EZO™ Dissolved Oxygen Circuit

Article number: Part # EZO-DO
Availability: In stock (39)

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

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