The YSI ProSample P is a portable, battery-operated automated water sampler with a peristaltic pump and microprocessor control — ideal for discrete and composite sampling in stormwater, wastewater, and surface water monitoring programs. The P-12 variant adds SDI-12 connectivity for direct integration with EXO sondes and other telemetry devices.

Every unit ships with a 12V/7.5Ah battery, two peristaltic pump tubes, USB cable, Getting Started Guide, and a 5-meter suction hose with screw connection and sinker weight. Battery charger not included — order separately below or see the Chargers & Power section. Sample bottle sets with distributor arm are also sold separately.

The Composite Kit variants include the ProSample P, a 26L PE composite bottle, a CEC-compliant battery charger, and a strainer — everything needed to start collecting composite samples immediately. The Discrete Kit variant adds 24×1L bottles and a distributor arm for discrete sampling programs.

Need cables, replacement parts, or accessories? Browse our Discrete & Composite Samplers collection.