Benefits and Features Vacuum technology benefits over peristaltic pump samplers: Accurate sample volumes Rapid transport velocities mean more-representative samples Less disturbance of sample Minimal wear on the tubing, resulting in less-frequent maintenance Reduced cross-sample contamination Detailed Description The BVS4300D is an outdoor stationary water sampler that deposits its water samples into several containers. This sampler is designed to handle extreme environments. It has a corrosion-resistant steel enclosure with a locking door and bolted-down instrument panel. The BVS4300D uses an external vacuum pump to draw water through intake tubing, instead of the traditional peristaltic pump 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. To prevent cross contamination, the sampler use air pressure (up to 28 psi) to purge the tubing of excess water. The controller that comes with the BVS4300D can accept a pulse input (e.g., rain gage), a 4 to 20 mA signal (e.g. flow meter), or initiate a sample on a timed basis. The sampler can also be interfaced with our dataloggers. Our dataloggers can measure nearly any turbidity, water level, or hydrometeorological sensor, as well as control the sampler based on time, event, or measured conditions. Specifications General Dimensions 1.6 x 0.66 x 0.66 m (63 x 26 x 26 in.) Weight with Refrigerator 141 kg (310 lb) Weight without Refrigerator 109 kg (240 lb) Supply Voltage Sampling System 115 Vac/60 Hz or 12 Vdc Refrigeration and Heating Units 115 Vac/60 Hz Vacuum System Pinch Valve Fixed – normally open Purge Cycle Adjustable from 5 to 99 s Suction Cycle Variable (Adjusts automatically to double the input value of the purge time setting or until liquid contacts level electrode in metering chamber.) Sample Volume Adjustable, 50 to 500 cc or Adjustable, 500 to 1000 cc Horizontal Sample Transport Velocity 2.2 m/s (7.1 ft/s) at 7.6 m (25 ft) 1.5 m/s (5 ft/s) at 30.5 m (100 ft) 0.8 m/s (2.6 ft/s) at 76.2 m (250 ft) Horizontal Maximum Transport Distance 76.2 m (250 ft) Metering Chamber Cover Nylon Volume Control Tube 316 stainless steel Metering Chamber Level Electrode 316 stainless steel Intake Hose Material Nylon-reinforced PVC Discharge Hose Material Latex
