This product is no longer available. Some accessories, replacement parts, or services may still be available.
PVS5120 Composite Portable Automatic Liquid Sampler
Services Available
Repair Yes
Calibration No
Free Support Yes


The PVS5120C is a composite sampler that deposits its water samples into a nine-liter container. This sampler uses a vacuum sampler controller, the VSC100, to allow a Modbus RTU master, SDI-12 master device, simple pulse input, or Campbell Scientific PakBus data logger to control and communicate with the water sampler.

This sampler is lightweight, portable, and battery-powered. It can fit in a small-sized manhole and be suspended by a stainless-steel harness for sewer applications. 

The PVS5120C can be used with a standard or large pump. The standard pump takes samples at 1.6 m/s (5.1 ft/s) for horizontal draws of 7.6 m (25 ft). The large pump takes samples at 2.2 m/s (7.1 ft/s) at 7.6 m (25 ft). Both of these velocities are typical values measured at sea level. Intake velocities will decrease as altitude increases. 

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Benefits and Features

  • Diagnostic feedback provided to the master device: bottle number, sample number, response code/message, sampler battery voltage
  • Auto deploy that automatically sets the purge and vacuum times based on hose length
  • Repeatable volume collection via metering chamber
  • Selectable internal or external power via three-way power switch
  • One control cable for all control types
  • An optional water present sensor detects the presence of water at the mouth of the sampler intake hose to ensure a sample is available


Detailed Description

The PVS5120C uses an external vacuum pump to draw water through intake tubing, instead of the traditional peristaltic pump that induces flow by squeezing flexible tubing. Because the vacuum method disturbs the water samples less, they better represent the original water solution, especially if the solution has high concentrations of supsended solids. 

To prevent cross contamination, the sampler uses air pressure (up to 28 psi) to purge the tubing of excess water. The standard pump can lift as high as the large pump and is appropriate for most applications─especially when the power budget is a concern. The large pump is appropriate for applications with long hose distances or high lifts because it provides higher pumping velocity. 


Specialized Applications Fits in small-sized manholes. Can be suspended by stainless-steel harness for sewer applications.
5/8 Inch ID Tubing Compatible Yes
Sample Container One 9 L bottle
Enclosure LLDPE (linear low-density polyethylene), three-piece construction, and stainless-steel fittings
Cooling System Insulated container wall, cavity space for ice
Horizontal Velocity Refer to the "PVS5120 Intake Velocity versus Hose Length at Sea Level" plot.
Storage Temperature Range -20° to +50°C
Operating Temperature Range
  • 0 to 40°C (large pump)
  • 0 to 50°C (standard pump)
Operating Voltage
  • 12 Vdc (nominal)
  • 16 Vdc (maximum)
  • 10.8 Vdc (minimum)
Body Case Diameter 42.8 cm (16.85 in.)
  • 80.9 cm (31.875 in.)
  • 96.2 cm (37.875 in.) with extended base


Sampler with Standard Pump and No Battery 10.4 kg (23 lb)
Sampler with Large Pump and No Battery 11.8 kg (26 lb)
7 Ah Battery 1.8 kg (4 lb)
17 Ah Battery 6.3 kg (14 lb)


Sampler Triggering Methods
  • SDI-12 Master Device
  • Modbus RTU Master
  • Campbell Scientific PakBus data logger
  • Pulse trigger (1 to 10,000 pulses)
  • Time-based sampling (stand alone)
RS-485 Communication Can return sampler status when triggering samples via pulse or time-based control.
Backup Power Source Internal lithium battery maintains program settings and information in case of power failure.
Multi-purpose Button Service sampler, collect manual sample, and auto deploy
Auto Deploy Automatically sets the purge and vacuum times based on hose length (between 25 and 100 ft)
Sampler Status/Feedback Bottle number, sample number, response code, sampler battery voltage (available after every sample)

Vacuum System

Pinch Valve Fixed – normally open
Purge Cycle Adjustable from 1 to 800 s (280 s for SDI-12)
Suction Cycle Variable (until liquid contacts level electrode in metering chamber or adjusts automatically to two times the purge time)
Horizontal Maximum Transport Distance 67 m (220 ft)
Metering Chamber Cover
  • Nylon (standard)
  • Teflon (option)
Volume Control Tube 316 stainless steel
Metering Chamber Level Electrode 316 stainless steel
Intake Hose Ordered as a common accessory. Campbell Scientific offers PVC hose with 25-ft and user-specified lengths. Intake end can have a lead sinker or stainless-steel strainer. Sampler end can have a clamp or quick-connect termination.
Discharge Hose Material
  • Latex (standard)
  • Options include Teflon lined, silicon.


The PVS5120C can interface with Campbell Scientific data loggers or RTUs from other manufacturers. 

Our data loggers can interface and communicate with nearly any turbidity, water level, or hydrometeorologic sensor, as well as control the sampler based on time, event, or measured conditions.


PVS5120 Sample Programs (5.79 KB) 08-10-2014

Example CR1000 programs for triggering a PVS5120 that has been configured to run on SDI12 commands, PakBus commands or ModBus commands.

VSC100 OS v.7.0 (478 KB) 07-07-2015

VSC100 Operating System.

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