Automatic Water Samplers

Automatic Water Samplers

Automatic water samplers are engineered to collect representative liquid samples on a programmed schedule or in response to process events. They are used when laboratory analysis is required, when regulatory programs demand composite sampling, or when transient conditions must be captured without constant onsite attendance. Systems may be installed as stationary units or deployed as mobile samplers for temporary monitoring campaigns across multiple sites.

Typical sampler architectures include a sampling intake, a pumping or suction mechanism, distribution hardware, and a sample container set (single bottle or multi-bottle carousel). Programming commonly supports time-paced and flow-paced strategies so that composite samples reflect actual loading instead of clock time alone. Product families include fully automatic samplers for water, wastewater, and industrial applications (e.g., Liquistation CSF48) as well as assemblies designed to extract samples from pressurized pipes where direct suction is impractical.

The main benefit is defensible, repeatable sampling with reduced labor and improved safety. Automated collection reduces the variability inherent in manual grabs, supports chain-of-custody practices, and enables event-driven sampling during storms, process changes, or permit-trigger conditions. By capturing conditions that occur outside normal staffing windows, samplers help close data gaps and improve root-cause investigations for excursions, odors, or downstream process impacts.

Common applications include municipal wastewater influent/effluent compliance, industrial pretreatment monitoring, combined sewer overflow programs, and stormwater outfall sampling. Surface-water programs use samplers to document upstream/downstream impacts, seasonal variability, and episodic contamination. In industrial plants, automatic sampling supports mass-balance studies, treatability testing inputs, and confirmation of discharge quality without disrupting operations or placing personnel in hazardous access areas.

Selection and installation focus on representativeness and sample preservation. Suction height, intake placement, line routing, purge/cleaning capability, and container material all influence sample quality and cross-contamination risk. Where preservation is required, refrigerated or cooled configurations protect analyte stability. Integration with flow meters, level sensors, and telemetry improves event capture and reduces manual coordination between sampling and lab workflows.

Field Instruments & Controls, Inc. an exclusive authorized representative of sales and service for Endress+Hauser.