WET Labs' ECO Puck

ECO Puck

The puck is a miniature version of the popular Environmental Characterization Optics (ECO) series sensors built for OEM applications

WET Labs manufactures a miniature version of the popular Environmental Characterization Optics (ECO) series sensors for OEM applications. ECO series sensors incorporate a common set of options with a single basic design. The puck™ version is specifically designed for applications where space and power requirements are critical. Pucks™ are ideal for a wide variety of applications, including AUVs, gliders, and profiling floats.

Available Configurations

Fluorometer (FL)

Single-wavelength measurement of your choice of chlorophyll-a, CDOM, phycocyanin, phycoerythrin, uranine (fluorescein), or rhodamine.

Combo Fluorometer-Turbidity Sensor (FLNTU)

Measures chlorophyll-a in µg/L and turbidity in NTU.

Single-wavelength Scattering Meter (BB)

Measures optical scattering at 124 degrees at your choice of 470, 532, or 650 nm wavelengths.*

Triple-Measurement Meter (Triplet)

2 scattering & 1 fluorescence, 1 scattering & 2 fluorescence, or 3 fluorescence measurements—your choice.
*WET Labs is correcting an error in our literature. ECO single channel backscattering instruments as built and calibrated have a physical centroid angle of 120°. The effective in-water centroid angle that accounts for the ECO backscattering sensor’s instrument specific weighting function is 124°. Our literature that refers to a backscattering angle of 117° for the instrument was incorrect.


Diameter6.3 cm
Length5 cm
Weight in air0.28 kg
Weight in water0.02 kg


Digital output resolution12 bit
RS-232 output19200 baud
Input7-15 VDC
Current, typical80 mA
Sample rateto 8 Hz


Temperature range0 to 30 deg C
Depth rating 600 m (std)
See equivalent meter specifications sheets for optics details.
Specifications are subject to change without notice.


Host software for ECO sensors.

Download ECOView 1.23

Released April 16, 2013
ECOView123.exe for Windows XP/Vista/7
Customer Alert

WET Labs ECO Centroid Angles for Back Scatter Measurements

Tuesday, June 7, 2016
Customer Alert

ECO Pressure and Temperature Options Discontinued

Monday, August 10, 2015
August 2015 ECO TP Customer Alert.pdf
Product Datasheet

ECO Puck datasheet

Monday, December 5, 2016
datasheet_ECO Puck161205.pdf
Product Manual

ECO Puck user manual (DE)

Tuesday, February 2, 2016
Product Manual

ECO Puck user manual (EN)

Tuesday, February 2, 2016
Product Manual

ECO Puck user manual (ES)

Tuesday, February 2, 2016
Product Manual

ECO Puck user manual (FR)

Tuesday, February 2, 2016
Technical Note

ECO Calibration Log Template

Wednesday, February 22, 2017
Technical Note

Instrument Voltage Ranges (in VDC)

Thursday, June 21, 2012

How do I get started using my new ECO?

Please read more here.

What are device files and which one should I use?

Device files allow ECOView to provide processed data output where applicable. Please read more here.

How do I change the ASV resolution?

See the following Technical Note: Getting the Highest Resolution on your ECO_v1 [PDF]

Where can I recycle dead batteries?

Try Call2Recycle to recycle dead batteries.

Do you want WET Labs to review your data?

In order for data questions to be answered in an efficient manner, WET Labs requests:

-  The serial number of the instrument data in question. The most current calibration information
can be verified and the instrument settings upon delivery can be checked.

-  Description of the deployment configuration. Questions to consider:

  •   What are the current instrument settings?
  •   What is the instrument orientation?
  •   Are there possible obstructions?
  •   Is it being used in a mooring, a profiler, or being towed?
  •   What were the deployment date and geographical location?
  •   How far into the deployment was the problem seen?
  •   What power supply and cabling are being used?
  •   What was the instrument condition during the last field service or retrieval?
  •   Do you have any pictures?

-  Raw data files of the physical data in question

  •   examples of good raw data.
  •   examples of questionable raw data .

-  Information about how the raw data was processed.

How do I determine if my ECO firmware is G2 or G4?

Learn more...

How do I protect my ECO from bio-fouling?

ECO instruments from WET Labs are designed for long term deployment capabilities with low power requirements, a large memory and an available Bio-wiper™. The Bio-wiper™ on the ECO was designed to protect the optical surface and has been very effective under most conditions.

If extra protection is required to prevent marine organisms from attaching to the instrument body near the optical head and interfering with the operation of the Bio-wiper™ we suggest using copper foil tape. The GoMOOS project developed a technique for their ECO sensors and WET Labs recommends this technique:

Apply electrical tape under the area where copper tape will be applied. This protects the meter from the significant adhesive residue of the copper foil tape.

Apply the copper tape to the prepped surfaces. There are different width copper foil tape options, with non-conductive adhesive, available from McMaster-Carr. NOTE: when applying the coper tape, the adhesive should not be touched. This will cause the tape to not stick to the electrical tape on the meter. When submerged in salt water, the copper will adhere more closely to the meter.

As long as the electrical tape is used, this technique does not violate the ECO warranty and WET Labs will service instruments that have had copper tape applied to them.

Do NOT apply copper tape directly to the meter. Its adhesive is extremely difficult to remove. Meters returned to WET Labs wrapped in copper tape without the electrical tape preparation will have additional service charges applied.


What is the back scattering angle of my ECO instrument?

The WET Labs’ ECO sensors have multiple back scattering angles depending upon type of sensor. This document will describe these angles based upon the type of ECO sensor selected by the customer. [PDF]

What should I use to lubricate bulkhead connectors?

WET Labs recommends keeping the connectors on your meter lubricated using a good quality silicone spray lubricant, such as 3M Silicone Spray or Loctite 8021 spray. These can be purchased at your local hardware store. Avoid silicone grease. It is messy and attracts contaminants. 

Do not use WD-40. It will destroy connectors.

What is the fluorescent stick that came with my meter used for?

Checking Meter Output with the Fluorescent Stick

ECO meters ship with a stick of fluorescent material with which you can check your meter's output response.

  • With the meter on and outputting data, hold the stick approximately 1/2-in (1 cm) from the lit detectors. Be careful to NOT touch the sensor face, as it scratches easily.
  • Pivot the stick to parallel with the meter's optics; the output in the  meter's "signal" column should increase to near maximum output as given on the meter's characterization or calibration sheet.
  • As you move the stick away, the output will decrease.