The WS700R Refrigerated Wastewater Sampler's state of the art water sampler controller gives you complete control over your water sampling process.  With the water sample size control, you can take individual time-weighted composite samples or full-bottle discrete grab samples in a 2 gallon sample bottle.  The water sample interval control allows you set the time between individual refrigerated composite samples or enable the external trigger mode for flow proportional sampling.  A start delay timer allows you to start multiple refrigerated water samplers in the field at the same time, or to delay drawing a water sample after a triggering event so that your water sample better represents the water source.  An automatic 15 second backflush cycle clears any debris from the strainer and empties the water from the hose so the next refrigerated composite sample is not contaminated.

The WS700R Refrigerated Wastewater Samplers are easy to set up in the field.  The refrigerated wastewater sampler requires two 120 V outlets to power the peristaltic pump and refrigerator.  The refrigerated wastewater samplers are relatively small and can be easily hidden or protected inside of a fiberglass enclosure.

The WS700R Refrigerated Wastewater Samplers come with a 2.5-gallon polyethylene sample bottle for collecting refrigerated composite samples, a peristaltic sampling pump, a circuit board controller, and a rechargeable gel cell battery.  Also provided is a sample pickup hose and a battery charger.  Everything you need is provided for a successful wastewater management or environmental monitoring program.

Overflow Protection
The refrigerated wastewater sampler's sample bottle is equipped with a float switch that automatically turns off the peristaltic sampling pump if the water bottle becomes full.

Sample Size
The user can adjust the refrigerated wastewater sampler's sample size to one of 15 composite sample sizes from 50ml to 2 liters plus a full bottle discrete setting and the refrigerated wastewater sampler's sample interval to one of 15 time settings from 5 min. to 12 hours plus an external trigger mode setting for flow proportional sampling.

Flow Proportional Sampling
An external pulse-type flow meter can control the water sample interval for true flow proportional sampling.  Global Water's Open Channel Flow Monitor has a flow-proportional output signal for triggering the WS700R refrigerated wastewater samplers.  If you already have a flow meter but it has a 4-20mA output.

Refrigerated Wastewater Samplers Specifications

Operating Temperature: 0° to +70°C
Size of unit: 27"H X 20"W X 20"D
Weight: 40lb (Shipping Weight 42lb)
Materials:
     Enclosure: Expanded UV protected PVC
     Bottle: 2.5 gallon Polyethylene
     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
Power: Internal 12V Rechargable Battery with AC 120 VAC adapter/charger
     Standby: 3 months while still retaining enough power to run the pump to capacity
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 50ml to 2 liters plus a Full Bottle discrete setting (Approximate sizes at 4 foot head)
External Trigger Input: 250mS minimum pulse width
     Switch closure or 4-24VDC
Pulse Output: 5VDC one-second pulse
     1000ohm output impedance
Bottle Switch Input: Switch closure Input
     Floating read switch in bottle
Rain and Water Sensors: Optional moisture sensors or switch closure inputs
Internal Fuse: 10A Slow-Blow