The
+GF+ SIGNET 2764-2767 Differential pH & ORP electrodes
are built with the DryLoc™ connector a Ryton® body
and Teflon™ reference junction to handle even the
most extreme and harshest of chemical applications.
These differential electrodes use the field-proven
3-electrode differential technique: the pH and reference
electrodes are measured against a ground electrode,
insuring a steady and stable signal. The key feature
of the differential design is the reference electrode.
The reference element is protected in a glass half-cell
embedded in the reference chamber and is protected
from compounds that may contain sulfides (H2S) and
metals, including lead, mercury, and silver. To ensure
a long service life, the reference features a refillable
electrolyte chamber and a replaceable equitransferant
salt bridge, both easily serviced in the field. The
patented porous Teflon™ reference junction resists
fouling, clogging and chemical attack. The other elements
of the design are the solution ground, the pH/ORP
electrodes, and the temperature element. The solution
ground eliminates noisy measurements by draining electrical
current away from the reference electrode. The pH/ORP
electrodes are designed with a flat or bulb measurement
surface, and a temperature device that is positioned
at the tip of the measurement surface, making the
temperature response of T95% less than 1 minute. Various
temperature devices offered include 3KO, 300O, or
PT-1000 RTD. The electrodes are used with the +GF+
SIGNET 2750 Sensor Electronics, which provides a blind
4 to 20 mA output or using the digital (S3L) output
may be used to connect to the +GF+ SIGNET 8900 instrument.
The electrodes can also be used with the Model 2760
preamplifier to connect to the +GF+ SIGNET 5700, 8750,
or other suppliers’ instruments.
