WECT/ WEDT 400 series electrodeless (toroidal) cooling tower controllers
The WECT400/410 Cooling Tower Controllers with electrodeless (toroidal) conductivity sensors represent the latest in technological and innovative advancements from Walchem. The electrodeless sensor is impervious to contamination by oils, scale, biofilm, or other coatings, resulting in a low maintenance system that provides reliable, effective control. All of the standard features you’d expect in a conventional cooling tower controller are included, plus optional simple-to-use information management tools that enable water treatment professionals to deliver more effective service. The WECT400/410 controllers have the ability to store conductivity and temperature values, water usage, relay and flow switch status, and user settings. A USB stick is all that’s needed to extract the information. Download logs from the USB stick to a PC at your convenience, or copy your preferred treatment program to another controller to speed start-up.

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WECT400 feed & bleed cooling tower controller
Four chemical feed options • feed & bleed, with or without feed lockout timer • feed after bleed has finished, as a percentage of time • feed as a percentage of time elapsed • feed as a percentage of make-up water
• software, electronics, and sensor are constantly monitored without having to take controller offline
• electrodeless conductivity sensor: temperature compensation, CPVC construction & can be in-line or submersion
• optional isolated 4-20mA output proportional to the conductivity reading
• optional integrated flow switch manifold may be panel mounted for quick, professional installation with only two
• process connections
• accommodates a wide range of contacting and Hall Effect water meters
• optional USB flashstick support for data logs, event/relay and reset logs, and user configuration file import/ export

WECT410 feed & bleed cooling tower controller with dual biocide timers
All the features of the 400 with additional programmable dual biocide timers
• choice of 1, 7, 14, or 28-day cycles
• able to: add a single biocide at any time or dual alternating biocides, or dual independent biocides
• alarm output relay triggered by low conductivity, high conductivity, no-flow conditions, bleed timeout, sensor error and temperature
• error

WEDT400/ 410 feed & bleed cooling tower controller

As per the WECT400/410 series but with the addition of pH or ORP control
• choice of pH or ORP sensor for control of acid, chlorine/ bromine addition