Ordering Guide

_{Source: Intuition-6 Brochure, Pages: 5–6} The Intuition-6 model code specifies the controller configuration, relay types, sensor inputs, and included sensors. Use this guide to build the correct model number for your application.

Model Code Structure

WCT6 - A00 - P - AA - A - M - P - ABNN
│      │     │   │    │   │   │   └── Sensors (4 characters)
│      │     │   │    │   │   └────── Sensor Mounting
│      │     │   │    │   └────────── Ethernet Option
│      │     │   │    └────────────── Analog Outputs
│      │     │   └─────────────────── Input Boards (2 characters)
│      │     └─────────────────────── Power Cord
│      └───────────────────────────── Relays/Wiring
└──────────────────────────────────── Base Model (Application)

Base Model Selection

Choose the base model that matches your primary application:

Model	Application	Description
WCT6	Cooling Tower	Conductivity blowdown, inhibitor feed, biocide timers
WBL6	Boiler	Blowdown control, condensate monitoring, high-temp sensors
WDS6	Disinfection	Amperometric sensors for chlorine, ClO₂, ozone, PAA
WPH6	pH Control	pH/ORP measurement and control
WCN6	Conductivity	General conductivity monitoring and control
WPD6	Pyxis Oxidizer + pH	Fluorometer-based oxidizer with pH monitoring

All base models use the same controller hardware. The model designation determines available sensor packages and pre-configured control algorithms.

Relays and Wiring

Code	Description
000	6 powered relays
100	2 powered + 4 dry contact relays
200	2 opto + 4 dry contact relays
400	4 opto + 2 dry contact relays
A00	6 powered relays with USA pigtails prewired
B00	2 powered relays with USA pigtails prewired + 4 dry contact
C00	2 opto relays with 20 ft pulse cables + 4 dry contact
D00	4 opto relays with 20 ft pulse cables + 2 dry contact

Prewired options (A00, B00, C00, D00) simplify installation. Opto relay outputs are required for pulse proportional and PID control modes.

Power Cord

Code	Description
P	USA power cord
D	DIN power cord (European)
B	Brazil power cord
H	Hardwired (no power cord)

Input Boards

Select two input board codes in alphabetical order (e.g., “AA”, “AB”, “BC”):

Code	Description
A	One sensor input board (conductivity, pH/ORP, disinfection)
B	One dual analog input board (two 4-20 mA channels)
C	One combination sensor + analog input board
N	No sensor input board

Electrodeless conductivity sensors require the “A” sensor input board and will not work with the “C” combination board.

Common Configurations:

Code	Configuration
AA	Two sensor inputs (e.g., conductivity + pH)
AB	One sensor + two analog inputs (e.g., conductivity + fluorometer)
BB	Four analog inputs
CC	Two combination boards (two sensors + two analog)
AN	One sensor input only

Analog Outputs

Code	Description
N	No analog outputs
A	One dual isolated 4-20 mA output card

Ethernet Option

Code	Description
N	No Ethernet
E	Ethernet board (web access, email alerts)
M	Ethernet board with Modbus TCP + BACnet

Sensor Mounting

Mounting options vary by base model:

WCT6 / WPH6
WDS6
WCN6
WPD6
WBL6

Code	Description
N	No flow switch, no mounting hardware, no sensors
S	Submersion sensors, 20 ft cables (no flow switch)
I	Inline sensors, 20 ft cables (no flow switch)
L	Loose flow switch manifold, 20 ft cables, low pressure
P	Flow switch manifold on panel, 3 ft cables, low pressure
F	Loose flow switch manifold, 4 ft cable, high pressure
H	Flow switch manifold on panel, 4 ft cables, high pressure

Code	Description
N	No flow switch, no mounting hardware, no sensors
I	Inline sensors, 20 ft cables (no flow switch)
L	Loose flow switch manifold, 20 ft cables, low pressure
P	Flow switch manifold on panel, 3 ft cables, low pressure

Code	Description
N	No flow switch, no mounting hardware, no sensors
C	Clean water reservoir on panel
D	Industrial water 115V self-cleaning flow reservoir on panel
E	Industrial water 230V self-cleaning flow reservoir on panel

Sensor Selection

Select sensor codes based on your base model. Choose the specified number of characters in alphabetical order, with “N” (no sensor) last if fewer sensors are needed.

Choose 4 codes in alphabetical order (except N last)

Code	Sensor
A	Graphite contacting conductivity
B	316SS contacting conductivity
C	Electrodeless conductivity
D	High pressure contacting conductivity
E	Graphite conductivity for makeup water (threaded adapter)
F	Flat surface WEL pH, no ATC
G	High pressure pH, no ATC
H	Rod style WEL ORP
I	Flat surface WEL ORP
J	High pressure ORP
K	Free chlorine, 20 ppm, extended pH range membrane
L	Chlorine dioxide 0-20 ppm membrane
M	Little Dipper 2, 0-200 ppb PTSA (analog)
N	No sensor
P	Pyxis PTSA (analog)
S	Disinfection membrane, no sensor
T	Pyxis Tagged Polymer (analog)
U	Pyxis PTSA + Tagged Polymer (2 analog)
V	Flat surface WEL pH, 4-20 mA (analog)
W	Rod style WEL ORP, 4-20 mA (analog)
X	Flat surface WEL ORP, 4-20 mA (analog)

Dipper, Pyxis, chlorine, ClO₂, and disinfection sensors are not available with submersion mounting. Electrodeless conductivity requires “A” sensor input board.

