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Dissolved Oxygen Kit

Atlas Scientific is on a mission to make high-quality sensors for environmental monitoring available to everyday hackers and makers. All of their kits are easy to calibrate and connect to your microcontroller-based project.

There are basically two easy ways to measure oxygen dissolved in water: You can guess and then insist that you measured it, which has the obvious disadvantage of being wildly inaccurate; or you can just use the Atlas Scientific Dissolved Oxygen Kit.

The Dissolved Oxygen Kit comes with everything you need to take accurate, full-range D.O. readings for your environmental monitoring, hydroponics, wine making, fish keeping... well, any project where you need to continuous or intermittent Dissolved Oxygen readings. There's a simple 5-second calibration that is required before you can deploy the probe (calibration solution is included with the kit) and it can be immersed and operating continuously for 12 months before recalibration is recommended!

The Dissolved Oxygen circuit returns data in the form of Mg/L to two significant figures. Readings can be taken either dependent or independently of temperature or conductivity and the probe will function correctly in fresh-, salt- or brackish water.

  • Dissolved Oxygen Circuit
  • Dissolved Oxygen Sensor
  • 100ml (4oz) 0 Dissolved Oxygen calibration solution
  • Male BNC connector
  • BNC connector breakout board
  • D.O. Circuit decal
  • Range: 0-20 mg/L
  • Probe Body Material: Epoxy and Noryl
  • Max Probe Temperature: 50 Degrees C
  • Max Probe PSI: 690 kPa (100PSI)
  • Full range D.O. readings +/- 0.1
  • Accuracy within two significant figures (XX.XX Mg/L)
  • Temperature dependent or temperature independent readings
  • Fresh water/Saltwater/Brackish water readings
  • Conductivity dependent or conductivity independent readings
  • Simple 5 second calibration
  • Data output is in Mg/L

Dissolved Oxygen Kit Product Help and Resources

Core Skill: Programming

If a board needs code or communicates somehow, you're going to need to know how to program or interface with it. The programming skill is all about communication and code.

2 Programming

Skill Level: Rookie - You will need a better fundamental understand of what code is, and how it works. You will be using beginner-level software and development tools like Arduino. You will be dealing directly with code, but numerous examples and libraries are available. Sensors or shields will communicate with serial or TTL.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

1 Electrical Prototyping

Skill Level: Noob - You don't need to reference a datasheet, but you will need to know basic power requirements.
See all skill levels


Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • Two things I have found out. Firstly, the specimen code tries to set the baud rate to 13400. This does not seem to work, but 9600 does. Secondly, the calibration command should be CAL and not Cal (it appears to be case sensitive).

  • Can this probe be left underwater for long periods of time for monitoring farm fish tanks?

    • This Dissolvd Oxygen Probe can be fully submerged in fresh water or salt water, up to the BNC connector indefinitely.

  • Do you have the I2C version for sale? Pictures have the UART version.

  • Finally a DO sensor that I can affo.... Aw crap. Never mind. Is platinum the key functional component of these sensors? I have no idea why they cost so much.

    • Probably the Pt. These function partially by reducing (adding electrons to) oxygen. Even platinum has a rather large overpotential for reducing oxygen, around half a volt. For hydrogen, the overpotential (for oxidation at a platinum electrode) is maybe a tenth of that. A good oxygen reduction catalyst would improve the efficiency of hydrogen fuel cells a lot.

      Electrochemistry can be pretty vexing, and hence, expensive.

  • Hi. I would want to know if the oxygen dissolved probe is based on an optical sensor. thanks.

  • Will this function with Wine?

    • The datasheet lists winemaking as one of its suggested applications, so I guess the answer is yes. Datasheet here: http://www.atlas-scientific.com/_files/_datasheets/_probe/DO_probe.pdf

  • Why is the output in megagrams per liter?

  • Can the probe be continuously submerged in sea water for long periods (more than 1 year)?

  • What's the electric parameter to read in the DO sensor? What's the range of that parameter?

  • How can i avail this? im from the philippines.

    • Contact our customer service team and they should be able to assist you further.

  • What are the dimensions for the Atlas sensors?

  • Any idea if this would be able to detect the level of O3 (ozone) dissolved in water?

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