Analog Devices Inc. EVAL-CN0409-ARDZ Arduino Shield for Turbidity uses the ADPD105 photometric front end and a network of 860nm Infrared emitters and silicon PIN photodiodes to create a water turbidity measurement system. The system can measure low to high water turbidity levels ranging from 0FTU to 1000FTU (limited by available solution). The IR LED and photodiode network is arranged in such a way that it can support two of the most recognized turbidity measurement standards – ISO7027 (both ratio and non-ratio) and GLI Method. With three-point calibration, the typical accuracy that the system can achieve is ± 0.50 FTU or ±5% of the reading, whichever is greater. This accuracy, combined with the 0.05 FTU noise level, makes the measurements obtained using this system very reliable. The ADPD105’s ambient light rejection feature makes this circuit ideal for applications where accurate, robust, and non-contact turbidity measurements are critical. Applications for Analog Devices Inc. EVAL-CN0409-ARDZ Arduino Shield for Turbidity include chemical analysis and monitoring natural bodies of water, wastewater and drinking water.
0-4000 FTU Measurement
+/-0.5 FTU System Accuracy (0-1000 FTU)
Ambient Light Rejection
Analog Devices Inc. ADPD1080 & ADPD1081 Photometric AFEs
Integrated 14-bit photometric ADC & 20-bit burst accumulator; works with flexible LED drivers.