Control valve position. Pressure for dry pipe sprinkler systems, pressure tanks or steam-operated equipment. Water level for gravity, pressure or section tanks. Water temperature for exposed water-storage tanks. Guard's tour of stations.
Automatic fire pump running signal and power supply.
Trained personnel monitor signals at an alarm panel. Usually, very large corporations prefer this. A third type of fire alarm system, a local signaling system, only sets off an alarm internally to get occupants out of the building. Operated by on-site personnel, it has little property protection value unless signals are promptly received and acted upon by someone in constant attendance. Three major points are helpful to remember when choosing fire protection.