Turner Designs is very excited to announce FluoroSense -- the smallest, easiest to use handheld fluorometer for measuring in vivo chlorophyll. Its simple two-button keypad enables users to quickly power on the instrument and take a reading to estimate chlorophyll in almost any aquatic habitat. There is no warm-up time required -- chlorophyll µg/L estimates are displayed in seconds. The FluoroSense plastic molded enclosure boasts an extremely lightweight, small, waterproof design, while offering a high degree of durability. With a very low power draw, the FluoroSense can take over 10,000 measurements on a single pair of AA batteries. Factory calibrated, the only maintenance required is simply rinsing after use. The FluoroSense can estimate chlorophyll concentrations spanning the linear range from 0-199µg/L and resolve down to 1µg/L of chlorophyll. This is the ideal tool for quickly estimating in situ chlorophyll concentrations.