HYDROLOGICAL RECORDER

摘要

Data processing and recording apparatus for use in receiving and recording hydrological information. There is provided a sensor means and a punching system to perforate paper tape at predeterminable time intervals in accordance with stimuli received from the sensor means. The sensor means has a pressure sensitive device located where hydrological information is sought. A detector translates pressure changes in the pressure sensitive device into electrical impulses to operate the punching system. The pressure sensitive device has an open ended tube through which a gas is forced from a supply vessel. The gas pressure is increased until gas bubbles pass from the open end of the tube at a predeterminable rate and a well-type mercury manometer is connected to the pressure sensitive device in an air-tight manner.