Article number: |
Part # EZO-DO |
Availability: |
In stock
(15)
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Connect your dissolved oxygen probe to this circuit to create a workable signal for your microprocessor using UART or I2C protocol.
Works with any brand and type of D.O sensor.

A galvanic dissolved oxygen probe consists of a PTFE membrane, an anode bathed in an electrolyte and a cathode. Oxygen molecules defuse through the probes membrane at a constant rate (without the membrane the reaction happens too quickly). Once the oxygen molecules have crossed the membrane they are reduced at the cathode and a small voltage is produced. If no oxygen molecules are present, the probe will output 0 mV. As the oxygen increases so does the mV output from the probe. Each probe will output a different voltage in the presence of oxygen. The only thing that is constant is that 0mV = 0 Oxygen. (A galvanic dissolved oxygen probe can also be used to detect the Oxygen content in gases).

Reads |
Dissolved Oxygen |
Range |
0 − 100 mg/L |
|
0.1 − 400+ % saturation |
Accuracy |
+/– 0.05 mg/L |
Response time |
~0.3 mg/L/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 |
|
datasheet EZO circuit
datasheet wiring diagram
