Chlorine ph Cl2 tester: It is an ideal tool for quickly and accurately measuring ph and chlorine, keeping swimming pools or hot springs in a safe chlorine and ph range. An electric tester for ph and chlorine (Cl2) levels for routine monitoring of ph and chlorine levels in swimming pools, spas and various water sources. When chlorine and ph come in a rush, it can cause diarrhea and ear and skin infections. Good chlorine and good pH keeps bad bacteria at bay: if the pH is too high, the electricity killed by the chlorine will be used up. When large amounts of nitrogen (feces, urine, sunscreen, or sweat) or other organic substances enter the pool, chlorine will also be consumed. That's why it's tested for chlorine and pH. Note: With the exception of swimming pool or spa water, it is not recommended to immerse the detector in water. Specification: The recommended chlorine content for swimming pools and spas is 1.2 to 1.7 ppm Recommended pH for swimming pools and spas is 7.2 to 7.8 Size: Main Unit: 190mm x 20mm Handle Probe: 150 mm long Probe (limited to): 48 mm long Cable (only): 300 mm long Power supply: 1 aa alkaline battery (1.5v) Bare metal weight: 193 gb (without battery) Gross weight: 260g Including package size: 200*150*63 1 pH and Cl2 probe tester 1 manual, 1 sheet of sandpaper, color box packing