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:
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.
|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.)|
|Sampler Weight||10.4 kg (23 lb) without battery|
|Battery Weight||1.8 kg (4 lb)|
|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||
|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|
|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|
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.