Multiparameter Sondes

EXO1

EXO2

6600 V2

6920 V2

600OMS V2

Legacy Sondes

All Legacy Sondes

CTD

CastAway CTD

Process Monitors

IQ SensorNet 2020 XT

IQ SensorNet 182

P 700 Orthophosphate

Aquaculture Systems

5200A Multiparameter

5400 MultiDO

5500 MultiDO Optical

AquaViewer App

Professional Series

Handheld Instruments

Pro Plus Multiparameter

ProODO Optical DO/OBOD

Pro20 Lab/Field DO

Pro1020 Field DO/pH/ORP

Pro1030 Field pH/ORP/Cond

Pro2030 Field DO/Cond

Pro30 Field Cond

Classic Handheld Series

556MPS Multiparameter

550A Dissolved Oxygen

63 pH/Conductivity

60 pH

58 Lab/Field DO

55 Dissolved Oxygen

Colorimeters

900 Chlorine

910 COD

pHotoFlex Colorimeters

Laboratory Series

pH1200

5000/5100 BOD/DO

3200 Conductivity

3100 Conductivity

MultiLab 4010-1

MultiLab 4010-2

MultiLab 4010-3

TruLab 1110

TruLab 1310 and 1310P

TruLab 1320 and 1320P

EcoSense

pH10A - pH Pen

pH100A - pH

ORP15A - ORP Pen

DO200A - DO

EC30A - Conductivity Pen

EC300A - Conductivity

9300/9500 Photometer

All YSI Accessories

Sensors, Cables, Calibration Solutions & more...

YSI Systems

Buoys & Floating Platforms

EcoMapper AUV

EcoNet Data-to-Web

Vertical Profiling

Towed Underwater Vehicles

Underway Sampling System

Other YSI Products

SonTek Acoustic Doppler Systems for water velocity

YSI Systems

DAA WaterLog

YSI Life Sciences

Ammonia/Ammonium

Blue-Green Algae

BOD (Biochemical Oxygen Demand)

CDOM

Chloride

Chlorophyll

Conductivity

Depth

Dissolved Oxygen

Free Chlorine

Level

Nitrate

Oil / Hydrocarbon

ORP / Redox

Photosynthetic Active Radiation (PAR)

pH

Resistivity

Rhodamine

Salinity

Specific Conductance

Temperature

Total Dissolved Solids (TDS)

Turbidity

Colorimeter Parameters

Photometer Parameters

Aquaculture

Coastal

Desalination

Estuary

Drinking Water

Groundwater

Hydraulic Fracturing

Laboratory

Oceans

Raw Water

Source Water

Storm Water

Surface Water

Wastewater

Watersheds / TMDL

Ask a Question

Events & Training

Find a Distributor

Product Service

Resource Library

Software Downloads

Welcome from the GM

History

News

Career Opportunities

Environmental Stewardship

Sustainability

Quality

Xylem Watermark

YSI - A Xylem Brand
Find YSI on Facebook Follow YSI on Twitter Watch YSI on YouTube
Login | Register
Loading

Colored Dissolved Organic Matter (CDOM/fDOM)

Chromophoric Dissolved Organic Matter or Colored Dissolved Organic Matter (CDOM): Both refer to organic matter in water that absorbs strongly in the ultraviolet (UV) spectrum. Fluorescent Dissolved Organic Matter (fDOM) refers to the fraction of CDOM that fluoresces. fDOM is a surrogate for CDOM, and a fast and easy means of tracking DOM in natural waters.

DOM and sediment in North Sea. Photo by NASA Earth Observatory
DOM and sediment in North Sea. Photo by NASA Earth ObservatoryDOM and sediment in North Sea. Photo by NASA Earth Observatory DOM in wastewater settling tank. Photo by John Rostron, wikimedia commonsDOM in wastewater settling tank. Photo by John Rostron, wikimedia commons EXO fDOM sensorEXO fDOM sensor

 

Send me a Quote!

Find a Distributor

YSI has Authorized Distributors all over the globe. View a map and find your closest contact for YSI Colored Dissolved Organic Matter (CDOM/fDOM) products and accessories.

Find a Distributor

Get Support

Have a question about your YSI Colored Dissolved Organic Matter (CDOM/fDOM) product? Check out the support page with resources compiled just for you.

Contact Technical Support

Product Service Centers

Want to return a product for service? Here you’ll find authorized service centers and instructions on how to send in your YSI Colored Dissolved Organic Matter (CDOM/fDOM) product.

Product Service

Measuring CDOM/fDOM is important because concentrations of CDOM affect submerged aquatic vegetation, coral reefs and other benthic communities.

Other fDOM applications include:

  • Continuous monitoring of wastewater discharge. fDOM fluorescence corresponds to total organic carbon (TOC), which is an indicator of discharge water quality.
  • fDOM concentration can indicate the dispersion, transport and mixing of a water mass.
  • Hydrology studies demonstrate connection between flow/discharge and fDOM concentrations in rivers and floodplains

EXO1 water quality sonde from YSI
 

EXO1 Water Quality Sonde

The EXO1 multiparameter water quality sonde collects data with up to four user-replaceable smart sensors and an integral pressure transducer for depth.

 

 EXO2 water quality sonde from YSI
 

EXO2 Water Quality Sonde

Collect data to 250 m with the advanced EXO2 sonde – six replaceable smart sensors and a central wiper to clean biofouling.

 

EXO sonde with fDOM sensor in forested watershed
 

A Closer Look at fDOM Measurement


Archived Webinar:
A Closer Look at fDOM Measurement


Original Broadcast: February 26, 2013 —1:00 PM - 1:45 PM EST


Listen to an informative webinar about measuring dissolved organic matter in surface water using YSI's newest smart sensor, fDOM.

We discuss topics including:

• What is fDOM?
• How does field fDOM measurement work?
      - Details on YSI's EXO fDOM sensor
• Applications for fDOM measurement with EXO, including:
     - Augmented sensor suite for enhanced ecosystem monitoring
     - Proxy for DOM/DOC/TOC, land-derived nutrients and contaminants
     - Light attenuation and primary productivity studies 
• Interpreting fDOM data and interferences
• Benefits of combining fDOM with other water quality sensors

 

 

 

<< Back to Parameters page