DC 12V 30A 8-Level Water Level Controller Relay & Liquid Sensor
DC 12V 30A 8-Level Water Level Controller Relay & Liquid Sensor
DC 12V 30A 8-Level Automatic Water Level Controller Relay
Take full control of your water management system with this compact yet powerful DC 12V 30A Multi-function Water Level Controller Relay. Featuring an 8-level digital tube display and adjustable relay trigger points, this controller automates water supply, pumping, and liquid management for a wide range of residential, agricultural, and aquatic applications — all without the need for a dedicated probe (standard household wire works perfectly).
Made in Mainland China.
Key Features
- 8-Level Digital Display: Clearly shows real-time liquid level from 0–8 for instant monitoring.
- Adjustable Trigger Points: Set relay ON/OFF activation at any of 8 levels to match your specific setup.
- High Relay Load Capacity: Handles up to 30A/250VAC or 30A/30VDC — suitable for pumps, solenoid valves, and motors.
- Low Power Draw: Only 45mA (relay OFF) or 120mA (relay ON) — energy-efficient operation.
- No Dedicated Probe Needed: Use standard household wire as a probe, saving cost and simplifying installation.
- Compact & Lightweight: Measures just 77 × 70 × 26 mm and weighs only 75 g — easy to mount anywhere.
- Versatile Interface: VCC/GND power inputs, 8 level probe ports (Level 1–8), COM, and NO relay contacts for flexible wiring.
Specifications
| Working Voltage | DC 12V |
| Working Current | Relay OFF: 45mA | Relay ON: 120mA |
| Display | Digital Tube, 0–8 Levels |
| Relay Adjustment Range | 1–8 Levels |
| Max Relay Load | 30A/250VAC | 30A/30VDC |
| Dimensions | 77 × 70 × 26 mm |
| Weight | 75 g |
| Origin | Made in Mainland China |
Interface Guide
- VCC: Positive power supply (DC 12V +)
- GND: Negative power supply (DC 12V –)
- Level 1–8: Eight water level probe input terminals
- COM: Relay common contact
- NO: Relay normally open contact
Common Applications
- Home water tower automatic supply systems
- Aquarium and fish tank water change automation
- Automatic water tower filling and pumping
- Conductive liquid automatic control
- Poultry and livestock automatic watering systems
- Farm irrigation and water supply automation
- Solenoid valve, water pump, and motor automatic control
Important Notes
- Probe wire is not included — standard household insulated wire can be used to make probes.
- For safety, always use a DC power supply with good isolation.
- Minor color variations may occur due to screen differences. Allow ±1–10 mm measurement tolerance.
What's in the Box
- 1× Water Level Controller Relay Module
For guidance on safe electrical installation practices, visit the OSHA Electrical Safety resource page.
Frequently Asked Questions
Q: Does this water level controller relay come with probe wires?
A: No, probe wires are not included in the package. However, you do not need a dedicated probe — standard household insulated wire can be cut and used as probe sensors, making setup simple and affordable.
Q: What devices can this water level controller relay automate?
A: This 30A relay controller is capable of driving a wide range of devices including water pumps, solenoid valves, and motors. It is suitable for home water towers, aquarium water changers, farm irrigation systems, poultry watering setups, and any application requiring automatic liquid level management.
Q: How do I set the relay trigger level on this controller?
A: The relay ON and OFF trigger levels are independently adjustable across 8 levels (1–8). Simply configure the desired activation and deactivation thresholds using the onboard controls. The digital tube display shows the current liquid level in real time (0–8), making it easy to verify your settings.
Q: Is this controller safe for outdoor or farm use?
A: Yes, this controller is designed for versatile environments including farm water supply and aquaculture systems. Always use it with a properly isolated DC 12V power supply and ensure all electrical connections are protected from moisture to maintain safe operation.