Specifications Water Samplerv2_AUG2020.pdf

Quantity of three (3) full size portable water samplers that must have the following features:

1. A vacuum-formed ABS plastic shell to withstand exposure and abuse.

2. A tapered design and trim 20-inch (50.8 cm) diameter should result in easy manhole installation and removal.

3. Large, comfortable handles should make transporting safe and convenient.

4. The enclosure should be submersible, watertight, and dust tight. The controller should allow you to select different programming modes to assure the most suitable routine for your application.

5. Programming should be fast and simple.

6. In Standard Programming Mode, the controllers should walk you through the sampling sequence step-by-step, allowing you to choose all parameters specific to your application.

7. Extended Programming Mode should let you enter more complex programs including “smart sampling” event notification, triggered on any combination of up to 16 inputs.

8. Single Bottle Configuration that allows one 2.5-gal Poly Bottle per sampler

Quantity of (3) area velocity (AV) flow modules must have the following features:

1. AV modules fully compatible with full size water samplers.

2. Water flow-sensing technology: Continuous-wave Doppler technology to measure mean velocity.

3. The sensors should transmit a continuous ultrasonic wave, then measure the frequency shift of returned echoes reflected by air bubbles or particles in the flow.

4. The AV probes should be built on digital electronics, so that the analog level is digitized in the sensor itself to overcome electromagnetic interference.

5. The probes should be factory-calibrated for a 10-foot (3 meter) span at different temperatures.

6. This built-in calibration should eliminate drift in the level signal, providing long-term level stability that reduces recalibration frequency and completely eliminates span recalibration.

7. In the field, the AV modules should be powered either by two alkaline, or Rechargeable

Lead- acid batteries, and/or other power options (including solar).

Quantity of three (3) AV Module Sensors with 25’foot cables compatible with the AV module (see above).

Quantity of (3) 6’foot Power Cable for use with external 12 VDC Power source to power sampler and AV module (see above).

Quantity of three (3) scissor-ring inserts that must have the following features:

1. Made of stainless-steel.

2. Allow easy adjustment to fit 16-23” inch diameter pipes.

3. Able to easily accept the AV module sensors and water sampler sampling tubes.

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