Cost Effective Plastic 18 mm Barrel - Advanced ASIC (Application Specific Integrated Circuit) technology is resistant to fluorescent light and offers a higher level of crosstalk avoidance - Powerful and bright visible red emitter beam for easy alignment and set-up - Highly visible output, dual-function power and stability indicators - Wide operating temperature range: -40 to +70° C - Robust 250° sensitivity potentiometer on diffuse models - Cost-effective ABS plastic housing is well sealed against water ingress - Available in Emitter/Receiver, Polarized Retroreflective, Retroreflective, Diffuse, and Fixed Field models.