Designed for monitoring level in , basins, reservoirs, tanks. In one device you can choose the following configurations:2 level control mode, 1 level control mode. Choice of function PUMP UP, PUMP DOWN. Sensitivity adjustable by a potentiometer (5-100kΩ). Relay status is indicated by LED. Adjustable time delay on the output (0.1 - 10s). Galvanically separated supply voltage 24-240V. size: 90 x 18 x 64MM Material: ABS colour: white Package Contents: 10 x Relay 10 x Instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.