Aqua Monitor is a highly programmable sampler that uses a precision syringe pump to collect up to 47 discrete water samples. It is commonly used to be operated in autonomous time-series sampling mode as a 'slave' within an integrated system. It samples for nutrients, phytoplankton, suspended-load, tracers, and contaminants. The sampler can be deployed long-term on moorings or in short-term (AUV) deployments.