ChemSense pH and ORP (REDOX) electrodes with pinhole diaphragm are particularly suitable for the most demanding and harsh applications in process and chemical industries. They are combination electrodes with double chamber and cartridge style reference system with salt reserve. A PT-1000 temperature sensor is supplied integrated with the sensor. A pinhole diaphragm is the optimal solution for processes with a high solids content such as media that is subject to precipitation and/or crystallization reactions.