Honeywell Electrode 7777 Meredian type pH ORP Combination Electrode is original.
Honeywell’s 7777 Series of electrode mountings enables an user to interface Durafet II pH electrodes to a process via a ¾” threaded connection and Meredian II by either submersing the electrode or mounting it into a ¾” threaded connection.
Durafet II pH electrodes are the first industrial ISFET-based pH sensors. They join Honeywell’s industry-proven glass pH electrodes in the 7777-Series mounting to provide accurate and dependable pH measurement.
The Durafet II and Meredian II pH electrodes offer a reliable combination of measuring and reference electrodes together with an integral automatic temperature compensator in a 1-piece corrosion-resistant molded Ryton body.
Quick disconnect plugs enable easier installation and maintenance than with any other electrode available. The compact electrodes with 3/4” NPT male connections are easily adapted for in-line mounting without O-rings or special seals. Meredian II is also available in Immersion and
The large surface area of the reference junction resists fouling and maintains reliable lowimpedance contact with the process solution. The reference junction’s symmetrical annular shape surrounding the measuring element minimizes the effects of electrical current passing through the process solution.
This offers a significant improvement when compared with unsymmetrical electrode designs that develop large offset potentials and prohibit pH measurements in applications such as electroplating tanks or electrolytic cells. Durafet II Combination Electrodes feature state-of-the-art pH
measurement technology, using an ISFET (Ion Sensitive Field Effect Transistor) sensing element.