Hydro-Air P-38
Installation
pH / ORP Analyzer
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4.2.2. Conventional Combination Sensor With Grounding
Electrode (3-Wire Sensor)
The 3-Wire Sensor features an Active Electrode (pH), a Reference Electrode (Ref.)
and a Grounding Electrode (GND) to eliminate noise / disturbance in the process
medium. The Temperature Electrode (Temp. or T/P) is an optional feature of the
sensor for temperature compensation. Since the 3-Wire Sensor features a
Grounding Electrode, the short pin is not required in this setup.
Figure 5 Connection figure for 3-Wire Sensor
T/P or Temp. (Pt1000 / NTC10K)
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6
5
pH (Transparent)
Conductive layer
Coaxial
cable
Sensor Body
Ref. (Black)
GND (Green)
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