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Discontinued: Process Instruments

7777/7777D Immersion/In-Line Glass Mounting

7777/7777D mountings are easy to install, virtually maintenance-free and provide users with cost-effective, yet accurate and dependable pH measurement in easy in-line or immersion installations.

Overview
Accurate pH and ORP monitoring and control in a range of industrial processes results in efficient product quality and reagent control. Honeywell’s 7777/7777D mountings provide cost effective and accurate pH measurements in easy in-line or immersion installations.

What Is It?
Honeywell’s 7777 series use either Durafet® II pH (7777D) or Meredian II pH/ORP electrodes that offer a reliable combination of pH measuring and reference electrodes together with an integral automatic temperature compensator in a 1-piece corrosion-resistant molded Ryton body.
The Durafet II non-glass sensor is durable and provides exceptionally fast response, making it ideal for a range of in-line applications. It produces low impedance pH signals even at low temperatures with no sodium error or ORP interference. The Durafet II mountings are available for only in-line installations.
The Meridian II pH/ORP electrodes use glass pH sensors and platinum or gold ORP sensors. These mountings are suitable for in-line and submersion applications. ​

How Does It Work?
​The Durafet II and Meredian II pH electrodes have a ¾-inch NPT thread at each end. This allows for direct screw-in insertion into process pipelines. The Meredian electrodes can also be screwed to the end of a pipe for immersion style applications. The electrodes’ compact size eliminates the need for O-rings or any special seals. Quick disconnect plugs enable easier installation and maintenance. 
While the combination Durafet II pH electrode includes a replaceable reference junction frit and gel for durability, the Meredian II includes a permanent but maintenance-free reference junction with gel fill. The junction’s large surface area resists fouling while its symmetrical annular shape minimizes the effects of electrical current passing through the process solution for improved pH measurement. ​

What Problems Does It Solve?
​Honeywell’s 7777/7777D assembly is easy to install, virtually maintenance-free and provides users with cost effective, yet accurate and dependable pH measurement. This leads to a smooth and hassle-free process, enhanced control and improved product quality.
Application Note
Name
Description
File Size
Date
Size
Solution Notes on ORP Measurement for Microbiological Controls.
application/pdf 311.44 KB
11/12/2021
311.44 KB
Use wireless networking to gather remote analytical measurements
application/pdf 458.79 KB
6/3/2021
458.79 KB
Brochure
Name
Description
File Size
Date
Size
Brochure on how analytical instruments can improve power plant efficiency.
application/pdf 1.05 MB
6/3/2021
1.05 MB
Analytical brochure - measurements for pH, ORP, conductivity/resistivity, dissolved oxygen and hydrogen purity.
application/pdf 1.55 MB
6/3/2021
1.55 MB
Manuals and Guides
Name
Description
File Size
Date
Size
Electrode Mountings, Series 7777DVP Durafet III Electrode, 51-52-16-82-Issue 12
application/pdf 48.86 KB
6/4/2021
48.86 KB
Electrode Mountings, Series 7777 Meredian II Electrode In-Line or Immersion Mounting, 51-52-16-17-Issue 33
application/pdf 63.03 KB
6/4/2021
63.03 KB
Electrode Mountings, Series 7777D Durafet II Electrode for In-line Tee Mounting, 51-52-16-61-Issue 20
application/pdf 42.23 KB
6/4/2021
42.23 KB
Data Sheet
Name
Description
File Size
Date
Size
Durafet and Meredian II Combination pH/ORP Electrodes for Honeywell 7777 Mountings Specification
application/pdf 202.05 KB
6/4/2021
202.05 KB
Name
Description
File Size
Date
Size
Solution Notes on ORP Measurement for Microbiological Controls.
application/pdf 311.44 KB
11/12/2021
311.44 KB
Use wireless networking to gather remote analytical measurements
application/pdf 458.79 KB
6/3/2021
458.79 KB
Electrode Mountings, Series 7777DVP Durafet III Electrode, 51-52-16-82-Issue 12
application/pdf 48.86 KB
6/4/2021
48.86 KB
Durafet and Meredian II Combination pH/ORP Electrodes for Honeywell 7777 Mountings Specification
application/pdf 202.05 KB
6/4/2021
202.05 KB
Brochure on how analytical instruments can improve power plant efficiency.
application/pdf 1.05 MB
6/3/2021
1.05 MB
Electrode Mountings, Series 7777 Meredian II Electrode In-Line or Immersion Mounting, 51-52-16-17-Issue 33
application/pdf 63.03 KB
6/4/2021
63.03 KB
Electrode Mountings, Series 7777D Durafet II Electrode for In-line Tee Mounting, 51-52-16-61-Issue 20
application/pdf 42.23 KB
6/4/2021
42.23 KB
Analytical brochure - measurements for pH, ORP, conductivity/resistivity, dissolved oxygen and hydrogen purity.
application/pdf 1.55 MB
6/3/2021
1.55 MB
Name
Description
File Size
Date
Size
Solution Notes on ORP Measurement for Microbiological Controls.
311.44 KB
11/12/2021
Use wireless networking to gather remote analytical measurements
458.79 KB
6/3/2021
Brochure on how analytical instruments can improve power plant efficiency.
1.05 MB
6/3/2021
Analytical brochure - measurements for pH, ORP, conductivity/resistivity, dissolved oxygen and hydrogen purity.
1.55 MB
6/3/2021
Electrode Mountings, Series 7777DVP Durafet III Electrode, 51-52-16-82-Issue 12
48.86 KB
6/4/2021
Electrode Mountings, Series 7777 Meredian II Electrode In-Line or Immersion Mounting, 51-52-16-17-Issue 33
63.03 KB
6/4/2021
Electrode Mountings, Series 7777D Durafet II Electrode for In-line Tee Mounting, 51-52-16-61-Issue 20
42.23 KB
6/4/2021
Durafet and Meredian II Combination pH/ORP Electrodes for Honeywell 7777 Mountings Specification
202.05 KB
6/4/2021
Name
Description
File Size
Date
Size
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51205554-501
DURAFET II NPT 8550 VITON SMOO
51205554-501
DURAFET II NPT 8550 VITON SMOO
CCD
Contacting Conductivity Sensors
CCD
Contacting Conductivity Sensors
PHG-1
GLASS PH SENSOR
PHG-1
GLASS PH SENSOR
PHG-G
GLASS ORP SENSOR - GOLD
PHG-G
GLASS ORP SENSOR - GOLD
PHG-P
GLASS ORP SENSOR - PLATINUM
PHG-P
GLASS ORP SENSOR - PLATINUM