The sensor is composed of :

- A "Platinum electrode" made of a Platinum thread welded to the extremity of a crystal tube. A removable polyethylene strainer protects the activate part of the electrode.

- A "reference electrode" Ag/AgCl type with an electrolyte coated with plastic saturated with KCI "PLASTOGEL"®
The "PLASTOGEL"® electrolyte is directly in contact with the environment without capillary or porous interposition. There is no risk of reference blocking or defusing.

- A plastic (Delrin) handle ensures the mechanic solidity of the sensor and the waterproof sealing of the cable.

- A conservative case for the maintain of the glass electrode in humid atmosphere