What’s the difference between a two point calibration & process cal?

Before diving into the calibration process it’s important first to understand the slope and zero-point of a pH sensor.
Inductive Technology: Changing the World of Liquid Analytics

Common issues with analog technology are signal leakage, noise from electrical interference, and ground loops.
pH Sensor Accuracy – Here’s the Truth

One of the most important things you can do to ensure an accurate pH measurement is to do a high-quality calibration.
pH Sensor Maintenance – Top 4 Recommendations

Like most process instruments, proper installation and maintenance play a significant role in determining the effective life of your sensor.
4 Reasons to Use a Gel-filled pH Sensor in Low Conductivity Water

Liquid-filled sensors are generally more complex in design, making them more costly to manufacture.