Choose 2 codes in alphabetical order

Code	Sensor
A	Free chlorine, 0-20 ppm
B	Chlorine dioxide, 0-20 ppm
C	Ozone, 0-20 ppm
D	Peracetic acid (PAA), 0-2000 ppm
E	Extended pH range free chlorine, 0-20 ppm
F	Total chlorine, 0-20 ppm
G	Hydrogen peroxide, 0-2000 ppm
H	Stabilized bromine, 0-20 ppm
I	Chlorite, 0-2 ppm
J	Chlorine (absence detection), 0-2 ppm
N	No sensor
X	Disinfection manifold + pH/ORP/conductivity tee

Choose 4 codes in alphabetical order

Code	Sensor
A	External pH/ORP preamplifier, no sensor
B	Flat surface WEL pH with Pt1000 ATC
C	Flat surface WEL pH, no ATC
D	Rod style WEL ORP
E	Flat surface WEL ORP
F	Flat surface WEL pH, 4-20 mA
G	Rod style WEL ORP, 4-20 mA
H	Flat surface WEL ORP, 4-20 mA
N	No sensor
X	Dual low pressure manifold

Choose 2 codes in alphabetical order

Code	Sensor
A	Boiler sensor with ATC, 250 psi, 1.0 cell, 20 ft cable
B	Boiler sensor without ATC, 250 psi, 1.0 cell, 20 ft cable
C	Condensate sensor with ATC, 200 psi, 0.1 cell, 10 ft cable
D	Boiler sensor with ATC, 250 psi, 10 cell, 20 ft cable
N	No sensor

Choose 2 codes in alphabetical order

Code	Sensor
A	PEEK electrodeless conductivity, 20 ft cable
B	CPVC electrodeless conductivity, 20 ft cable
C	Contacting conductivity, 1.0 cell, 100 psi, 10 ft
D	Contacting conductivity, 0.1 cell, 100 psi, 10 ft
E	Contacting conductivity, 10.0 cell, 100 psi, 10 ft
F	Contacting conductivity, 0.01 cell, 100 psi, 10 ft
G	Contacting conductivity, 1.0 cell, 200 psi, 10 ft
H	Contacting conductivity, 0.1 cell, 200 psi, 10 ft
I	Contacting conductivity, 10.0 cell, 200 psi, 10 ft
J	Contacting conductivity, 0.01 cell, 200 psi, 10 ft
N	No sensor

Electrodeless sensors (A, B) require “A” sensor input board — not compatible with “C” combination board.

Code	Sensor
A	Free chlorine (2 analog)
B	Chlorine dioxide (2 analog)
N	No sensor

Example Model Codes

Model Code	Description
WCT6-A00-P-AA-N-M-P-ABNN	Cooling tower: 6 powered relays prewired, USA cord, 2 sensor inputs, Ethernet+Modbus, panel-mount low pressure manifold, graphite cond + SS cond
WBL6-000-H-AA-A-E-AN	Boiler: 6 powered relays hardwired, 2 sensor inputs, dual analog out, Ethernet, boiler sensor with ATC
WDS6-C00-P-AC-N-M-P-AB	Disinfection: 2 opto + 4 dry, USA cord, sensor + combo board, Ethernet+Modbus, panel manifold, free chlorine + ClO₂
WPH6-A00-P-AA-N-E-I-BCNN	pH control: 6 powered prewired, 2 sensor inputs, Ethernet, inline sensors, flat pH + flat pH no ATC

Compatible Accessories

For flow switches, sample panels, and additional sensors, see the Walchem accessories catalog or contact your distributor.

Sensors

Sensor pressure/temperature ratings and materials

Specifications

Full electrical and mechanical specifications

Sources

Intuition-6 Brochure

Pages 5–6

Get Started

Product Support

Ordering Guide

Ordering Guide

Model Code Structure

Base Model Selection

Relays and Wiring

Power Cord

Input Boards

Analog Outputs

Ethernet Option

Sensor Mounting

Sensor Selection

Example Model Codes

Compatible Accessories

Sensors

Specifications

Sources

Intuition-6 Brochure

Code	Description
N	No flow switch, no mounting hardware, no sensors
S	Submersion sensors (no flow switch)
I	Inline sensors (no flow switch)

​Ordering Guide

​Model Code Structure

​Base Model Selection

​Relays and Wiring

​Power Cord

​Input Boards

​Analog Outputs

​Ethernet Option

​Sensor Mounting

​Sensor Selection

​Example Model Codes

​Compatible Accessories

Sensors

Specifications

​Sources

Intuition-6 Brochure

Ordering Guide

Model Code Structure

Base Model Selection

Relays and Wiring

Power Cord

Input Boards

Analog Outputs

Ethernet Option

Sensor Mounting

Sensor Selection

Example Model Codes

Compatible Accessories

Sources