Next Article in Journal
A Heterogeneous IoT Data Analysis Framework with Collaboration of Edge-Cloud Computing: Focusing on Indoor PM10 and PM2.5 Status Prediction
Next Article in Special Issue
Comprehensive Improvement of the Sensitivity and Detectability of a Large-Aperture Electromagnetic Wear Particle Detector
Previous Article in Journal
Semi-Automated Data Labeling for Activity Recognition in Pervasive Healthcare
Previous Article in Special Issue
A Novel Monitoring Approach for Train Tracking and Incursion Detection in Underground Structures Based on Ultra-Weak FBG Sensing Array
Open AccessArticle

A Low-Cost Continuous Turbidity Monitor

Department of Chemical Engineering, Bucknell University, Lewisburg, PA 17837, USA
Department of Computer Science, Bucknell University, Lewisburg, PA 17837, USA
Author to whom correspondence should be addressed.
Sensors 2019, 19(14), 3039;
Received: 31 May 2019 / Revised: 24 June 2019 / Accepted: 8 July 2019 / Published: 10 July 2019
(This article belongs to the Special Issue Advanced Sensors for Real-Time Monitoring Applications)
Turbidity describes the cloudiness, or clarity, of a liquid. It is a principal indicator of water quality, sensitive to any suspended solids present. Prior work has identified the lack of low-cost turbidity monitoring as a significant hurdle to overcome to improve water quality in many domains, especially in the developing world. Low-cost hand-held benchtop meters have been proposed. This work adapts and verifies the technology for continuous monitoring. Lab tests show the low-cost continuous monitor can achieve 1 nephelometric turbidity unit (NTU) accuracy in the range 0–100 NTU and costs approximately 64 USD in components to construct. This level of accuracy yields useful and actionable data about water quality and may be sufficient in certain applications where cost is a primary constraint. A 38-day continuous monitoring trial, including a step change in turbidity, showed promising results with a median error of 0.45 and 1.40 NTU for two different monitors. However, some noise was present in the readings resulting in a standard deviation of 1.90 and 6.55 NTU, respectively. The cause was primarily attributed to ambient light and bubbles in the piping. By controlling these noise sources, we believe the low-cost continuous turbidity monitor could be a useful tool in multiple domains. View Full-Text
Keywords: turbidity; low-cost; continuous water quality monitor; water turbidity; low-cost; continuous water quality monitor; water
Show Figures

Figure 1

MDPI and ACS Style

Gillett, D.; Marchiori, A. A Low-Cost Continuous Turbidity Monitor. Sensors 2019, 19, 3039.

AMA Style

Gillett D, Marchiori A. A Low-Cost Continuous Turbidity Monitor. Sensors. 2019; 19(14):3039.

Chicago/Turabian Style

Gillett, David; Marchiori, Alan. 2019. "A Low-Cost Continuous Turbidity Monitor" Sensors 19, no. 14: 3039.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop