GL-ES-IR/115/120. Photoelectric slot sensor. Infrared light source. Not sensitive to ambient light. High switching frequency. Robust and insensitive to ambient interference. Tolerant to supply voltage variations up 60 V DC. 500 V isolation from earth. Suitable for hazardous area. Up to SIL 3 acc. to IEC/EN 61508. Self configuration in redundant systems. Permanently self-monitoring