Abstract: An inexpensive, audible alarm to alert the surgeon when the level of Basic Salt Solution (BSS) falls dangerously low during a cataract surgical procedure. A digital weight gauge is suspended from the BSS pole of the phacoemulsification unit. The BSS bottle is suspended from the weight gauge. As the BSS leaves the bottle, the weight of the bottle decreases. When the digital weight gauge reaches a predefined minimum weight, an audible alarm is activated. The alarm may be provided with an on/off switch so that the alarm may be deactivated when it is not in use. The weight gauge may also have a programmable setting to adjust to the surgeon's preference for timing of notification.