The ultimate on-site hand-held pool and spa photometer. It measures nine pool & spa tests directly on a digital display. Test factors include Free Chlorine, Total Chlorine, Bromine, pH, Alkalinity, Calcium Hardness, Cyanuric Acid, Iron, and Copper. As a bonus, the ColorQ® 2x PRO 9 photometer can also test Biguanide (Order Code 3919-G) and Biguanide Shock (Order Code 6930A-J) with optional reagents sold separately. The kit features economical liquid reagents along with easy to use TesTabs® tablets, and a Pool Manager Handbook. The ColorQ® 2x eliminates the need to visually determine slight colour variations or use look-up tables, thus taking the guesswork out of poolside water analysis. The ColorQ® 2x PRO 9 and reagents are packaged in a rugged carrying case for on-site testing. Test Factor Range # of Tests Free Chlorine (DPD) 0-10 ppm 144 Total Chlorine (DPD) 0-10 ppm 144 Bromine (DPD) 0-22 ppm 144 pH 6.5-8.5 144 Total Alkalinity 0-300 ppm 100 Calcium Hardness 0-600 ppm 100 Cyanuric Acid 0-150 ppm 100 Iron 0-3.0 ppm 100 Copper 0-4.0 ppm 100 Biguanide (Sold Separately) 0-70 ppm — Biguanide Shock (Sold Separately) 0-160 ppm —