Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1985-02-25
1987-01-27
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
210 85, 210739, 340540, 340627, 340679, G08B 2100
Patent
active
046397183
ABSTRACT:
A boiler blowdown monitoring system wherein the conductivity of the water in the boiler blowdown line is monitored to determine if it exceeds either a preset maximum or minimum level. The system includes a blowdown sensor, a blowdown valve, a blowdown controller and an interrogation means. The water conductivity is sensed by the sensor located on the blowdown line and transmitted to the interrogation means (e.g. microprocessor) through the boiler blowdown controller. If the sensor senses a water conductivity level above a preselected maximum conductivity level or below a preselected minimum conductivity level after a predetermined time period has passed since the boiler blowdown valve was opened, then an alarm signal is sent to the boiler operator.
REFERENCES:
patent: 4509618 (1985-04-01), Kuhn
patent: 4544489 (1985-10-01), Campbell et al.
Boiler Master System 1, Morr Control, Inc., Muskogee, Oklahoma 74401.
Model 250 Boiler TDS Control, Lakewood Instruments, Inc., Compton, CA 90220.
Boilermatic 300, Cambridge Scientific Industries, Cambridge, Maryland 21613.
O'Day Thomas P.
Olin Corporation
Simons William A.
Swann III Glen R.
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