We offer portable automatic water samplers for storm water, waste water, or other water-quality applications. These samplers use external vacuum pumps to draw water through intake tubing, instead of the traditional peristaltic pumps that induce flow by squeezing flexible tubing. Advantages of the vacuum pump method include faster sampling rates, better vertical lifts, longer sampling distances, and less maintenance. Because the vacuum method disturbs the water samples less, they better represent the original water solution, especially if the solution has high concentrations of suspended solids.
These automatic water samplers, made by Campbell Scientific, include a controller that can accept a pulse input (e.g., rain gauge), a 4 to 20 mA signal (e.g. flow meter), or initiate a sample on a timed basis. The samplers can also be interfaced with Campbell Scientific dataloggers. CSI dataloggers can measure nearly any turbidity, water level, or hydrometeorological sensor, as well as control the sampler based on time, event, or measured conditions.