A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 23
ater or Liquid Level A device for electrically sounding an alarmwhen a water surface varies materially froma given level. An electric bell is placed in a circuit that is au-tomatically closed or broken by the movement ofcontact-points operated by the change of liquidlevel. A form of electric alarm… … ^i,ff,,.v:,;.,:.,v.:» Fig. Q. Water-Level Alarm
Electricity · Electrical engineering
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