Environmentally friendly and highly accurate, the economical and user friendly FCLA7000 eXact 7 Photometer from Sensorex is EPA-compliant for regulatory testing and carries the CE mark. It comes with 1000 test strips to perform free chlorine tests at 0-6ppm. The photometer can also utilize the company’s HR strips to test from 6-11 ppm or an additional glycine strip to bind chlorine for chlorine dioxide measurement. It utilizes a 525 nm LED light source to deliver high accuracy measurement of free chlorine from 0-11 ppm or chlorine dioxide at 0-6.5 ppm with photometric precision of ± 0.1/0.01%T and transmission range of 100-0.00%T. Operational temperature range spans 0 to 50°C. A three-digit customized LCD with annunciators automatically displays 0.01 or 0.1 resolution. The photometer can perform >2000 tests without having to replace its 4 AAA Alkaline batteries. It features EMC of emitted interference to EN 61326 and immunity of interference to EN 61326. In addition to field spot testing, the device provides fixed calibration support for the company’s FCL400 series free chlorine sensor and the CLD400 series chlorine diode sensor.