WS Series Auto Samplers
WS Series Auto Samplers

YSI's WS700 single- and WS750 dual-bottle samplers combine all the features you need to meet various sampling requirements, including those for Stormwater, rivers and streams, industrial discharge, water and wastewater treatment, and wastewater collection.
If your samples need to be refrigerated, the WS700R model is ideal. It provides the same sampling functions and needs but with the added benefit of refrigerating your sample.
YSI's WS705 and WS755 models provide the exact same functionality but come with enhanced portability accessories, such as more ergonomic handles and durable wheels.
All WS Series Water Samplers Include:
- 15' of sampling hose
- intake strainer for each pump
- Sampler Float Switch
- 1-gallon polybottle for each pump (WS750, WS755)
- 2.5-gallon polybottle for each pump (WS700, WS705)
- Rechargeable Battery
- Rechargeable Charger
Sample Size
User can adjust the wastewater/stormwater sampler's peristaltic pumps individually to one of 15 composite sample sizes from 50ml to 2 liters plus a full bottle discrete setting. The wastewater/stormwater sampler's peristaltic pumps can be set to a single sample time interval from 5 minutes to 12 hours plus an external trigger mode setting for flow proportional sampling.
Collection Control
Trigger inputs to control sample collection. The sample bottles are each equipped with a float switch that automatically turns off the peristaltic sampling pump if the water bottle becomes full.
Two-In-One
Does composite or discrete sampling or both simultaneously (WS750 & WS755)
Automatic Backflush
Automatic Backflush clears pickup strainer and hose.
Low Power
The composite/discrete water sampler's 5 AH rechargeable battery will power it for several months or a half hour of continuous sampling with both pumps. The units can also be plugged into an external battery source.
Range of Features and Options
WS Series of samplers has the functionality to add additional data logger options, sensors, and pumps for more ease of use, for example:
- Sampler Rain Sensor
- BC100 Smart Battery Charger
Specifications
| Sampler Selection Chart | WS700 | WS705 | WS750 | WS755 | WS700R |
|---|---|---|---|---|---|
| Time or Flow Weighted Sampling | Yes | Yes | Yes | Yes | Yes |
| Rugged Enclosure | Yes | Yes | Yes | Yes | Yes |
| Outputs for Data Loggers and Sensors | Yes | Yes | Yes | Yes | Yes |
| 1 Pump | Yes | Yes | Yes | ||
| 2 Pump | Yes | Yes | |||
| Composite OR Discrete Sampling | Yes | Yes | Yes | ||
| Composite AND Discrete Sampling | Yes | Yes | |||
| Enhanced Portability | Yes | Yes | |||
| Refrigerated | Yes |
| WS Series Specifications | |
|---|---|
| Operating Temperature | 0° to +70°C |
| Materials | Enclosure: Expanded UV protected PVC Bottle: 2.5 gallon Polyethylene (WS700, WS705 & WS700R), two 1-gallon Polyethylene (WS750 & WS755). Pickup Hose: 15' reinforced PVC 1/4" ID polyethylene flexible tubing section with intake strainer. Pump Tubing: Norprene 1/4" ID, 7/16" OD |
| Sample Pump | Flow Rate: 1000 ml per minute at a 4 foot head Type: Peristaltic Maximum Lift: ~20 feet |
| Battery | Rechargeable 5 AH Gel Cell |
| Battery Life | WS700 & WS705: ~1 hour continuous pumping under load WS750 & WS755: ~1/2 hour continuous pumping under load Standby: 3 months while still retaining enough power to run the pump to capacity is required. |
| Start Delay | 16 time settings from 0 to 12 hours |
| Composite Interval | 15 time settings from 5 min. to 12 hours plus an external trigger mode setting. |
| Sample Size | 15 composite sample sizes from 50 ml to 2 liters plus a full bottle discrete setting (approximate sizes at 4 foot head) |
| External Trigger Input(s) | 250 mS minimum pulse width switch closure or 4 to 24 VDC |
| Pulse Output(s) | 5 VDC one-second pulse, 1000 ohm output impedance |
| Bottle Switch Input(s) | Switch closure input, float switch in bottle |
| Rain and Water Sensors | Optional moisture sensors or switch closure inputs |
| Internal Fuse | 10A Slow-Blow |
| Certificates | CE Compliance |
| Dimensions | WS700, WS705, WS750, WS755: 22"H x 17"W x 9"D (56 x 43 x 23 cm) |
| Weight | WS700 & WS705: 20 lbs/9 kg (shipping weight 22 lbs/10 kg) WS750 & WS755: 22 lbs/10 kg (shipping weight 24 lbs/11 kg) |
Accessories
- 20-Mesh Pickup Strainer Assembly
- Tubing, Standard Sampler Pump
- BC100 Smart Battery Charger
- Sampler Rain Sensor
- Tubing, Sampler, Pick up 1/4" ID, Clear
- Sampler Battery Cable
- Sampler Float Switch, 1 Gallon
- 1 Gallon Plastic Container
- XFRMR-AC/DC Wall Mount 18VDC 330mA