... .Max.protection height: 1740mm.Perfect self-checking.Perfect interference immunity.Long-lasting,high reliability.Strong universality,easy to align.Fast response ... ≥5°)Light Source : infrared,940nmHousing : Aluminum alloy,PCSealing: IP65Light Pitch: 10mm,20mm,40mm,80mmProtection Range: 400~3500mmProtection Height (xx-1)×pitch,xx-beams Infrared Light ...