, having a thermal through-flow measuring device which has a heating device and a temperature sensor located in the flow path and reacting to the temperature of the heating device and which is configured to sense the gas volume flow which escapes from or enters into a reservoir tank of a filling station via a ventilation mast of the reservoir tank, and having a hydrocarbon measuring device which is configured to sense the direction of the gas volume flow which escapes from or enters into the reservoir tank via the ventilation mast, wherein the through-flow measuring device has a measuring dynamic of at least 2 l/min to 1200 l/min, and wherein to the through-flow measuring device there are assigned at least two measuring ranges which can be selected by predetermining a fixed temperature difference between the temperature of the temperature sensor and the ambient temperature, wherein the power which is respectively fed to the heating device is a measure of the through-flow to be measured.