Features: 1. Designed for monitoring liquid level in pool, well, water tower, reservoirs, tanks, etc. 2. You can set water draining mode and water supply mode. 3. Adjustable sensitivity by a knob (5-100kΩ). 4. Adjustable action time delay (0.1-10S). 5. Relay status is indicated by LED. 6. With small volume, 35mm DIN rail mount. Specification: Model: GRL8-02 Function: 2 or 1 level control mode Power terminal: A1-A2 Rated power supply voltage: AC/DC 24-240V(50-60Hz) Power consumption: Max. 2VA Sensitivity adjustment range: 5-100kΩ Supply voltage tolerance: -15%; +10% Voltage in electrodes: Max. AC 5V Current in electrodes: Max. 0.1mA Response time: Max. 400ms Electrode cable allows distributed capacitance (maximum): 800nF-100nF Electrode cable length: ≤100m Action delay time: 0.1s-10s (adjustable) Setting accuracy: 10% Output contact parameters: 1 x SPDT, 10A/AC1, 250VAC/24VDC Minimum switching power: 500mW Power indicator: Green LED Output indication: Red LED Mechanical life: 1x107 Electrical life(resistive load): 1x106 Reset time: Max 200ms Working temperature: -20℃~55℃ Mounting method: 35mm DIN rail Mounting