PH Sensor – PH Composite Electrode E201-C Acid Base Detection
This pH sensor module consists of a glass pH probe and a signal conditioning board, which gives an output signal proportional to the acidic intensity of liquid solutions and can be interfaced directly to any 5 V micro-controller.
This sensor returns a voltage proportional to the tendency of the solution to gain or lose electrons from other substances, which is linked directly to the pH a substance. And it’s normally used in applications such as aquariums, hydroponics, laboratories, etc, where it is normally used for measuring acidity on a scale from 0 to 14, with 0 being the most acidic and 14 being the most basic (see the image below).



pecifications:
- Working voltage: 5 Vdc
- Working Current: 5-10 mA
- Detection concentration range: pH 0-14
- Detection range of temperature: 0-80℃
- Response Time: ≤ 5 s
- Stability Time: ≤ 60 s
- Working Temperature: -10 to +50℃
Calibration table:
| pH | Output (V) |
| 4 | 3.071 |
| 7 | 2.535 |
| 10 | 2.066 |
pH values of known substances

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