美国Walchem WEL系列 pH/ORP 电极

Overview
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 which 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.