WEL Series | pH/ORP Electrodes0 pages

WEL Series | pH/ORP Electrodes
An Iwaki America Company
WEL SERIES pH/ORP ELECTRODES
Walchem’s WEL Series electrodes are cost-effective differential pH and
ORP electrodes for industrial applications. They are modular in design
with a rugged CPVC housing that contains the electronics; pH and ORP
cartridges can easily be connected or replaced in minutes without tools.
The cartridges feature a unique threaded interlock connection and a
double o-ring seal, ensuring a watertight fit and secure seating at all times.
The optional differential preamplifier and temperature compensation
element are in the housing, and are not thrown away when the electrode
needs replacement. The electrode is powered by the controller it is connected
to, so the signal is always preamplified and there are no batteries to go dead.
A titanium solution ground rod integral to the housing enables the differential
measuring technique. This results in prolonged electrode life and reliable
measurement, resistance to stray voltages and currents or ground loop
problems.
The electrode design enables a universal mounting style - a single
housing and cartridge can be mounted in-line or submersed. This
reduces inventory of parts and spares needed.
SUMMARY OF KEY BENEFITS
Differential preamp
Universal mounting
Easily replaceable electrode cartridges
Electronics are not discarded with the electrode
Optional ATC
Easy to install
Cartridge Styles:
• Flat Surface
• Bulb / Rod
• HF Resistant
Resistant to electronic noise, ground loops
CE Performance & Safety Certifications
The differential preamplifier and optional automatic
temperature compensation (ATC) element are built
into the housing, resulting in signal amplification at the
optimal location - right next to the sensor. Temperature
response is fast, increasing accuracy of measurement.
The titanium ground rod makes the differential
measurement technique possible and it is resistant
to aggressive chemistries.
The differential technology provides a longer
electrode life, a signal that is more immune to
electronic noise, high voltage potential in solution
and ground loops.
The preamp electronics are powered by the
controller it is attached to: the signal is always
preamplified, distance from the controller is not
critical (less than 1000 ft. is recommended) and
there is no concern about a battery going dead.
The electrode cartridge can be replaced without
also having to replace the preamp or ATC element.
Different styles are available to best fit your need:
flat surface design resists fouling; low cost bulb
version for less demanding applications; a fluorideresistant glass version for aggressive solutions.
The cartridge has a unique threaded interlock
connection which seats the electrode securely in
the housing. Knurled machining of the casing at
the surface end provides for
a sure grip when removing or
inserting a cartridge. The
design of the electrode
enables the unit to be
used in immersion or in-line
applications, reducing
required inventory.