Esser 782444 Pressurized Air Curtain Lens Protector for 40/40 Series

Air curtain unit that protects the lens of 40/40 series flame detectors against soiling; used with devices coded 782431 and 782432. The static curtain created by pressurized air in front of the lens prevents oil vapor, sand, and dust particles from adhering to the glass surface. Since optical flame detectors in dirty areas must be wiped frequently, this unit significantly reduces the need to access the device.