> ## Documentation Index
> Fetch the complete documentation index at: https://docs.supplyline.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Specifications
> Technical specifications for the Walchem Intuition-6 water treatment controller
# Specifications
Source: [Intuition-6 Instruction Manual Rev. H](https://supplyline.com/assets/wal/WAL-IOM_Intuition-6-Instruction-Manual-RevH.pdf), Pages: 3–10
## Measurement Performance
Use these tables to confirm sensor ranges and accuracy.
### Contacting Conductivity
| Cell Constant | Range | Resolution | Accuracy |
| ------------- | --------------- | ---------- | ---------------------------- |
| 0.01 | 0-300 µS/cm | 0.01 µS/cm | ±1% of reading or 0.01 µS/cm |
| 0.1 | 0-3,000 µS/cm | 0.1 µS/cm | ±1% of reading or 0.1 µS/cm |
| 1.0 | 0-30,000 µS/cm | 1 µS/cm | ±1% of reading or 1 µS/cm |
| 10.0 | 0-300,000 µS/cm | 10 µS/cm | ±1% of reading or 10 µS/cm |
### Electrodeless Conductivity
| Range | Resolution | Accuracy |
| ----------------------- | ---------- | -------------- |
| 500-12,000 µS/cm | 1 µS/cm | ±1% of reading |
| 3,000-40,000 µS/cm | 1 µS/cm | ±1% of reading |
| 10,000-150,000 µS/cm | 10 µS/cm | ±1% of reading |
| 50,000-500,000 µS/cm | 10 µS/cm | ±1% of reading |
| 200,000-2,000,000 µS/cm | 100 µS/cm | ±1% of reading |
Conductivity ranges apply at 25°C. At higher temperatures, the effective range is reduced. For example, at 100°C the range is approximately 36% of the 25°C value.
### pH Measurement
| Parameter | Value |
| ---------- | ----------------- |
| Range | -2 to 16 pH units |
| Resolution | 0.01 pH units |
| Accuracy | ±0.01% of reading |
### ORP Measurement
| Parameter | Value |
| ---------- | ---------------- |
| Range | -1500 to 1500 mV |
| Resolution | 0.1 mV |
| Accuracy | ±1 mV |
### Disinfection Sensors
| Parameter | Value |
| --------------- | ------------------------------------------ |
| Range (mV) | -2000 to 1500 mV |
| Resolution (mV) | 0.1 mV |
| Accuracy (mV) | ±1 mV |
| Range (ppm) | 0-2 ppm to 0-20,000 ppm (sensor dependent) |
### Temperature Measurement
| Sensor Type | Range | Resolution | Accuracy |
| ------------------- | ---------------------- | ---------- | ------------- |
| 100Ω RTD | 23-500°F (-5 to 260°C) | 0.1°F | ±1% or ±1°C |
| 1000Ω RTD | 23-500°F (-5 to 260°C) | 0.1°F | ±1% or ±0.3°C |
| 10K/100K Thermistor | 23-194°F (-5 to 90°C) | 0.1°F | ±1% or ±0.3°C |
### Analog Input (4-20 mA)
| Parameter | Value |
| ---------- | ---------------- |
| Range | 0-22 mA |
| Resolution | 0.01 mA |
| Accuracy | ±0.5% of reading |
## Electrical Specifications
Review power and wiring requirements before installation.
### Power Supply
| Parameter | Value |
| --------------- | ---------------- |
| Input Voltage | 100-240 VAC ±10% |
| Frequency | 50/60 Hz |
| Maximum Current | 7 A |
| Fuse | 6.3 A |
### Sensor Inputs
| Input Type | Specification |
| -------------------------- | ------------------------------------------------ |
| Contacting Conductivity | 0.01, 0.1, 1.0, or 10.0 cell constant |
| Electrodeless Conductivity | Dedicated sensor card required |
| pH/ORP/ISE | Requires preamplified signal (WEL or WDS series) |
| Temperature | 100Ω or 1000Ω RTD, 10K or 100K thermistor |
| 4-20 mA Analog | 2, 3, or 4-wire transmitters supported |
### Analog Input Power Budget
Each 4-20 mA input channel provides isolated 24 VDC ±15% power:
* Maximum 2.0 W (83 mA) per channel
* Total power consumption limited based on ambient temperature
| Total Watts (All Channels) | Maximum Ambient Temperature |
| -------------------------- | --------------------------- |
| 2 W | 50°C (122°F) |
| 4 W | 45°C (113°F) |
| 6 W | 40°C (104°F) |
| 8 W | 35°C (95°F) |
### Digital Inputs
The controller provides six digital input channels:
| Input Type | Specification |
| ------------------ | --------------------------------------------------- |
| State-Type | Optically isolated, 9 VDC, 2.3 mA, \<2 sec response |
| Low Speed Counter | 0-20 Hz, 25 ms minimum pulse width |
| High Speed Counter | 0-500 Hz, 1.0 ms minimum pulse width |
Total available 9 VDC power: 111 mA across all digital inputs.
