Foxboro 871PH pH and OPR Sensor

871PH Analytical Sensor

The Foxboro 871PH sensor is a rebuildable, high-performance pH and ORP sensor designed for use in demanding process industries where accuracy, durability, and low maintenance are critical. Unlike conventional disposable pH probes, the 871PH is engineered with a modular construction, enabling users to replace the individual components—like the electrode, reference junction, or electrolyte—without discarding the entire sensor. This modularity makes the 871PH ideal for long-term deployment in chemical processing, pharmaceuticals, food and beverage, water treatment, and other challenging applications where conditions such as high temperature, harsh chemicals, or fouling often degrade typical pH sensors prematurely.

Ideal for:

• Water/ Wastewater
• Chemical and Petrochemical
• Pharmaceutical and Biotech
• Food and Beverage
• Pulp and Paper
• Mining
• Metals and Refining

Features:

• Modular, re-buildable design
• domed, spherical, flat electrode geometries
• DoplHin high-temp glass
• ORP electrode: platinum or gold
• Double junction reference
• Nafion barrier
• Active temperature compensation via built in sensor
• Ryton or CPVC body material
• Titanium or stainless steel body
• Twist-lock or quick-connect fittings
• Pre-attached cables
• Operating range up to 121°C
• Compatible with:
  • 870ITPH
  • 875PH
  • 876PH
  • 873PH
  • 873DPX
• Green Premium certified
• RoHS, REACh, WEEE compliant

Document Downloads:

• 871PH-Data Sheet