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 (5-100k).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: GRL8-02Function: 2 or 1 level control modePower terminal: A1-A2Rated power supply voltage: AC/DC 24-240V(50-60Hz)Power consumption: Max. 2VASensitivity adjustment range: 5-100kSupply voltage tolerance: -15%; +10%Voltage in electrodes: Max. AC 5VCurrent in electrodes: Max. 0.1mAResponse time: Max. 400msElectrode cable allows distributed capacitance (maximum): 800nF-100nFElectrode cable length: 100mAction delay time: 0.1s-10s (adjustable)Setting accuracy: 10%Output contact parameters: 1 x SPDT, 10A/AC1, 250VAC/24VDCMinimum switching power: 500mWPower indicator: Green LEDOutput indication: Red LEDMechanical life: 1x107Electrical life(resistive load): 1x106Reset time: Max 200msWorking temperature: -20~55Mounting method: 35mm DIN railMounting altitude: 2000mWiring capability: 1x2.5mm2 or 2x1.5mm2Dimensions: 90*18*64mm / 3.54*0.71*2.52inWeight: Approx. 82g/2.9ozPackage List:1 * Liquid Level Control RelayNote: 1. Due to the difference between monitors and light effects, the pictures may not reflect the actual color of the item.2. Please allow slight error due to manual measurement. Thanks for your understanding.