An alarm capable of determining the flow time remaining of irrigation fluid is disclosed. It is also contemplated that the device can detect a partial or complete blockage in the system or empty fluid bag and alert medical personnel locally or remotely as required. The device is capable of calculating the time remaining before the CBI irrigation fluid in the irrigation fluid bag reaches a pre-set level that necessitates changing the bag or the actual time of day or night when the irrigation will be approaching the critical level. Additionally, the user can be alerted to the CBI irrigation fluid in the irrigation fluid bag reaching a pre-set level that necessitates changing the bag before the fluid level becomes critical.