Features: In order to prevent particles and sundries from entering the Sensors, a filter screen must be installed at the water inlets of the Sensors. The installation of water Flows Sensors should be inside the equipment or indoors, and it should not be expose to outdoor or humid and high temperatures for long time. The installation of water Flows Sensors should avoid the environment and application of vibration and shaking, so as not to affect the measurement accuracy of the Sensors. When the magnetic material or the material that generates magnetic to the Sensors is close to the Sensors, its characteristics may change. Please do not disassemble water Flows Sensors without authorization to prevent damage. This structural Sensors have not been used before, so there may be some discomfort when it is used for direct replacement, so please raise it in time. Specifications: Interfaces size: G1/2 Working voltages ranges: DC3.5-24V Inner diameter/outer diameter: 10.9mm/20mm Screw tooth length: 14.5mm 12.5mm Water pressure resistance: 1.75MPa Output pulse high level: > DC4.7V (input voltages DC5V) Low level of output pulse: < DC0.5V (input voltages DC5V) Insulation resistance: > 100MQ Flows Ranges: 1-30LIMIN Note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item. Package includes: 1Pc Water Flower Sensors