Features: Impact resistance: The product is packed well, free fall from the 50cm height X, Y, Z direction to the concrete surface without abnormality, within 10% of the accuracy change. Insulation resistance: The insulation resistance between the Hall sensor lead wire and the valve body is 100 M or more. (DC 500V). Heat resistance: placed in 80 3 C environment for 72h, return to normal temperature 1-2h without abnormalities, and parts without cracks, slack, expansion, deformation and other phenomena. Cold resistance: It is placed in the environment of -203C for 72h, returning to normal temperature for 1-2h without abnormality, and the parts have no crack, slack, expansion and deformation. Insulation withstand ability: The Hall sensor lead wire and the valve body are pressurized by AC600V (50/60Hz) for 1 second without insulation abnormality. Moisture resistance: After being placed at 603C and relative humidity of 90%~95% RH for 72h, the insulation resistance is above 1M. Pulling strength: Apply 10N pulling force for 1 minute on the lead-out line, without loosening or breaking. Thermal shock resistance: placed in an environment of 803C for 1h, then placed directly in the environment of -203C for 1h for a cycle, a total of 10 cycles, no cracks, slack, expansion, deformation, etc. phenomenon. Specification: Thread: G1/2 Male-Male Flow Rate Range:1~30L/min Voltage: DC5V Flow Rate:1~30L/min Accuracy:5% Maximum Working Current: 15mA(DC5V) Working Voltage Range:5~18V Working Temperature Range:0~120(Without Ice) Working Humidity Range:35~90%RH(No frosting) Pressure Allowed:DC4.3V(Input DC5V) Output Pulse Low Level: