I actually have no problem at at all.
I've been growing hydroponically for the past two years. This is my forth PH pen, the Apera PH 20. It holds stable readings and calibrates easily. Something the previous pens just couldn't do... For very long anyway.
I called support the other day with a very small problem and spoke with Brian. very knowledgeable and helpful thank you Brian.
about 1 month ago
I bought a PC60-Z about 3 months a go and the beginning I connected to the Bluetooth but when I update my phone the Bluetooth connection disappears and I try to connect it to the ZenTest application via Bluetooth it never finds the device or asks me for a pin that I don't know which one it is? Can help me with this problem?