Make turbidity sensor

WashForAll Turbidity sensor

• Wash for All group <ref> wash for all </ref> develops low cost sensors and tools and it is oriented on "universal access to clean drinking water and sanitation"
• Based on TAOS TSL230R <ref> TSL230 </ref>sensor

• http://wash4all.org/wp/blog/

• http://wash4all.org/wp/hardware-updates-from-cornell/

The sample range we experimented with was quite small, with samples at 2, 5, and 8 NTU,

• http://wash4all.org/wp/testing-our-new-turbidimeter/

(single-beam IR LED with TSL230R sensor) 

• This setup achieved the following accuracy measures:

± 0.5 NTU in the range of 0-20 NTU

± 2.0 NTU in the range of 20-200 NTU

± 2% in the range of 200-1000 NTU

• http://wash4all.org/wp/low-cost-turbidimeter-project-new-sensors-3d-printed-parts/

After getting feedback on the device from some non-profit and charity agencies focused on rural, low-cost water testing, 
we’ve begun work on reducing costs even further and developing 
 a first-stage model that is suitable for assessing the chlorine demand of untreated water. 
In technical terms, this means it will have an accuracy of +/- 1 NTU on a range of 0-20 NTU, and +/- 5% in the range of 20-50 NTU.

• OpenSource Turbidimeter

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• Technologies for Measuring Turbidity in Drinking Water Production
• AVNET leds for turbidity sensor

• OSRAM IR Leds:

• SFH4550 70mW, 3'
• SFH4650 60mW, 15'
• SFH4655 60mW, 15'
• SFH4715S 1W, 45'

• OSRAM IR detector

• BPY62 8' half angle

• ManyLabs

Related links

• Turbidity range
• Turbidity sensor
• TSL230

References

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