PH/CL2 Water Quality Tester - This device measures pH and chlorine levels in swimming pools, spas, saunas, and aquariums. Features a large, easy-to-read display with high accuracy. Compact and lightweight for portability. Note: Requires 1.5 PPM CL standard solution (not included) for chlorine measurement. Measurement Range: - Safe chlorine level: 1.2-1.7 ppm - Safe pH level: 7.2-7.8 Construction: Durable plastic casing. Powered by 1 AA 1.5V battery (not included). Storage: 1. Turn knob to OFF (PH position) when not in use. 2. Keep in a cool, dry place away from sunlight. 3. Only immerse test rod in pool or spa water. Dimensions: approx. 7.1"x4.6"x1.2" Weight: 220g Usage Instructions: 1. pH Measurement (no battery): - Turn knob to PH until it clicks. - Clean metal rod with sandpaper, rinse, and dry before use. - Insert into neutral solution; wait 3-5 minutes for reading. 2. Chlorine Measurement (battery required): - Install battery, turn knob to CL. - Insert rod into 1.5 PPM CL standard solution. - Adjust knob until pointer matches known CL value. - Remove rod and note adjustment point (A-E). - Reinsert into test water; wait 3-5 minutes for reading. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store