pH/ORP Sensors use differential electrode technology.

GLI International, Inc. Mar 12, 2002

Press Release Summary:

pHD(TM) electrode sensors use 3 measuring electrodes. Process and reference electrodes measure pH differentially, with respect to third ground electrode, reducing reference junction fouling and minimizing ground loops. Preamplifier boosts electrodes' mV signals for transmission up to 3,000 ft. PEEK(R) and Ryton(R) bodies provide chemical resistance in aggressive process solutions. Convertible, insertion, and sanitary mounting styles are available.

Original Press Release:

New GLI pHD(TM) Sensors Provide High Accuracy and Greater Reliability

GLI International is offering a new line of Differential sensors for measuring pH and ORP in a wide range of applications. The pHD(TM) - series is the "intelligent choice for pH measurement," using unique GLI Differential Electrode Technology. Three measuring electrodes are used instead of the two contained in conventional pH sensors. The process and reference electrodes measure the pH differentially with respect to a third ground electrode. This superior technology is proven to provide unsurpassed accuracy, reduce reference junction fouling, and virtually eliminate ground loops, resulting in greater reliability with less downtime and maintenance. An industry-exclusive 30-month warranty program covers the pHD(TM)-series. These sensors have a built-in preamplifier to boost the electrodes' high impedance mV signals for transmission up to 3000 feet. The PEEK(R) or Ryton(R)-bodied sensors offer exceptional chemical resistance in aggressive process solutions. Convertible, insertion, and sanitary sensor mounting styles enable installation in most process applications.