Liquid Level Probe Relay Module DC 12-24V Water Tank Controller
Liquid Level Probe Relay Module DC 12-24V Water Tank Controller
Single Channel Liquid Level Probe Relay Module – DC 12–24V Water Tank Pump Controller
Take full control of your water management system with this versatile Single Channel Liquid Level Probe Relay Module. Designed for DC 12–24V operation, this compact controller automatically manages your water tank pump in both drainage and replenishment modes — making it ideal for aquariums, irrigation systems, sump tanks, industrial reservoirs, and home water storage setups.
Made in Mainland China.
Key Features
- Dual Operating Modes: Switch between Drainage Mode and Replenishment Mode to suit your specific application.
- Adjustable Delay Timer: Fine-tune the relay delay period so your pump operates exactly when — and for as long — as you need.
- Wide Voltage Range: Compatible with DC 12V to 24V power supplies for flexible installation across a range of systems.
- Probe-Based Liquid Detection: Instantly detects the presence or absence of water at the probe tip, triggering the relay with precision.
- Single Channel Design: Simple, focused control for one pump or device — easy to integrate and configure.
- Low Voltage Safety: Operates below 50Vac / 75Vdc, meeting EU LVD low-voltage safety standards.
- Compact & Durable: Lightweight module form factor designed for easy mounting in control panels or enclosures.
How It Works
Drainage Mode
The relay activates as soon as the probe detects water. It continues to run until the probe is no longer submerged. Once out of the water, the configurable delay timer begins counting down — and when the delay expires, the relay deactivates, stopping the pump.
Replenishment Mode
The relay activates the moment the probe detects a dry (no-water) state. It continues running until water reaches the probe again. Once water is detected, the delay timer begins, and after the set delay, the relay shuts off — preventing overfill.
Specifications
| Operating Voltage | DC 12V – 24V |
| Number of Channels | 1 (Single Channel) |
| Operating Modes | Drainage / Replenishment (switchable) |
| Delay | Adjustable |
| Voltage Safety Class | Low voltage — Below 50Vac or 75Vdc |
| High-Concern Chemicals | None |
Package Includes
- 1× Water Level Controller Relay Module
Note: Due to lighting and screen differences, the item's color may appear slightly different from the photos. Please allow a 1mm–1cm variance due to manual measurement.
For more information on electrical safety standards for low-voltage devices, visit the U.S. Consumer Product Safety Commission (CPSC).
Frequently Asked Questions
Q: What is the operating voltage range for this liquid level relay module?
A: This water level controller relay module operates on DC 12V to 24V, making it compatible with a wide range of standard power supplies used in home, garden, and light industrial applications.
Q: What is the difference between Drainage Mode and Replenishment Mode on this relay module?
A: In Drainage Mode, the relay turns on when the probe detects water and turns off (after the set delay) once the probe is no longer submerged — ideal for emptying a tank. In Replenishment Mode, the relay activates when the probe is dry and shuts off (after the delay) once water is detected again — perfect for automatically refilling a tank to the desired level.
Q: Can I adjust the delay time on this water level controller?
A: Yes. The delay period is fully adjustable, allowing you to customize how long the relay continues to operate after the water condition changes. This helps prevent pump short-cycling and gives you precise control over your water management system.
Q: What types of applications is this liquid level probe relay module suitable for?
A: This module is well-suited for water tanks, sump pumps, aquariums, garden irrigation systems, industrial fluid reservoirs, rainwater collection systems, and any other DC-powered liquid level monitoring and control application.