Material The pH meter is made of high-quality plastic, durable and sturdy. And it has a large screen that displays the pH and chlorine level test result for easy and accurate reading. Description The pH value is one of the most important factors in pool water balance and should be tested and corrected at least weekly. The pH value is the measure of the acidity/alkalinity of the pool water. Chlorine, which kills bacteria, algae, and microorganisms. It cannot be used in salt water. Note Too little chlorine leads to the growth of algae and bacteria, waterborne diseases, cloudy water, and poor water hygiene. Too much chlorine can cause irritation to the eyes, nose, and skin. Also remember that chlorine in the pool is carcinogenic and we must strive to keep its level at the minimum necessary for complete disinfection. Wide ApplicationThe pool pH test is widely used for measuring drinking water, aquariums, swimming pools, tap water, hydroponics, spas, laboratories and scientific testing. Applicable ObjectsThe pool water tester is specially designed for family-sized swimming pools or spas. The pH tester is the ideal small tool for pH testing applications at home and in the laboratory. Features: Made of premium plastic, durable and sturdy. A practical tool for testing water pH and chlorine level for swimming pool and spa. Easy to use, you can quickly test whether the chlorine and pH are within the ideal range. Large screen displays the test result on pH and chlorine level for easy and accurate reading. Specially designed for a family swimming pool or spa. Specifications: Material: Plastic. Weight: 298g. Main Body Size: 190 x 20mm. Probe Length: 150mm. Probe Length: 48mm (without the black belt). Cable Length: 300mm. Power Supply: 1 x AA 1.5V Alkaline Battery (Not Included). Package Included: 1 x Chlorine CL2 & pH Analyzer with Probe. Note: 1. You must prepare a 1.5 PPM chlorine solution in the pool water for calibration. 2. If you are unsure whether the chlorine level is 1.5 PPM (or if you cannot find a calibration point), use a traditional test strip. 3. Once the pool has been calibrated, there is no need to recalibrate unless it is changed to use different pool water to maintain another pool.