YSI ProDSS Turbidity Sensor
Features
- 0 to 4000 FNU measurement range
- T63<2 sec response time
- 0.3 FNU or ±2% of reading accuracy from 0 to 999 FNU
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
Overview
The ProDSS turbidity sensor is a digital smart sensor featuring welded titanium construction for use with the ProDIGITAL family of instruments. Compatible instruments include the ProDSS Meter, ProSwap Meter, and ProSwap Logger.
Mechanics
Turbidity is the indirect measurement of the suspended solid concentration in water and is typically determined by shining a light beam into the sample solution and then measuring the light that is scattered off of the particles which are present. The suspended solid concentration is an important water quality factor and is a fundamental measure of environmental change. The source of the suspended solids varies in nature (examples include silt, clay, sand, algae and organic matter), but all particles will impact the light transmittance and result in a turbidity signal.
Customizable
The ProDSS Turbidity sensor employs a near-infrared light source and detects scattering at 90 degrees of the incident light beam. According to ASTM D7315 method, this type of turbidity sensor has been characterized as a nephelometric near-IR turbidimeter, non-ratiometric. This method calls for this sensor type to report values in formazin nephelometric units (FNU). FNU is the default calibration unit for the ProDSS sensor, but users are able to change calibration units to nephelometric turbidity units (NTU), raw sensor signal (RAW), or total suspended solids (TSS).
ProDSS Smart Sensor Specifications:
| Parameter |
Range | Accuracy* | Resolution |
|---|---|---|---|
|
Conductivity |
0 to 200 mS/cm |
From 100 to 200 mS/cm: ± 1% |
**0.001, 0.01 or 0.1 µS/cm |
|
Temperature |
-5 to 70 °C |
± 0.2 °C |
0.1 °C or 0.1 °F |
| Dissolved Oxygen |
0 to 50 mg/L |
From 0 to 20 mg/L: ± 1% From 20 to 50 mg/L: ± 8% |
0.01 mg/L or 0.1 mg/L |
| pH |
0 to 14 |
± 0.2 |
0.01 |
|
ORP |
-1999 to 1999 mV |
± 20 mV |
0.1 mV |
| Turbidity |
0 to 4000 FNU |
From 0 to 999 FNU: ± 2% From 1000 to 4000 FNU: ± 5% |
0.1 FNU |
| Freshwater Total Algae |
0 to 100 µg/L PC |
r2 = 0.999 |
0.01 µg/L PC |
| Saltwater Total Algae |
0 to 280 µg/L PE |
r2 = 0.999 |
0.01 µg/L PE |
| Nitrate |
0 to 200 mg/L |
± 10% |
0.01 mg/L |
| Ammonium |
0 to 200 mg/L |
± 10% |
0.01 mg/L |
| Chloride |
0 to 1000 mg/L Cl |
± 15% |
0.01 mg/L |
*Reference specification for each sensor for more details on accuracy
** Range dependent
Select Options
In The News
Cal Poly, San Luis Obispo Manages Monitoring Efforts in Morro Bay
California Polytechnic State University, San Luis Obispo (Cal Poly, SLO), has been monitoring Morro Bay for decades, and while the monitoring program has changed over the years, the dedication to monitoring the bay has remained the same. The project started in 2006 as a Packard Foundation-funded initiative to monitor water quality flowing in and out of Morro Bay. The goal at the time was to use the data collected to develop and inform an ecosystem-based management plan in collaboration with the Morro Bay National Estuary Program (MBNEP). Since the estuary was the focus at the time, researchers were monitoring water flowing into the estuary from Chorro Creek and Los Osos Creek.
Read More
Green Water in Green Bay: Using Data Buoys to Monitor the Southern Bay
While the bay of Green Bay has been referred to as the largest freshwater “estuary” in the world, the watershed hosts intensive agriculture and contributes one-third of Lake Michigan’s total phosphorus load. The Fox River flows into the bay, carrying excess nutrients largely the result of non-point source runoff from the watershed. With a history of deterioration extending well into the last century, the bay ecosystem suffered significant declines in water quality. This, in turn, stimulated major clean-up and ongoing restoration efforts to improve water quality. Tracking these changes is an important aspect of ecosystem management.
Read More
Cross-Border Sewage Contaminated Flows: Monitoring the Tijuana River
The Tijuana River runs across the US-Mexico boundary, flowing into and throughout southern California, carrying with it nutrients and contaminants throughout the estuary. In recent decades, the flows have been heavily polluted with untreated sewage from the City of Tijuana. The wastewater enters the greater Tijuana River estuary, impacting coastal communities and disrupting the natural environment. In order to better understand these cross-border flows, researchers out of San Diego University sought to monitor the waterway test the capabilities of in-situ sensors to measure the contaminated water. Natalie Mladenov and Trent Biggs were two of the researchers involved in the project, deploying a real-time monitoring system in May of 2021.
Read More
