Collection of process effluent

摘要

Described herein is an alarm system for use with a 'bag-in-box' arrangement (10) which is used to collect effluent from a processing apparatus (20). The alarm system comprises a chamber (50) located between the processing apparatus (20) and the 'bag-in-box' arrangement (10) which includes a level sensor (52) which indicates that the 'bag-in-box' arrangement (10) has been overfilled by a predetermined amount and is ready for changing.