Blog


Significant Upgrades to Handheld Turbidimeter!

In the past few weeks, we have made some significant technological upgrades to our handheld turbidimeter. This product will soon be debuting on our brand new online store. Our circuit board has gone though two design iterations (using EAGLE) in effort to minimize size, and maximize organization and efficiency. Currently, the […]


Recipients of EPA P3 Grant

Welcome back to our blog! New and exciting developments are underway, with more on the visible horizon. Our team was recently awarded the second phase of an EPA P3 Grant Award, contributing $90,000 dollars in project funding and giving us the financial resources to delve in a host of product improvements […]


Turbidimeter prototype challenge test data

Testing our new low-cost turbidimeter 3

Well we’re two days late, but the data on our new turbidimeter setup were worth the wait. WASH For All members Alex Krolick and Chris Kelley tested the current build (single-beam IR LED with TSL230R sensor) against a handheld MicroTPI turbidimeter freshly calibrated at the factory. The two driving questions […]


Prototyping a Portable, Bluetooth-enabled Turbidimeter Unit 1

The develop4wash team has been working on constructing a self-contained, sealed turbidimeter using off-the-shelf components. Progress Here’s what it looks like so far: Internally, the unit is powered by an Arduino Uno microprocesser/development board and two TSL2561 luminosity sensors from Adafruit. Bluetooth connectivity is provided by a Virtuabotix Bluetooth module. […]

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Hardware Updates from Cornell

Building the Testbed We made a wooden block to keep the relative positions of the sample, sensor, and light source constant as we swap out samples: Originally we attempted to use a 3mW board-powered laser as the light source, but it was not powerful enough to generate any meaningful differences […]


Announcing the OpenSourceWater monitoring system

Hi Folks, Chris Kelley here. In July of 2012, I took a trip to Honduras to learn more about a type of gravity-driven, non-electric water treatment plant designed by members of the AguaClara program at Cornell University (headed by Dr. Monroe Weber-Shirk). Working with the Honduran development group Agua Para El Pueblo (APP), […]


Open-source water quality testing: turbidity 1

Turbidity refers to the dirtiness or cloudiness of a water sample. Technicians at water treatment plants regularly measure water turbidity before and after treatment. It’s a legal requirement in many countries, and one indicator of whether treated water is safe for human consumption. The unaided eye can distinguish cloudy water […]