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21 available 21 in stock
192.95 1+ units
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154.36 100+ units

Description: 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.

Kit Includes:

  • 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


Comments 7 comments

  • 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.

  • 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.

  • 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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