... has good immunity 4.Durable life 1.Basic introductionSNQ0820 series, sensor section size is 53 ×35,structure compact,beautiful outlook ... -dimensional garage, and other dangerous area's protection.SNQ0820 series,direct transmission type, protective height 140mm,protective range :2 ... sides protection<=6000mm,3 sides<=4000mm2.SNQ series's specificationProtection range,2 sides protection<=6000mm,3 sides ...