This inexpensive ultraviolet crosslinker makes it possible to identify and analyze trace amounts of DNA/RNA with great sensitivity, accuracy and speed. The Select XLE-Series UV crosslinker has a unique true-UV-monitoring circuitry that safeguards valuable test results from washouts, even when the tubes age. This instrument will eliminate PCR contamination, nicking ethidium-bromide-stained DNA in agarose gels, gene mapping for creating cleavage-inhibiting thymine dimers, RecA mutation screening in E.coli, UV sterilization and miscellaneous UV-dosage applications. It features a user-friendly, fully programmable microprocessor, built-in help messages and an auto-repeat function that make its operation fast and simple. It features five 8-watt tubes and is available in a choice of 254nm, 312nm and 365nm versions.