Automatic Water Samplers

Automatic Water Samplers

Automatic water samplers are electromechanical systems that collect discrete or composite samples from water and wastewater streams according to defined programs. They are used when defensible sampling is required for permits, compliance reporting, process verification, or source identification, and when sample integrity must be protected from handling variability. By executing sampling routines consistently, they support higher confidence in laboratory results and trend analysis.

Modern samplers cover stationary and portable use cases and are applied across stormwater, surface water, river and well monitoring, watershed programs, sewer system monitoring, and industrial and municipal wastewater sampling. Sampling can be structured as time-controlled composite collection with defined intervals and volumes, enabling representative averages over a reporting period and reducing the risk of bias from “best-time” manual collection.

Beyond basic time programs, automatic samplers can be configured for flow-proportional sampling by receiving external signals (for example, from a flowmeter) so collection frequency scales with loading. They can also support event-triggered sampling when paired with analytical sensors, capturing transient excursions that would otherwise be missed and creating defensible evidence of peak loads or abnormal discharges.

Sample preservation is a critical differentiator in many deployments. Stationary sampling stations may include cooling designed to maintain composite sample integrity over extended periods and can be configured to meet common regulatory expectations. Robust housings and field-ready mechanical design support unattended operation in exposed locations, including remote monitoring sites and municipal infrastructure.

From an architecture standpoint, automatic samplers can serve as the backbone of a compact monitoring station by incorporating transmitter functionality and supporting integration of additional sensors (such as pH, conductivity, oxygen, turbidity, and more). This enables coordinated measurement-and-sampling strategies - linking a triggered sample bottle to a documented analytical event - while keeping the physical and signal interfaces consolidated.

At Eastern Controls, We are proud to be the exclusive authorized sales and service representative for Endress+Hauser.