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HACH COMPANY was established in 1947, in Ames, Iowa, USA. For more than 60 years, Hach has been the world market leader for Analytical Instrumentation for Complete Water Analysis, providing solutions for lab, process and field.

In 2002, GLI, a leading US manufacturer of process electro-chemistry analytical instruments, became part of the Hach Company family.

Water analysis has to be right. Our customers deserve complete, reliable solutions that they can be fully  confident in. Hach is your answer. We make water analysis simpler

Differential pH/ORP Sensor


Differential pH/ORP Sensor


Applications:  Drinking Water, Wastewater, Industrial Water, Environmental.

LCP (Liquid Crystal Polymer), Convertible Mounting Style, 4.5m Analog Cable, 5-Wire with Built-In Preamplifier, General Purpose Glass pH Electrode

  • Exceptional Performance with the Differential Electrode Measurement Technique
  • Lower Maintenance Needs with the Replaceable Salt Bridge
  • Built-in Preamp or Two-Wire Transmitter
  • Versatile Mounting Styles
  • 1 year warranty and 30 month pro-rated replacement


Cable Length:4.5 m 15 ' 5 conductor (plus shield)
Diameter:2.17 in ( 55 mm )
Dimensions (D x L):2.17 in x 7.09 in (55 mm x 180 mm)
Drift:0.03 pH per 24 hours, non-cumulative
Electrode Material:Glass
Flow:max 3 m/s
Material:Ground Electrode: Titanium or Hastalloy C
Mounting:Convertible (immersion or flow-through mount)
Operating Temperature Range:-5 to 95 °C
Pressure Range:max 10.7 bar Sensor only (pressure range of mounting hardware to be checked separately)
Range:0 to 14 pH
Sensor Thread:NPT at both ends
Temperature Sensor:NTC 300 ohm thermistor for automatic temperature compensation and analyzer temperature readout


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