Abstract: A counter apparatus for counting the cycling of fluid flow in an automatic pneumatic pump. A magnet inside the pump repetitively moves along a fixed path in response to the pump cycling. A magnetic sensor for detecting magnetic flux is mounted on the pump. The sensor transmits an electrical signal to a counter in response to detecting the magnet at a certain location. When the magnet leaves this location the sensor stops transmitting the signal. Since the magnet is only at any location along the path only once during a complete pump cycle, the transmitted signal represents a pump cycle which is then counted by the counter.
Type:
Grant
Filed:
October 24, 1994
Date of Patent:
August 27, 1996
Assignee:
QED Enviromental Systems, Inc.
Inventors:
Richard D. Johnson, Robert M. Bultman, Kevin L. Newcomer