Make turbidity sensor
From emboxit
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
The sample range we experimented with was quite small, with samples at 2, 5, and 8 NTU,
(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
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.
- OSRAM IR Leds:
- SFH4550 70mW, 3'
- SFH4650 60mW, 15'
- SFH4655 60mW, 15'
- SFH4715S 1W, 45'
- OSRAM IR detector
- BPY62 8' half angle
Related links
References
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