SEN0161 pH Sensor V2.0 - Arduino Compatible Expand

SEN0161 pH Sensor V2.0 - Arduino Compatible

DFRobot DFRobot



The SEN0161 pH Sensor V2.0 is an Arduino compatible kit for quickly and accurately measuring pH levels for both hobbyist and professional applications.

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The Arduino compatible SEN0161 pH Sensor V2.0 is a clever little module designed to measure the acidic and alkaline levels of liquids by identifying the pH, or hydrogen ion concentration index, level of the solution. It uses Sensors to measure the level of impedance of the solution instead of relying on a human to compare the results with a specific colour-index. This results in far more accurate readings, as you can discover the exact pH levels rather than deciding on whether the solution looks more yellow or orange – which is particularly tough if the user is colour-blind or the environmental lighting conditions are not optimal.

Although this Electronics Module is part of the DFRobot “Gravity” series, it can be used for both hobbyist and professional applications due to the ease of use, compatibility with a wide range of modular electronics, as well as the consistently high levels of accuracy that it offers. It operates on any voltage between 3.3V and 5.5V DC, allowing it to be used with many different Microcontrollers like the Arduino UNO, and requires no soldering or complicated setup procedures to get it working optimally.

Just be sure to keep this unit clean, and avoid even small bumps or scratches to the glass probe on the end. With such a high level of accuracy, even a small scratch or dent that is invisible to the naked eye can easily affect the results that the probe gives. Fortunately though, the probe comes with a protective cap to prevent any unexpected damage, allowing you to keep it safe and extremely accurate for when you need to get scientific and measure the hydrogen ion concentration index of a solution.

With a consumer-centric approach, DFRobot have ensures that this little kit includes the pH probe with cap, the signal conversion board, an analogue sensor, some M3 screws and M3 nylon standoff pillars, two waterproof gaskets and two sets of pH 4.0 and pH 7.0 solutions to calibrate the sensor. This ensures that all you need to get is a microcontroller in order to get straight into the action and measuring the pH levels for agriculture, medicine, chemistry, as well as many other professional and hobbyist applications.


SEN0161 pH Sensor V2.0  –  Technical Specifications:

  • Operating Voltage

– 3.3V to 5.5V DC                                                        

  • pH Measuring Range

– 0 to 14

  • pH Measuring Accuracy

– ±0.1 @ 25°C

  • pH Measuring Response Time

– <2 Minutes

  • Operating Temperature Range

– 0° to 60°C

  • Ideal Measuring Temperature

– +25°C

  • Onboard Interface

– PH2.0

  • BNC Connector Cable Length

– 100cm

  • Dimensions (Signal Board)

– 42 x 32mm


Typical Applications for the SEN0161 pH Sensor V2.0:

With such high levels of accuracy and impressive compatibility with a wide range of different Development Platforms, microcontrollers and modules, with an included signal conversion board to handle all of the complicated electrical conversions and turn all of the data into legible information for users. Just remember that you will need to isolate this signal board from conductive surfaces for the same reason that you need to keep the probe clean, as the high sensitivity of this SEN0161 pH Sensor V2.0 can be easily disturbed or influenced by external impedances.


Additional Resources:

  • To find out more about the intricacies of this sensor, the DFRobot Gravity Analogue pH Sensor Wiki offers some handy insights and resources to help you understand the sensor better and get started with your next project.


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SEN0161 pH Sensor V2.0 - Arduino Compatible

SEN0161 pH Sensor V2.0 - Arduino Compatible

As self-proclaimed “Robo-holics”, DFRobot is a company comprised of over 100 staff members, of which 30% are engineers who love to build robots. It was started in 2008 with the goal of embracing and promoting open-source hardware, with a core focus on Arduino, Raspberry Pi and their very own LattePanda development boards. Since then, DFRobot have manufactured over 1300 unique modules, sensors and components that all work together and complement each other, allowing users like us to enjoy a full spectrum of cutting edge robotics and electronics without having to pay premium prices.

With the primary goal of developing and manufacturing great quality products, while making them accessible to as many people as possible, DFRobot are rapidly becoming one of the most common-place brands in the world of open-source robotics and electronics. With more than 1300 products developed in-house, and an impressive range of different categories and specialisations, there are few brands in the world who can compete in terms of quality, accessibility and genuine innovation.