| Scanner blocks for opposed, retro, diffuse, convergent, and fiber optic sensing modes; Most scanner blocks include Banner's exclusive, patented alignment indicating device system, which lights a top-mounted indicator LED whenever the sensor sees its own modulated light source, and pulses the LED at a rate proportional to the strength of the received light signal; Light source provides higher gain for reliable sensing of products of low reflectivity, while controlling sensing depth of field; Does not offer the same precision possible with visible light models; Good for sensing clear materials within the sensor's depth of field; Good for reliably counting the flow of radius products which are kept at a fixed distance from the sensor; 3 and 4 wire system |
