Turbidity sensor -- how does turbidity reading scale with distance between Tx and Rx?
Glenn.Zelniker404 2025-03-21 04:16:49 98 Views2 Replies I am using the SEN0554 turbidity sensor. The documentation suggests a distance of 45-50mm between the transmitter and the receiver but I am forced to deal with a 25mm container. Knowing very little about turbidity measurement, I have no idea how the sensor readings vary with distance between Tx and Rx parts. Can I still get meaningful readings that I can then scale? Can I simply use “reference” liquids and calibrate that way? Or will the part fail completely at 25mm separation? Any help would be appreciated.
The sensor operates based on light scattering and absorption. Reducing the Tx-Rx distance to 25mm will likely increase the intensity of light received by the detector. This can shift the baseline readings, making the turbidity values appear lower than they are. The dynamic range of the sensor may be affected. This can make extreme turbidity values harder to distinguish. If you want to accommodate turbidity, TDS, and pH sensors into a single PCB, you can make one like this. It will give you a complete picture of water quality.
https://www.pcbway.com/project/shareproject/PCB_DESIGN_AND_DEVELOPMENT_FOR_PH_TURBIDITY_AND_TDS_MODULES_5a8d79e8.html
lia.ifat 
