LMI DC4000-11 Cooling Tower Conductivity Controller
$1,621.00
The LMI DC4000-11 Conductivity Controller from the Liquitron DC4000 Series provides automated conductivity monitoring and control for cooling towers and water treatment systems. It measures conductivity from 0–20,000 µS or 0–6,000 PPM/TDS and uses programmable set points to manage bleed and chemical feed operations.
This microprocessor-based controller features two relay outputs, a 16-character backlit LCD, and programmable chemical feed modes for flexible system control. It also supports flow switch and flow meter inputs, high and low alarms, and a 4–20 mA conductivity output for external monitoring. Designed for reliable water treatment control, the DC4000-11 is well suited for cooling towers and other compatible industrial water treatment applications.
Estimated Lead Time: 2–3 Weeks
Technical Specifications
| Specification | Details |
|---|---|
| Brand | LMI |
| Model | DC4000-11 |
| Series | Liquitron DC4000 Series |
| Product Type | Conductivity Controller |
| Primary Function | Conductivity Monitoring, Bleed Control, and Chemical Feed Control |
| Conductivity Range | 0–20,000 µS |
| PPM/TDS Range | 0–6,000 PPM/TDS |
| Display | 16-Character Backlit LCD |
| Control Outputs | 2 Relays |
| Relay Rating | 10 Amp at 115 VAC; 5 Amp at 230 VAC |
| Conductivity Input | 4-Pin Microphone Jack |
| Signal Inputs | Flow Meter and Flow Switch Connections |
| Signal Output | Non-Isolated 4–20 mA Conductivity Output |
| Alarm Functions | High and Low Alarm with Relay |
| Set Point Control | Rising or Falling, Selectable |
| Differential / Hysteresis | Keypad Adjustable |
| Feed Modes | Feed and Bleed, Percentage of Time, Percentage of Bleed, and External Trigger |
| Temperature Display | °C or °F |
| Programming | 3-Key User Interface |
| Power Input | 115 VAC or 230 VAC, 50/60 Hz |
| Enclosure | NEMA 12X Prewired; Suitable for NEMA 4X Applications When Hardwired |
| Housing Material | Flame-Retardant Molded TPE |
| Cover | Clear Molded Polycarbonate, Padlockable |
| Operating Temperature | 32–122°F (0–50°C) |
| Relative Humidity | 0–95%, Non-Condensing |
| Typical Applications | Cooling Towers and Compatible Industrial Water Treatment Systems |
Reliable Conductivity Control with the LMI DC4000-11
The LMI DC4000-11 conductivity controller provides automated conductivity monitoring and control for water treatment systems. It belongs to the Liquitron DC4000 Series and supports cooling tower, boiler, and closed-loop applications. As a result, operators can manage conductivity and connected treatment equipment from one controller.
The controller combines conductivity set point control with relay outputs and chemical feed timers. Therefore, it can help automate bleed and chemical feed functions based on programmed system conditions.
Conductivity Monitoring for Cooling Towers
The DC4000-11 cooling tower controller measures conductivity from 0–20,000 µS. It also provides a 0–6,000 PPM/TDS scale. In addition, the backlit LCD clearly displays system information for the operator.
This wide measurement range supports different water treatment requirements. For example, operators can monitor conductivity and adjust control settings through the controller interface.
Cooling Tower Bleed and Chemical Feed Control
The controller uses relay outputs to operate compatible water treatment equipment. As a result, it can coordinate bleed and chemical feed functions with programmed conductivity settings.
In addition, several timer options are available for chemical feed control. These options allow operators to select a feed method that matches the treatment program.
Multiple Programmable Feed Modes
The Liquitron DC4000 Series offers several chemical feed modes. For example, Feed Limit provides an adjustable operating time from 1 to 999 minutes.
Percentage of Time provides a 1–100 minute cycle with 1–100% on-time. Meanwhile, Percentage of Bleed can operate based on the previous bleed cycle. An External Trigger mode is also available for compatible applications.
Therefore, operators have several ways to coordinate chemical feed with system operation.
Two Relay Outputs for Equipment Control
The LMI conductivity controller includes two control relays for connected equipment. The relays are rated at 10 Amp at 115 VAC or 5 Amp at 230 VAC.
In addition, the controller is fused for a 10 Amp total load. These outputs provide the control needed for compatible bleed and chemical feed equipment.
Backlit LCD and Clear Status Indicators
The controller features a 16-character backlit LCD for easy viewing. In addition, LED indicators show power, control, alarm, no-flow, and feed status.
Temperature can also appear in either °C or °F. As a result, operators can quickly review important system information from the controller.
High and Low Conductivity Alarms
The DC4000-11 includes high and low conductivity alarm functions. Therefore, operators can receive a clear indication when conductivity reaches programmed limits.
The set point supports rising or falling operation. Moreover, operators can adjust the differential or hysteresis through the keypad.
Flow Switch and Flow Meter Connections
The controller supports connections for a flow switch and flow meter. In addition, a no-flow LED provides a clear visual status indicator.
This feature helps operators identify flow conditions that may affect treatment system operation.
