Eletechsup Liquid Level Control Modules: Model Comparison and Selection Guide
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1. Overview
Eletechsup offers a range of liquid-level detection and water-pump control modules for applications ranging from small aquariums and DIY electronics projects to household water tanks and larger water-management systems.
Although these products share a common purpose, they differ in their control functions, number of sensing points, power supply requirements, output capabilities, and intended applications.
The following guide compares six models to help customers select the right solution for their projects.
2. Model Comparison Table
| Model | Main Function | Power Supply | Level Detection | Pump Control | Best Suited For |
|---|---|---|---|---|---|
| NC25C01 | Automatic filling and drainage | DC 5V / 12V versions | Upper and lower level probes | Yes, relay output rated up to 10A under specified conditions | DIY projects, water tanks, aquariums |
| LC25A01 | Automatic water supply control | Check the selected version | Water-level sensing | Yes, for compatible pump or valve control | Small water systems and aquariums |
| LC35D01 | Automatic pump start/stop control | DC 12V / 24V or AC 85–265V version | Upper and lower level probes | Yes, relay rated up to 30A under specified conditions | Water towers, pools, farms and larger pump systems |
| LC1BD04 | Four-level water-level detection | DC 5V | Four sensing levels | Not a dedicated high-power pump relay controller | Arduino projects, level indication |
| LC4BE08 | Eight-level detection and digital display | DC 5V | Eight sensing levels | No dedicated high-power pump relay | MCU projects, aquarium monitoring and automation |
| LC5BF08 | Eight-level detection, display and pump control | DC 12V | Eight sensing levels | Yes, relay rated up to 30A under specified conditions | Multi-level tank monitoring and automatic water supply |
Specifications are based on the available product listings. Actual ratings depend on the selected version, load type and operating conditions. <Cite refs={["turn208195search0","turn208195search1","turn208195search2","turn208195search3","turn208195search8","turn208195search9"]} />
3. Detailed Model Comparison
NC25C01 — Compact Automatic Water-Level Controller
The NC25C01 is a compact and economical solution for basic automatic water-level control.
Key features
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Available in DC 5V and 12V versions.
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Uses upper and lower level probes to control water filling or drainage.
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Integrated relay output with a listed maximum rating of 10A under specified conditions.
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Compact board measuring approximately 44 × 29 × 18 mm.
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Probes can be made using suitable wires; dedicated probes are not included in the standard listing.
Recommended applications: Home water tanks, fish tanks, automatic water-changing systems, and DIY water-control projects.
Main advantage: A small, affordable controller for straightforward water-level automation. <Cite refs={["turn208195search0","turn208195search6"]} />
LC25A01 — Automatic Water Supply Controller
The LC25A01 is aimed at automatic water-supply applications, particularly smaller systems such as aquariums and water tanks.
Recommended applications
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Automatic aquarium water replenishment.
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Small water tanks.
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Water-level-triggered pump or solenoid-valve control.
Main advantage: A purpose-oriented option for customers who need automatic water supply rather than a separate multi-level monitoring system.
Check the exact version's wiring, voltage and switching specifications before comparing it directly with the NC25C01.
LC35D01 — Higher-Capacity Automatic Pump Controller
Product link: https://eletee.com/products/products-lc35d01-water-level-controller
The LC35D01 is designed for applications requiring a more substantial pump-control solution.
Key features
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Available in DC 12V, DC 24V and AC 85–265V versions.
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Automatic pump start/stop according to upper and lower water-level thresholds.
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Listed relay rating of up to 30A under specified conditions.
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Recommended LCCAB01 stainless-steel water-level probes, available in different cable lengths.
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Board size approximately 80 × 50 × 31 mm.
Recommended applications: Water towers, swimming pools, agricultural water systems and suitable larger pump installations.
Main advantage: Multiple power-supply options and a higher stated relay rating than the NC25C01.
The 30A figure is a maximum listed contact rating, not a guarantee that every 30A motor can be switched directly. Motor starting current, load type and the specific voltage rating must be checked. The sensor probes are sold separately. <Cite refs={["turn208195search1"]} />
LC1BD04 — Four-Level Water-Level Detection Module
The LC1BD04 is a simple detection module for projects that need to identify several water levels.
Key features
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DC 5V supply.
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Four water-level sensing points.
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Intended for low-voltage electronic monitoring and control projects.
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Suitable for integration with microcontrollers when the electrical interfaces are compatible.
Recommended applications: Arduino-based projects, basic water-level indicators and small monitoring systems.
Main advantage: Straightforward multi-level detection without the need for a dedicated high-power pump relay.
For automatic pump switching, an appropriate external relay or driver may be required. <Cite refs={["turn208195search9"]} />
LC4BE08 — Eight-Level Detection and Digital Display Module
The LC4BE08 expands basic water-level detection to eight sensing points and includes a digital display.
Key features
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DC 5V supply.
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Eight water-level sensor inputs.
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Eight corresponding logic-level output interfaces.
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Digital display indicating levels from 0 to 8.
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Compact board measuring approximately 48 × 33 × 12 mm.
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Designed for use with compatible microcontrollers, including Arduino-family boards.
Recommended applications: Aquarium monitoring, water-level visualization, Arduino experiments and custom automation systems.
Main advantage: More detailed level information and multiple logic outputs for a microcontroller to process.
Unlike a dedicated pump controller, the LC4BE08 does not provide a high-power pump relay output. A compatible external driver or relay is needed when controlling a pump. <Cite refs={["turn208195search2","turn208195search3"]} />
LC5BF08 — Eight-Level Display and Automatic Pump Controller
Product link: https://eletechsup.com/products/lc5bf08-dc-12v-8-digital-water-level-indicator-liquid-sensor-automatic-water-supply
The LC5BF08 combines multi-level detection, digital indication and relay-based pump control in one module.
Key features
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DC 12V supply.
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Eight-level digital display, indicating levels from 0 to 8.
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Adjustable relay switching levels from 1 to 8.
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Listed relay rating of up to 30A under specified conditions.
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Board size approximately 77 × 70 × 26 mm.
Recommended applications: Water tanks requiring multiple switching thresholds, automatic water supply, and projects where users want both a level display and pump control.
Main advantage: Combines level monitoring and automatic switching, reducing the need to combine a separate indicator board with a separate control module.
The standard listing does not include the probe wires. Confirm the desired filling or drainage logic and the electrical requirements of the pump before installation. <Cite refs={["turn208195search8"]} />
4. Which Model Should You Choose?
| Customer Requirement | Suggested Model |
|---|---|
| Low-cost, basic automatic filling or drainage | NC25C01 |
| Automatic water supply for a small aquarium or tank | LC25A01 |
| Higher-capacity pump-control application | LC35D01 |
| Simple four-level detection | LC1BD04 |
| Eight-level detection with display and MCU outputs | LC4BE08 |
| Eight-level display with integrated pump switching | LC5BF08 |
5. Why Are Multiple Liquid-Level Controller Models Needed?
Different projects require different levels of control complexity.
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DIY users often prefer compact, affordable boards that are easy to integrate.
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Aquarium owners may prioritize automatic replenishment and water-changing functions.
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Homeowners and farmers may need a dedicated controller for filling or draining tanks.
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Automation developers may require multiple sensing points and logic-level outputs for custom control.
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System integrators may prefer a module combining a level display and relay switching.
Offering different models allows customers to choose according to their actual requirements rather than paying for functions they do not need.
6. Conclusion
Eletechsup's liquid-level product range covers three main categories: basic automatic