Abstract: A ball float alarm emits a signal when a liquid rises above a predetermined level inside a sump. The alarm is activated by conditions related to the rising and falling of the liquid in the cavity. The alarm emits a signal when the liquid rises above the predetermined level, and then powers off when the liquid falls beneath the predetermined level. A buoyant sphere is supported by a cable from above the cavity. The alarm floats on the liquid when the liquid level is above a predetermined level. When the sphere floats, the cable is lax. The lax cable causes a magnet and an alarm contact inside the alarm to pivotally join, and thus actuate an alarm signal. When the liquid falls below the predetermined level in the cavity, the cable becomes lax, causing the alarm contact to pivot distally from the magnet, which shuts off the alarm.

Abstract: A ball float alarm emits a signal when a liquid rises above a predetermined level inside a sump. The alarm is activated by conditions related to the rising and falling of the liquid in the cavity. The alarm emits a signal when the liquid rises above the predetermined level, and then powers off when the liquid falls beneath the predetermined level. A buoyant sphere is supported by a cable from above the cavity. The alarm floats on the liquid when the liquid level is above a predetermined level. When the sphere floats, the cable is lax. The lax cable causes a magnet and an alarm contact inside the alarm to pivotally join, and thus actuate an alarm signal. When the liquid falls below the predetermined level in the cavity, the cable becomes lax, causing the alarm contact to pivot distally from the magnet, which shuts off the alarm.