### Relay Outputs
| Output Type | Rating |
| ----------------------------- | -------------------------------------------- |
| Powered Mechanical Relays | 6 A resistive, 1/8 HP (93 W), fused as group |
| Dry Contact Mechanical Relays | 6 A resistive, 1/8 HP (93 W), not fused |
| Pulse Solid State Opto | 200 mA, 40 VDC max |
Pulse output accuracy:
* 0-10 Hz: ±0.5% of pulse rate
* 10-20 Hz: ±1.0%
* 20-40 Hz: ±2.0%
### Analog Outputs (Optional)
| Parameter | Value |
| ---------- | --------------------------- |
| Type | 4-20 mA, internally powered |
| Isolation | Fully isolated |
| Load | 600 Ω maximum resistive |
| Resolution | 0.0015% of span |
### Communication
| Interface | Specification |
| --------- | ---------------------------------------------- |
| Ethernet | 10/100 802.3-2005, Auto MDIX, Auto Negotiation |
| USB | Type A, High speed (480 Mbit), 0.5 A max |
| Protocols | Modbus TCP, BACnet (optional) |
## Mechanical Specifications
| Parameter | Value |
| ------------------ | ------------------------------------------------------ |
| Enclosure Material | Polycarbonate |
| Enclosure Rating | UL 50 Type 4X, IP66 |
| Dimensions | 11.1" x 8.3" x 5.5" (282 x 211 x 140 mm) |
| Display | 5" TFT color, 800 x 480 pixels, capacitive touchscreen |
| Weight | Approximately 5 lbs (2.3 kg) |
### Environmental
| Parameter | Value |
| --------------------- | ---------------------------------------------- |
| Operating Temperature | -4 to 131°F (-20 to 55°C) |
| Storage Temperature | -4 to 176°F (-20 to 80°C) |
| Humidity | 10-90% non-condensing |
| Altitude | 2000 m (6560 ft) maximum |
| Pollution Degree | 2 |
| Overvoltage Category | II |
| Installation | Indoor and outdoor, suitable for wet locations |
### Mounting Clearances
| Side | Clearance Required |
| ------ | ------------------------------------------------ |
| Top | 2" (50 mm) |
| Left | 8" (203 mm) — not applicable for prewired models |
| Right | 4" (102 mm) |
| Bottom | 7" (178 mm) |
## Agency Approvals
Use this section for compliance and certification references.
### Safety
* UL 61010-1:2012 3rd Ed + Rev:2019
* CSA C22.2 No. 61010-1:2012 3rd Ed. + U1; U2
* IEC 61010-1:2010 3rd Ed. + A1:2016
* EN 61010-1:2010 3rd Ed. + A1:2019
### EMC
* IEC 61326-1:2020
* EN 61326-1:2013
For EN 61000-4-3 Radiated RF Immunity, the controller meets Performance Criteria B. In environments with severe radio-frequency interference, the controller may reboot. Relocate the controller away from EMI sources if this occurs.
## Sensor Specifications
Reference these limits when selecting sensor materials and fittings.
### Pressure and Temperature Ratings
| Sensor Type | Max Pressure | Max Temperature | Materials |
| -------------------------------- | ------------ | ------------------------ | -------------------------- |
| Electrodeless Conductivity | 150 psi | CPVC: 158°F, PEEK: 190°F | CPVC or PEEK, FKM o-ring |
| pH | 100 psi | 158°F | CPVC, Glass, FKM, HDPE |
| ORP | 100 psi | 158°F | CPVC, Glass, FKM |
| Contacting Cond. (Cooling Tower) | 150 psi | 158°F | Graphite or 316SS, PP |
| Contacting Cond. (Boiler) | 250 psi | 401°F | 316SS, PEEK |
| Contacting Cond. (High Pressure) | 300 psi | 158°F | 316SS, PEEK |
| High Pressure pH/ORP | 300 psi | 275°F | Glass/Platinum, 316SS, FKM |
| Disinfection Sensors | 14.7 psi | 113-131°F | PVC, Polycarbonate, PEEK |
Pressure ratings decrease with increasing temperature. Always verify sensor compatibility with your process conditions using the pressure/temperature derating curves in the full manual.
## Battery
| Parameter | Value |
| --------- | ---------------------------- |
| Type | BR2032, 3V Lithium Coin Cell |
| Size | 20 mm diameter |
| Function | Real-time clock backup |
## Sources
Pages 3–10 • February 2024