Water Samplers / CVS4200D
CVS4200D Indoor Stationary Discrete Water Sampler
Accurate, Reliable
Vacuum technology for better samples
weather applications water applications energy applications gas flux & turbulence applications infrastructure applications soil applications

Overview

The CVS4200D is a discrete, stationary water sampler designed for indoor use. Each sample is placed into a separate container. The sampler uses reliable, long-lasting, vacuum technology. This sampling method results in faster sample draws and less disturbance of the sample contents. There is also less wear on the tubing, resulting in less frequent maintenance. The CVS4200C differs from the CVS4200D in that it is a composite sampler, with all samples combining into a single container. 

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
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Detailed Description

The CVS4200D is an indoor stationary water sampler that deposits its water samples into several containers. It 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 CVS4200D 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

Enclosure Nema 1 general purpose, 14 gage steel enclosure (upper control section only) with polyester-based powder paint for corrosion resistance
Dimensions
  • 1.45 x 0.61 x 0.61 m (4.75 x 2 x 2 ft) with refrigerator
  • 0.59 x 0.43 x 0.48 m (1.92 x 1.42 x 1.65 ft) without refrigerator
Weight with Refrigerator 91 kg (200 lb)
Weight without Refrigerator 32 kg (70 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 1 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

Controller

Display 2 x 16 character backlit LCD
Touchpad 16 key (with multi-level menu)
Start Delay Disabled, Time/Day, Pulse Count, 4 to 20 mA (0 to 100 pulses/min.), External Contact, Level Control
Sample Initiation Disabled, Time/Day, Pulse Count, 4 to 20 mA (0 to 100 pulses/min.), External Contact, Level Control
Program Type Composite, Multi-Composite, Consecutive, Daily Cycle, Timed Step
Clock Real-time clock and operating system
Direct Function Keys Manual sample, Manual purge, Manual bottle advance, Restart
Alarm Outputs (Independent) Cycle abandoned (pulse output), Sample Fault, Container Full
Status Outputs Sample taken (pulse output)
Switches Run/off (SPST toggle), On/off (5 A lighted breaker); Heater on/off; Refrigerator on/off
Available Displays Real time clock, Process timing, Process controls, Pulse counting, Event response, Multi-level description, Flashing prompts, Diagnostics
Automatic Displays Container Full, Fault Interrupt Alternating Time Stamp, Cycle(s) abandoned

Compatibility

The controller that comes with the CVS4200D 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.

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