Description:

From water sterilization to chemical production, the reasons for needing to know the ORP of water are many.  Fortunately, Atlas Scientifics EZO-ORP circuit makes taking high accuracy ORP readings easy. From calibration to timed readings, the Atlas Scientific EZO-ORP circuit is a drop-in solution to a complex measurement.

Specification:

• Weight: 1.86 gramsCircuit dimensions: 13.97mm x 20.16mm
• Data format: ASCII
• Operating voltage: 3.3V − 5V
• Default I2C address: 98 (0x62)
• Data protocol: UART & I2C
• Temp. compensation: N/A
• Calibration: Single point
• Supported probes: Any type & brand
• Response time: 1 reading per sec
• Accuracy: +/– 1mV
• Range: -1019.9mV − 1019.9mV
• Reads: ORP
  

References:

Website with datas heet, examples, etc.