FLIR Commercial Systems Inc - Extech Instruments 9 Townsend West , Nashua , NH 03063 USA About Solutions products services Publications videos Downloads Companies FLIR Commercial Systems Inc - Extech ... Videos 42509 Product Video 42509 Product Video 0 Share An introduction to the 42509 Color Alert Infrared Thermometer. This Dual Laser IR Thermometer has High/Low Alarms with a visual and audible indicator when the temperature exceeds or goes below the set temperature. Most popular related searches infrared thermometer IR thermometer thermometer Customer comments No comments were found for 42509 Product Video. Be the first to comment! Add your comment Publish your comment Great! comment successfully added!