INW Successes


South Bend Sewer System

How Good Data Made an Entire City Cleaner

Many of the world’s older sewers, especially those in the Eastern and Midwestern US, suffer from overflows. These can be dangerous and very expensive for cities to investigate and fix. INW is helping the City of South Bend address this problem more efficiently with a network of reliable sensors.

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University of Connecticut

INW Equipment Sets the Standard at a Leading University

Dr. Gary Robbins at the University of Connecticut has been researching groundwater resources for years using INW’s AquiStar and WaveData product lines. Dr. Robbins’s programs at the University of Connecticut include field methods in hydrogeology, ground water hydrology, and ground water modeling. Dr. Robbins chooses INW smart sensors for their quality, price and INW’s exceptional service.

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INW’s AquiStar smart sensors have generated very valuable data with impressive results throughout the years. In fact, James Cassanelli, a graduate student enrolled in Dr. Robbins’s program used a CT2X sensor to collect results with unprecedented accuracy. The graph to the right shows almost perfect reproducibility of the conductivity readings for almost an entire year. The most incredible part of this reproducibility was that the conductivity of the water being profiled was about 300 microSiemens per centimeter!

The WaveData radios installed at the Water Center at the University of Connecticut have provided an easy-to-set-up, reliable means of collecting the data remotely for over five years. Data can be downloaded from anywhere with Internet access, reducing the time spent traveling off-site for data downloads.


High Plains Water District

An INW Data System Helps a Texas Municipality

In 2009, the High Plains Water District in Lubbock, Texas was facing issues efficiently obtaining and managing water resource data from within their districts. Since water levels were dropping quickly, data collection and management was made a top priority by the district.

At the time, the only records being collected were annual manual water level readings. INW engineered a complete data management and collection system for High Plains. Allowing the district to see more useful parameters, the new system clarifies the picture of water supply and demand.

The systems provided included level sensors to measure and log the levels in each well. In addition, rain gauges were deployed to provide data on how much precipitation there was within the targeted areas of the district. Flow meters were also installed on the turbine pumps to monitor water usage and compare that data to water supplied by precipitation.


Vertical Hydraulic Gradient Sensing

Measuring VHG: The Case for a Wet/Wet Differential Pressure Sensor

For years, manometer-based direct measurement of head difference has been the standard for determining Vertical Hydraulic Gradient, or VHG. While this method offers more rapid measurement and simpler computation, it is not compatible with electronic pressure sensors—which provide more comprehensive datasets.

Because these datasets are particularly useful for monitoring fluctuations over time, Pacific Northwest National Laboratory research scientists Brad Fritz and Rob Mackley investigated a new method based on electronic sensors. The researchers used INW’s PT2X Wet/Wet sensor to conduct their study. Ultimately, they found the new method to provide comparable accuracy and more complete data.

According to Fritz and Mackley, “The VHG measured by the two methods agreed very well, as demonstrated by several comparison metrics.” This new development will provide groundwater scientists with improved data for measuring surface-ground water interactions, as well as alternative cost options. INW is proud to have assisted in this contribution to field.