The Modline 5 standalone infrared thermometer handles harsh applications common in foundries, steel mills, furnaces, induction heating and other high-temperature manufacturing environments. The sensor has a stainless steel, NEMA 4 rated housing to protect against corrosion and humidity. The sensor is set up through a rear panel keypad with backlit display or via RS-485 from the Ircon digital Panel Meter or any other RS-485 device. An optional Dirty Window Detector (patent #5812270) senses if dirt, water and other contaminants are built up on the sensor window.