4–20 mA Conductivity Output
The controller provides a standard 4–20 mA conductivity output for compatible monitoring or recording equipment. The output is non-isolated and spannable.
Therefore, conductivity data can be sent to compatible external equipment for additional system monitoring.
Simple Three-Key Programming
Programming the DC4000-11 cooling tower controller requires only three keys. The LCD provides information while operators review or change controller settings.
In addition, the keypad provides access to conductivity control settings, including differential or hysteresis adjustment. This simple interface helps make routine setup and operation easier.
Durable Enclosure for Water Treatment Systems
The controller uses a flame-retardant molded TPE housing and a clear polycarbonate cover. In addition, the cover can be secured with a padlock.
The prewired configuration uses a NEMA 12X enclosure. When properly hardwired, the unit is suitable for NEMA 4X applications. The operating temperature range is 32–122°F (0–50°C), with relative humidity from 0–95% non-condensing.
LMI DC4000-11 for Water Treatment Applications
The LMI DC4000-11 conductivity controller supports cooling towers, boilers, closed-loop systems, and other compatible water treatment applications. Overall, its conductivity monitoring, relay control, feed timers, alarms, and signal output provide a practical solution for automated water treatment control.
Available from Water Treatment Supply, the DC4000-11 provides the tools needed to manage conductivity, bleed operation, and compatible chemical feed equipment.
Specifications and Applications of the LMI DC4000-11 Controller
The LMI DC4000-11 conductivity controller combines conductivity measurement, relay-based equipment control, alarm functions, and programmable feed timers in a single water treatment controller. The DC4000 Series is designed for cooling tower, boiler, and closed-loop applications.
Use Cases & Industry Applications:
- Cooling Tower Water Treatment
The DC4000-11 cooling tower controller is designed for cooling tower applications requiring conductivity monitoring, bleed control, and chemical feed management.
- Cooling Tower Bleed Control
The cooling tower bleed controller provides conductivity set point control and relay outputs for controlling connected equipment as part of a bleed and feed treatment strategy.
- Boiler Water Treatment
The DC4000 Series is also designed for boiler applications and includes programmable boiler timer functions with interval, duration, and trap time settings.
- Closed-Loop Systems
The controller can be used in closed-loop water treatment systems where conductivity monitoring and controlled treatment functions are required.
- Conductivity Monitoring
The conductivity monitoring controller supports conductivity measurements from 0–20,000 µS or 0–6,000 PPM/TDS.
- Chemical Feed Management
The controller provides multiple programmable feed modes for controlling chemical addition according to treatment requirements.
Key Features & Benefits
- Microprocessor-Based Control: Provides an integrated platform for conductivity monitoring and water treatment control.
- Cooling Tower Application: Designed for cooling tower water treatment processes.
- Wide Conductivity Range: Supports 0–20,000 µS or 0–6,000 PPM/TDS.
- Two Relay Outputs: Provides control of connected treatment equipment.
- Multiple Feed Modes: Supports Feed Limit, Percentage of Time, Percentage of Bleed, and External Trigger.
- High and Low Alarms: Provides relay-based alarm functionality.
- 4–20 mA Output: Includes a standard conductivity recorder output.
- Flow Switch Compatibility: Supports flow switch connections and no-flow indication.
- Backlit LCD: Provides clear visibility of controller information.
- Temperature Display: Supports temperature display in °C or °F.
- Adjustable Differential: Allows hysteresis to be adjusted through the keypad.
- Selectable Set Point: Supports rising or falling set point operation.
- Three-Key Programming: Simplifies controller programming.
- Durable Housing: Uses flame-retardant molded TPE construction.
- Padlockable Cover: Uses a clear molded polycarbonate cover with padlock capability.
- Flexible Enclosure Configuration: Prewired units use NEMA 12X construction; hardwiring makes the unit suitable for NEMA 4X applications.
- Multiple Water Treatment Applications: Suitable for cooling tower controller, boilers, and closed-loop systems.
The DC4000 Series includes programmable feed timers, including Feed Limit, Percentage of Time, Percentage of Bleed, and External Trigger functions.
No replacement parts listed for this item yet.
FAQs
1. What is the LMI DC4000-11 conductivity controller used for?
The LMI DC4000-11 conductivity controller is used for conductivity monitoring and control in water treatment applications. The DC4000 Series is specifically designed for cooling towers, boilers, and closed-loop systems.
2. What is the conductivity range of the DC4000-11?
The controller supports a conductivity scale of 0–20,000 µS or 0–6,000 PPM/TDS.
3. Can the DC4000-11 control cooling tower bleed?
Yes. The controller provides a conductivity set point and relay control that can be used for cooling tower bleed applications. It also provides multiple timer functions for chemical addition.
4. How many relay outputs does the LMI conductivity controller have?
The DC4000 Series has two control relays. They are rated at 10 Amp at 115 VAC or 5 Amp at 230 VAC.
5. Does the DC4000-11 have a digital display?
Yes. The controller uses a 16-character backlit LCD and LED indicators for power, control, alarm, no-flow, and feed status.
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