Water Samplers / PVS4120D
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PVS4120D Portable Discrete Water Sampler
Most Lightweight
Vacuum technology for better samples
weather applications water applications energy applications gas flux & turbulence applications infrastructure applications soil applications

Overview

The PVS4120D is a lightweight, portable, battery-powered water sampler that deposits its water samples into 24 containers. It includes a programmable controller with 16-key intuitive touch pad. The controller 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 to measure a variety of sensors, as well as control the sampler based on time, event, or measured conditions.

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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Benefits and Features

  • Lightest discrete sampler offered by Campbell Scientific—weighing only 12 kg
  • Side handles for easy lifting (increases diameter)
  • Handcart available for easy transport
  • Stainless-steel suspension harness offered for sampling in sewer systems
  • Interfaces with Campbell Scientific dataloggers for more measurement and control capabilities

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Detailed Description

The PVS4120D 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, 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.

The pump in the PVS4120D is smaller than our larger models. The lightweight pump is able to take samples at over 5 ft/sec for horizontal draws of up to 25 ft.

The enclosure of the PVS4120D is a molded medium-density linear polyethylene, designed to handle tough environmental challenges and weathering. The hub has an insulated ring and a cavity for crushed ice, giving more control over the temperature of the samples.

Specifications

Enclosure Molded medium-density linear polyethylene, three-piece construction and stainless-steel fittings
Integral Battery 115 Vac/60 Hz or 12 Vdc
Cooling System Insulated container wall cavity space for ice
Body Case Diameter 42.8 cm (16.85 in.)
Height
  • 80.9 cm (31.875 in.)
  • 96.2 cm (37.875 in.) with extended base
Sampler Weight 10.4 kg (23 lb) without battery
Battery Weight 1.8 kg (4 lb)

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 250 cc
Horizontal Sample Transport Velocity
  • 1.2 m/s (4 ft/s) at 30.5 m (100 ft)
  • > 0.8 m/s (2.5 ft/s) at 67 m (220 ft)
Horizontal Sample Transport Maximum Distance 67 m (220 ft)
Metering Chamber Cover Nylon
Volume Control Tube 316 stainless steel
Metering Chamber Level Electrode 316 stainless steel
Discharge Hose Material Latex

Controller

Display 2 x 16 character backlit LCD
Touchpad 6 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
Switches Controller on/off (SPST toggle)
Available Displays Real time clock, Process timing, Process controls, Pulse counting, Event response, Multi-level description, Flashing prompts, Diagnostics
Automatic Displays Container Full, Fault, Power Interrupt (program resumed), Alternating Time Stamp, Cycle(s) abandoned

Compatibility

Controller

The PVS4120D includes a programmable controller with 16-key intuitive touch pad. The controller 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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