WEL Series | pH/ORP Electrodes
2Pages

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.

ORDER INFORMATION SUBMERSION Installation with Preamplified Housing WEL cartridge 20 FT CABLE housing mounting style CONTROLLER OR 190851 TERMINAL BOX CARTRIDGE PHF = Flat surface pH PHB = Bulb pH PHH = HF resistant pH MVF = Flat surface ORP MVR = Rod style ORP PHLI = Flat pH, if sample is between 10 and 100μS HOUSING 1 = Housing with preamplifier and PT1000 ATC, 20’ cable with tinned leads 2 = Housing with preamplifier, 20’ cable with tinned leads 3 = Housing with PT1000 ATC, 20’ coaxial cable with BNC connector 4 = Housing, 20’ coaxial cable with BNC connector MOUNTING STYLE 1 =...