Global Water Instrumentation, Inc. - a Xylem brand

Model WS750 - Wastewater/Stormwater Sampler



Our new WS750 two-bottle wastewater/stormwater samplers combine all the features you need to meet a wide variety of sampling requirements, including those for stormwater, industrial discharge, water and wastewater treatment, waste collection systems, and rivers and streams.

The WS750 wastewater/stormwater sampler's state of the art controller gives you complete control over your wastewater/stormwater sampling process. With the wastewater/stormwater sampler's sample size control, you can take individual time-weighted composite samples or full-bottle discrete grab samples. The wastewater/stormwater sampler's sample interval control allows you set the time between individual composite samples or enable the external trigger mode. A start delay timer allows you to start multiple wastewater/stormwater samplers in the field at the same time, or to delay drawing a wastewater/stormwater sample after a triggering event so that your sample better represents the water source. An automatic15 second backflush cycle clears any debris from the wastewater/stormwater sampler's strainer and empties the water from the hose so the next sample is not contaminated.

A unique feature of the WS750 stormwater/wastewater samplers is the ability to set the sampling mode for each pump and bottle individually. This allows you to take two individual time-weighted or flow proportional composite samples, or you can set the stormwater/wastewater samplers to take full-bottle discrete (grab) samples, or you can set the stormwater/wastewater samplers to take a full-bottle discrete (grab) sample in one bottle and a time-weighted or flow proportional composite sample in the other. In the case of two composite samples you can have different size settings for each pump.

The WS750 stormwater/wastewater samplers are easy to set up in the field. The stormwater/wastewater samplers rugged rainproof enclosure can be padlocked and/or chained to prevent tampering. The stormwater/wastewater samplers are enclosed in a relatively small case that can be easily hidden or camouflaged to prevent vandalism. The stormwater/wastewater sampler's is lightweight enough that even with a full sample bottle it can be suspended in a manhole for stormdrain or sewer sampling.

The WS750 wastewater/stormwater samplers come with two 1-gallon polyethylene sample bottles for collecting composite samples, two peristaltic sampling pump, a circuit board controller, and a rechargeable gel cell battery. Also provided are two sample pickup hoses and a battery charger. Everything you need is provided for a successful wastewater management or environmental monitoring program.

Low Power
The composite/discrete water sampler's 5 AH rechargeable battery will power the sampler for several months or a half hour of continous sampling with both pumps.

Overflow Protection
The wastewater/stormwater sampler's sample bottles are each 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 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.

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 WS750 wastewater/stormwater samplers. If you already have a flow meter but it has a 4-20mA output, please look at the related products section of the Wastewater/Stormwater Samplers Options & Prices section

Remote Water Sampling Notification
Attach the AD200 Autodialer or CVD-2000P Cellular Autodialer to your wastewater/stormwater sampler to add remote sample notification. This accessory will save you travel time by ensuring that you always know when your wastewater/stormwater water samplers have taken a sample at your monitoring sites.

  • Ideal for wastewater, industrial and environmental sampling
  • CE Certified
  • Does composite, discrete or both types of sampling
  • Simple to operate – no programming required
  • Output provided for use with optional datalogger
  • Lightweight and easy to carry
  • Rugged construction for harsh environments
  • Meets federal, state and local wastewater regulations
  • Timed and external flow proportional sampling
  • Adjustable and repeatable sample volume
  • Peristaltic pump prevents sample contamination
  • Automatic backflush clears pickup strainer and hose
  • Rechargeable battery or AC powered
  • The easiest and most reliable method for collecting water quality samples

  • Operating Temperature: 32° to +158°F (0° to +70°C)
  • Materials:
    • Enclosure: Expanded UV protected PVC
    • Bottles: Two 1 gallon Polyethylene
    • Pickup Hose: 15 ft 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:
    • One Pump running: ~1 hour Two Pumps running: ~ ½ hour
    • 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 4-30VDC
  • 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
  • Size of unit: 22x17x9 inch (56x43x23 cm) (HxWxD)
  • Weight: 22 lb (10 kg) (Shipping Weight 24 lb (11 kg))

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