2764-2767 Differential DryLoc pH-ORP Electrodes


The Signet 2764-2767 Differential pH & ORP electrodes are built with the DryLoc® connector, a Ryton® body, and a PTFET reference junction to handle even the most extreme and harshest of chemical applications.

These differential electrodes use field-proven 3-electrode differential technique: the pH and reference electrodes are measured against a ground electrode, ensuring a steady and stable signal. A key feature is the reference electrode which is protected in a glass half-cell embedded in the reference chamber and is protected from compounds that may contain sulfides (S2-) and metals. To ensure long service life, the reference features a refillable electrolyte chamber and a replaceable equitransferant salt bridge. The patented porous PTFE reference junction resists fouling, clogging and chemical attack.

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 one minute. Various temperature devices offered include 3KΩ, 300Ω, or PT1000 RTD. The electrodes are used with the Signet 2750 Sensor Electronics, which provide a blind 4 to 20 mA output or use the digital (S3L) output to connect to Signet's 8900 or 9900 instruments. The electrodes can also be used with the Model 2760 preamplifier to connect to the Signet 8750 instruments.

Product Overview

Fields of Application:

  • Water and Wastewater Treatment
  • Coagulation and Flocculation
  • Plant Effluent
  • Plating Baths
  • Scrubbers
  • Textile Dye Process
  • Harsh Chemical Applications
  • Heavy Metal Removal and Recovery
  • Toxics Destruction
  • Surface Finishing


  • Differential design for stable measurements in the most aggressive applications
  • Long service life even in severe or difficult chemical applications
  • Water-tight DryLoc® connector with foulproof gold contacts
  • Porous PTFE reference junction
  • Rebuildable reference electrode
  • Solution ground
  • Temperature sensor (pH)
  • Quick temperature response
  • Easy sensor replacement using DryLoc® electrode connector
  • Compatible with all Signet instruments and other supplier's instruments


Compatible Products