Automatic Portable Liquid Samplers

Model: PVS-C; Portable Composite  

Model: PVS-D; Portable Discrete      

Operation

Southwell’s Sirco brand portable samplers incorporate our patented vacuum/compressor sampling system.  Sample fluid travel is limited to the intake hose, metering chamber and discharge hose, eliminating sources of cross-sample contamination such as pumps, valves and distribution plates.  Repeatable sample volumes are obtained by accurate volumetric measurement of each sample, while rapid transport velocities ensure representative concentrations of solids in the sample fluid.

 

Rapid Sample Transport Velocities

The Southwell sampling system maintains sample transport velocities through a 3/8” ID intake hose in excess of 3 ft/s for sample lifts up to 20 ft.   This important feature allows representative sampling of solids over high lifts without the precipitation problems associated with lower transport velocity samplers.

 

Sampler Controller

The multifunction controller is designed for versatility and simplicity.  Housed in an environmentally sealed enclosure for corrosion protection, the microprocessor based controller is progammable via a 16 position keypad.   All information is viewed on a 2x16 character LCD display which guides the operator through programming sequences with easily understood directions.   In the event of a power failure, all program settings and information stored in the controller are maintained by an internal lithium battery.

Sampling Sequence

Sample collection begins with a high pressure air purge of the intake assembly to remove residual liquid and obstructions.  Upon completion of the pre-purge cycle, the system converts to a vacuum state, drawing the sample through the intake hose, into the metering chamber until contact is made with the adjustable level sensor.  The system then pressurizes, ejecting excess fluid back through the intake line until the predetermined sample volume is achieved.  If the sampler, for any reason, is unable to draw a sufficient volume of fluid to obtain a sample, the operator may program the unit to automatically initiate a second attempt.  Should a sample not be delivered after a second attempt, the sampler shall abort the sequence and await the next sample initiation signal.   Upon two consecutive failures the sampler will suspend the sampling program until manually reset and provide a sample fault indication.

Sampler Controller

The multifunction controller is designed for versatility and simplicity.  Housed in an environmentally sealed enclosure for corrosion protection, the microprocessor based controller is programmable via a 16 position keypad.   All information is viewed on a 2 x 16 character LCD backlit display which guides the operator through programming sequences with easily understood directions.  In the event of power failure, all program settings and information stored in the controller are maintained by an internal lithium battery.

Rapid Sample Transport Velocities

Southwell’s patented system maintains sample transport velocities through a 3/8” ID intake hose in excess of 3 ft/s for sample lifts up to 20 ft.  This important feature allows representative sampling of large particles (unaltered or deformed) and suspended solids over high lifts without the precipitation problems associated with lower transport velocity samplers.  A 5/8” ID intake system is also available for collection of even larger particles and reduced risk of intake line fouling. This larger system maintains transport velocities in excess of 3 ft/s for sample lifts up to 16 ft.

Design Specifications for PVS Series Portable Liquid Samplers