| Brand | MV Switchgear Accessories |
| Model NO. | GRL8-03 Liquid Level Control Relay |
| Rated frequency | 50/60Hz |
| Series | GRL8 |
Automated Water Level Control: Maintains optimal water levels by starting and stopping the pump based on preset minimum and maximum thresholds.
Pump Protection: Adjustable sensitivity (5kΩ to 100kΩ) prevents dry-running by detecting low water levels, extending pump lifespan.
Manual Start Option: External start button provides flexibility for manual pump operation when needed.
Wide Voltage Compatibility: Galvanically separated supply voltage (AC/DC 24V-240V) ensures safe and versatile operation.
Real-Time Monitoring: Green and red LED indicators offer clear feedback on relay status and water shortage alerts.
Space-Saving Design: Compact dimensions (18mm W x 64mm D x 90mm H) and DIN-rail mounting make installation a breeze.
The GRL8-03 liquid level control relay is a specialized device engineered for precise water level management in applications such as water towers, wells, and storage tanks. This compact, DIN-rail mountable relay ensures a consistent water supply by automatically controlling water pumps based on real-time level data. Whether you’re managing an industrial facility or a residential water system, the GRL8-03 offers advanced features like adjustable sensitivity, galvanically separated supply voltage, and pump protection to deliver reliable performance and operational efficiency.
Voltage Range: AC/DC 24V-240V, 50/60Hz
Supply Voltage Tolerance: ±10%
Sensitivity (Input Resistance): Adjustable, 5kΩ to 100kΩ
Voltage in Electrodes: Max AC 1V
Current in Probe: AC <1mA
| Model | GRL8-03 |
| Function | well-tank level contorl |
| Supply terminals | A1,A2 |
| Voltage range | AC/DC 24-240V(50-60Hz) |
| Input | max .2VA |
| Supply voltage tolerance | -15%;+10% |
| Sensitivity(input resistance） | adjustable in range 5 kΩ -100 kΩ |
| Voltage in electrodes | max. AC 5 V |
| Current in probe | AC <0.1 mA |
| Time response | max. 400 ms |
| Max. capacity length | 800 m (sensitivity 25kΩ), 200 m (sensitivity 100 kΩ) |
| Max. capacity of probe cable | 400 nF (sensitivity 25kΩ), 100 nF (sensitivity 100 kΩ) |
| Supply indication | Green LED |
| Accuracy in setting(mechanical) | ≤10 % |
| Output | 1xSPDT |
| Current rating | 10A/AC1 |
| Switching voltage | 250VAC/24VDC |
| Min. breaking capacity DC | 500mW |
| Output indication | Red LED |
| Mechanical life | 1*107 |
| Electrical life(AC1) | 1*105 |
| Reset time | max.200ms |
| Operating temperature | -20℃ to +55℃（-4℉ to 131℉） |
| Storage temperature | -35℃ to +75℃（-22℉ to 158℉） |
| Mounting/DIN rail | Din rail EN/IEC 60715 |
| Protection degree | IP20 terminals |
| Operating position | any |
| Overvoltage category | III |
| Pollution degree | 2 |
| Max. cable size(mm²) | solid wire max.1×2.5or 2×1.5/with sleeve max.1×2.5(AWG 12) |
| Dimensions | 90x 18x 64mm |
| Weight | 80g |
| Standards | EN 60255-1 |
