VL-LLR-RY8-M(G)(P)(GP) — Liquid Level Control Relay
The liquid level control relay is designed for automatic water supply, drainage, and water shortage protection in different applications such as pools, water towers, wells, and pump control systems.
It supports AC/DC 85–265V power supply and provides multiple functions, including drainage control, water supply control, and water shortage protection. With two-stage liquid level control, adjustable sensitivity, and real-time LED status indication, it ensures reliable monitoring and control of liquid levels.
Its compact 18mm design supports standard 35mm DIN rail installation, making it easy to install in control panels and distribution cabinets.
Key Features
- Water-supply (G), drainage (P), switchable supply/drainage (GP) and combined dual-pool (M) variants
- Two-stage liquid level control with adjustable sensitivity (5–100kΩ, G/P/GP types)
- Wide supply voltage AC/DC 85–265V
- Response time under 500ms
- Compact 18mm width, standard 35mm DIN rail installation
Technical Specifications
| Model | RY8-G | RY8-P | RY8-GP | RY8-M |
|---|---|---|---|---|
| Function | Water supply | Drainage | Supply/drainage switchable | Supply + drainage + shortage protection, dual-pool control |
| Sensitivity adjustable | Yes | Yes | Yes | No |
| Operating voltage | AC 85–265V (50–60Hz) / DC 85–265V | |||
| Control probe leads | < 100cm | |||
| Response time | < 500ms | |||
| Sensitivity adjustment range | 5–100kΩ (not supported on M type) | |||
| Contact capacity | 10/16A, AC1-resistive | |||
| Mechanical life | 1×10⁵ (resistive load, 1s on / 9s off) | |||
| Environment | Working -10 to 55°C, ≤50% RH, ≤2000m · Storage -20 to 75°C |
Applications
Automatic water supply, drainage and water-shortage protection for pools, water towers, wells and pump-control systems.
Downloads
Technical documentation for this product (datasheet, type-test report, CAD drawing) is being finalized and will be published here shortly. Need it sooner? Contact us via the Request a Quote form and our team will send it directly.
Packaging & Logistics
Packaging details, minimum order quantity, lead time and HS code for this product are being finalized and will be published here shortly. Need this information sooner? Contact us via the Request a Quote form.

