Honeywell’s 7777 series use either Durafet® II pH (7777D) or Meredian II pH/ORP electrodes that offer a reliable combination of pH measuring and reference electrodes together with an integral automatic temperature compensator in a 1-piece corrosion-resistant molded Ryton body.
The Durafet II non-glass sensor is durable and provides exceptionally fast response, making it ideal for a range of in-line applications. It produces low impedance pH signals even at low temperatures with no sodium error or ORP interference. The Durafet II mountings are available for only in-line installations
The Meridian II pH/ORP electrodes use glass pH sensors and platinum or gold ORP sensors. These mountings are suitable for in-line and submersion applications.