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 […]

Significant Upgrades to Handheld Turbidimeter!


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 […]

Recipients of EPA P3 Grant




Turbidimeter prototype challenge test data 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 […]

Testing our new low-cost turbidimeter


New low-cost sample holder
For a few months now we’ve been working to build an affordable turbidity meter that’s accurate enough for basic water quality testing. Our first prototype was Bluetooth-enabled, used a tethered Android smartphone to display data, and involved an expensive, high-precision 3D-printing process to make the chamber to hold the water sample. […]

Low-cost turbidimeter project: new sensors, 3D-printed parts!


WashOpt Control Panel with output
We at WASH For All are pleased to announce the alpha release of the water and sanitation infrastructure planning tool WashOpt. The demo site for this application is featured at plan.wash4all.org (the user’s guide is available here). This site will be the public face of a growing set of tools […]

Public decision aids for water and sanitation planning



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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. […]

Prototyping a Portable, Bluetooth-enabled Turbidimeter Unit


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Hi All, Today at approximately 3:41pm our hosting provider, A2 Hosting, suffered a power outage that affected multiple servers. Our entire site was down for roughly 90 minutes, and our virtual private server (VPS) was down for a few hours. We apologize if you had issues accessing any part of […]

Brief service disruption caused by server crash at A2 Hosting


One of the first tools that we put together at WASH for All is called OpenSourceWater. It lets water treatment plant operators send plant performance data to the web using SMS. It’s not fancy like Water For People’s FLOW, and that’s on purpose — being simple means it works, with […]

New overview map for OpenSourceWater monitoring tool



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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 […]

Hardware Updates from Cornell