Features:1. Designed for monitoring liquid level in pool, well, water tower, reservoirs, tanks, etc.2. Adjustable sensitivity by a knob (5-100k).4. Stable performance, long service life.5. Relay status is indicated by LED.6. With small volume, 35mm DIN rail mount. Specification:Model: GRL8-01Function: 2 level control modePower terminal: A1-A2Power consumption: Max. 2VASensitivity adjustment range: 5-100kCurrent in electrodes: Max. 0.1mAResponse time: Max. 400msElectrode cable allows distributed capacitance (maximum): 400nF-100nFElectrode cable length: 100mSetting 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. 70g/2.5ozPackage 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..