'Tecline' electrodes from Jumo are sensors for professional applications in process and industrial measurement technology, which are designed as combined combination electrodes. New are a pH and a redox combination electrode in heavy-duty design. The TecLine HD pH and the TecLine HD Rd work even in difficult processes with increased dirt and toxic loads or in oily media at temperatures up to +135 °C and 13 bar pressure. A special large-area PTFE ring diaphragm ensures a fast response time while at the same time being largely insensitive to large amounts of dirt or oily and greasy process and waste water. A standard double-chamber architecture prevents electrode failure in the event of penetrating electrode poisons via the extended diffusion path. A large salt reservoir in the reference system ensures long-term stable measurements. The pH version is also available with an integrated Pt1000 temperature sensor. The supplier's HT glass is used as the pH-sensitive membrane glass. The redox version is available with a platinum or gold dome.