The electrodes are designed manufactured according to purchasers requirements for :

• Operational conditions, temperature and pressure.

• Cable type and length .

• Length of measuring electrode.

The ZN-l reference electrode is used inside internally protected steel water boxes, tanks, pipes etc and is provided with a 1 screw- in thread for permanent fixture by using a weld-in flange . The measuring cell is covered with insulating material so that the only exposed area is the circular base at the bottom potential referring to H2- electrode: 0 77 V .