Until you’re faced with the challenge, it’s hard to see why anyone would care about dissolved oxygen. But, here you are.
Accurately calculating the D.O. of water is quite difficult. Once all the mathematical calculations are done, it takes hundreds of chemical titration tests to confirm that the readings are correct over the full scale. The process is agonizing. Fortunately, you don’t have to do any of that. The Atlas Scientific EZO-DO Circuit gives you accurate D.O. readings in Mg/L and percent saturation. Using its temperature, salinity, and pressure compensation features, you can be sure the readings are correct no matter where in the world you are.
| Reads | Dissolved Oxygen |
| Range | 0.01 − 100+ mg/L 0.1 − 400+ % saturation |
| Accuracy | +/– 0.05 mg/L |
| Response time | 1 reading per sec |
| Supported probes | Any galvanic probe |
| Calibration | 1 or 2 point |
| Temp. compensation | Yes |
| Salinity compensation | Yes |
| Pressure compensation | Yes |
| Data protocol | UART & I2C |
| Default I2C address | 97 (0x61) |
| Operating voltage | 3.3V − 5V |
| Data format | ASCII |
| Circuit dimensions | 13.97mm x 20.16mm (0.55″ x 0.79″) |
| Weight: | 1.77 grams |
EZO™ Dissolved Oxygen Circuit Datasheet
Wiring Diagram
Arduino Uno Sample Code
Arduino Mega Sample Code
Arduino I2C Sample Code
Raspberry Pi Sample Code (UART, I2C, USB)
UART and I2C mode switching
EZO UART Library
EZO I2C Library
RoHS Certificate
CE Certificate
EZO™ Dissolved Oxygen Circuit Footprint File (*.dxf)
EZO™ Dissolved Oxygen Circuit 3D model (*step)
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