Honeywell MagneW 3000 Plus - Application Assistance and Support

1/98 MagneW 3000 PLUS Specification and Application Guide 13
Table 4—Characteristics of Wet Contact Materials, continued
Material Main Component Characteristics Recommended Environment
Electrode Materials (continued)
Tantalum For Teflon PFA
lining:
Ta : >99.5%
For ceramic use:
Ta : 90%
W : 10%
Resistant to corrosion in strongly
oxidizing and reducing atmospheres,
but unusable in alkalis, fluorides, and
fuming sulfuric acid.
Because an insulating film may form on
these electrodes, pay special attention
to process conditions when selecting
this material.
(The empty-detection function of the
converter cannot be used.)
Concentrated hydrochloric acid, sulfuric
acid, nitric acid, aqua regia, etc.
Platinum-iridium alloy Pt : 90%
Ir : 10%
Resistant to corrosion in almost all
acids and alkalis except for aqua regia
and ammonium salts. Very expensive.
Phosphoric acid, nitric acid, fluoric acid,
hydrochloric acid, sulfuric acid, alkalis,
etc.
Tungsten carbide Highly abrasion-resistant and causes
less slurry noise. Cannot be used for
corrosive fluids.
Cement slurry, muddy slurry, filthy
slurry, earth/sand slurry, etc.
Nickel Highly corrosion-resistant against
strong alkali fluids, especially against
caustic soda and fluoric acid as
compared with corrosion resistances of
other metals.
Caustic soda, fluoric acid, alkali fluids,
etc.
Zirconium Corrosion-resistant against various
chemicals, especially against sulfides.
Copper sulfide, formic acid, potassium
hydroxide, etc.
Application Assistance
While the technical information provided in this guide is usually adequate for
sizing a meter for a particular application, Honeywell has Application Assistance
available. An Application Data Sheet (36-KI-08-01) is included at the end of this
document. When completed it provides the information necessary for a thorough
review by our Field Instrument Application Engineers. Using your application and
installation information, process fluid data, and cost and operation objectives,
these engineers will apply their wide industry experiences and various application
software programs to assist in determining the most cost-effective flow solution
available. To use this Honeywell service, please complete the Application Data
Sheet and forward it to your Honeywell Representative for submission to Field
Instrument Application Engineering.