Vacuum technology for better samples
Overview
The BVS4300D is a discrete sampler that places each sample into a separate container. This stationary water sampler is designed for outdoor use. It is housed in a protective steel enclosure to resist harsh conditions. 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.
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
Benefits and Features
- Rapid transport velocities of samples, meaning more accurate samples—even of solids
- All information easily controlled and viewable on a 2 by 16 character backlit LCD
- Optional glass-door fridge and optional heater
- Interfaces with Campbell Scientific data loggers for more measurement and control capabilities
Images
Detailed Description
The BVS4300D is an outdoor stationary water sampler that deposits its water samples into several containers. This sampler is designed to handle extreme environments. It has a corrosion-resistant steel enclosure with a locking door and bolted-down instrument panel.
The BVS4300D 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 BVS4300D 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
| Specialized Applications | Outdoor, refrigerated |
| 5/8 Inch ID Tubing Compatible | Yes |
| Sample Container |
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| Cabinet | NEMA3R |
| Dimensions | 1.6 x 0.66 x 0.66 m (63 x 26 x 26 in.) |
| Weight with Refrigerator | 141 kg (310 lb) |
| Weight without Refrigerator | 109 kg (240 lb) |
Supply Voltage |
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| Sampling System | 115 Vac/60 Hz or 12 Vdc |
| Refrigeration and Heating Units | 115 Vac/60 Hz |
Vacuum System |
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| 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 |
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| Horizontal Sample Transport Velocity |
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| 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 |
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| 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 |
| 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 |
Compatibility
The controller that comes with the BVS4300D can accept a pulse input (such as from a rain gage) or a 4 to 20 mA signal (such as from a flow meter), or it can initiate a sample on a timed basis. The sampler can also be interfaced with our data loggers. Our data loggers can measure nearly any turbidity, water level, or hydrometeorological sensor, as well as control the sampler based on time, event, or measured conditions.
