Atlas Scientific EZO-pH Embedded pH Circuit .001-14

Works great. I had issues at first but it was due to not fully reading the datasheet. I could not get this ph circuit to function properly with the Raspberry Pi. Half of the time it would display incorrect results or not show at all. The device was being powered incorrectly because I had it plugged into the 5v and not the 3v pin on the raspberry pi. Hope this helps someone who runs into the same issue. After connecting it to the 3v pin, it functions flawlessy.

I was using a pi zero. First ph sensor I was able to put into i2c mode by following the online instructions by removing the ground wire to the sensor but the address failed to populate so I set it back to uart mode and was able to send a command. Then the sensor got hung up. It became unresponsive. Replacement came in but I was unable to power off the sensor by disconnecting ground to put into i2c mode. Sensor stayed powered on with just the vcc.

Using this interface board is really a no-brainer. Atlas has really made accurate reading of pH probes so simple with this board. I use this board with an Atlas pH probe and it's interfaced to a Raspberry Pi 3 Model B using I2C for communications. I can't say enough good things regarding Atlas or their equipment. Use this pH board and probe if you want accurate, easy, painless pH data in your projects!

The stamp requires moisture free and very clean environment. So, make sure that you put it in a vacuum sealed protective box. I had to buy several of them and they all develop problems with measurements if the stamp is even briefly exposed to anything dirty or corrosive in the air around it.

Works very well. The documentation is great and easy to understand. Cannot recommend enough

Very Sensitive pH sensor, don't touch the components on top of the pH sensor you'll fry the think or won't read accurate pH values. You are warned, I had to buy 2 of them because the voltage regulator of the pH very sensitive. I wasn't reading the right values, I tried to set it to manufacturer mode and recalibrate it but it won't calibrate to 10 pH.

I've gone through a few of these so far. My current one is in an automated hydroponic grow tent where I have graphs and data on everything imaginable in it. I've been amazed at how sensitive these have been to humidity. Any drastic humidity shifts can cause some serious spikes in PH. The only time these spikes happen is when I open the tent. The issue then is that my system will detect a PH issue and start dispensing PH down or up when it's only because I opened then tent. Once the humidity levels out then the PH stays stable. This has been the same with multiple PH ezo boards. Other issues I've had is the board losing the ability to store calibrations. This happened with my last one. Replaced it and was able to calibrate just fine.

It works. A little more complicated than other ph circuits tho... i suppose it depends on your applicstion