MS140 Barcode Slot Reader The MS140 family of bar code slot readers is a flexible, cost effective solution when you demand a reliable and rugged slot reader. With a resolution of up to 6 mils (0.15 mm), the MS140 is capable of reading any bar coded identification badge. It's sealed optical system is available in both visible light or infrared. The infrared units ensure accurate reading of either visible and laminated badges. Its water resistant base and rugged housing make the MS140 a popular choice in any environment. An optional mounting bracket is available to safely secure the unit in any direction.