Analog pH Sensor Pro Kit for Arduino

If you often work with chemicals and dilutions in industrial environments, or simply like to stay very health-conscious with your drinking water, then you can understand the importance of acquiring the ideal pH value for whatever liquids you’re dealing with. However, pH levels can be somewhat confusing at times, and more often than not the most convenient solution to measuring pH is with old-school Litmus-style colour-change tests that can become expensive over time while offering a somewhat subjective (and often imperfect) reading depending on who is looking at it.

This is where the value of Electronics in this pH sensor pro kit comes in, as it is still very affordable despite being industrial grade, but can work continuously for up to a year before you even need to consider replacing it. And while there are a few steps that you need to take from time to time in order to maintain optimal measuring accuracy (As seen on the official DFRobot Product Page) it is certainly one of the easiest and most cost-effective tools for almost any pH-related projects – from hobbyist to industrial – up to a temperature of around 60°C.

What makes this particular pH meter so great is that it’s actually an Industrial Grade Analog pH Sensor, but has been designed by DFRobot to be compatible with Arduino, allowing Makers like you and me to enjoy a reliable pH sensor that is both accessible and relatively easy to use in conjunction with simple Arduino Boards. Just remember, however, that this module needs 5V supply, so it’s preferable to use a 5V Arduino Board to operate it, so as to avoid voltage mix-ups and potential overloads.

Please Note: This pH meter is best used with a constant and precise 5V input from a switching power supply. Any small fluctuations can lead to incorrect readings and potentially cause the meter to lose calibration settings.

Additional Resources:

• The incredibly helpful Haoshi H-101 pH Electrode User Manual
• pH Sensor Schematic
• pH Sensor Board Layout

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.