Contrast Sensor Boasts 50 Gray-Scale Levels

With the ability to reliably detect up to 50 gray-scale levels, the CNTX contrast sensor sports the highest resolution among white LED contrast sensors in the marketplace, according to its manufacturer. In addition, the sensor’s round spot allows it to be mounted in any orientation. Contrast sensors with rectangular light spots can be mounted in only one direction—parallel to the mark on the target. Unlike many other sensors, the CNTX has a two-digit display that shows the values of a background and a mark to indicate available switching margin. Most contrast sensors have only a red and green LED, which provide little information. Also unlike other contrast sensors, the CNTX can lock the controls so the operator cannot change the settings and cause errors. The output is automatically configured to PNP or NPN upon power-up, aiding in setup. The light source intensity is variable so it can be adapted to the background. The CNTX sensor is available within three weeks after receipt of an order. List price for one sensor is $300, with volume discounts available. EMX INDUSTRIES INC., Cleveland, OH. (800) 426-9912.