Multifunctional water quality tester for measuring pH, salinity, ORP, chlorine, EC, FAC, and temperature in swimming pools. Suitable for drinking water, aquaculture, fish tanks, modern agriculture, wastewater treatments, river water quality test, etc. It can also be used to measure the Chlorine content in Swimming Pool, Spa, Hot Spring.  Features: 7in1 Chlorine Meter: Multifunction water quality tester for measuring pH, salinity, ORP, chlorine, EC, Total Dissolved Solids, and temperature in swimming pools. Accurately measures the residual chlorine levels to keep pool or spa chlorine levels within safe limits. Highly Sensitive Probe: Adopts highly sensitive electrode probe, plugin design, removable and replaceable. Convenient operation, just put the probe into the water for a few seconds, easy to measure the value of FAC (Chlorine) PH, ORP, SALT, Total Dissolved Solids, EC, TEMP.  High Accuracy: Temperature measurement design also has an automatic temperature compensation function, which can ensure the most accurate measurement for you in the ambient temperature ranges. celsius degrees F unit conversion.  Multifunctional Design: LCD display, you can see the measurement data clearly. Support data hold, one button to lock reading function, you can check the data at any time. With automatic calibration, you can restore the measurement accuracy by yourself.  Wide Applications: Suitable for drinking water, aquaculture, fish tanks, modern agriculture, wastewater treatments, river water quality tests, etc. It can also be used to measure the chlorine content in swimming pools, spas, and hot springs.  Specifications: Name: 7in1 Chlorine Meter Material: ABS Battery: 4 * 1.5V button cells (not included) FAC test ranges: 0.14.0ppm PH test ranges: 0.014.0ph ORP test ranges: 999mv ~+999mv CL test ranges: 0.04.0mgL Salt test ranges: 010000ppm, 10.1200.0ppt, 0.01percent 25.00percent EC test ranges: 010000usc m , 20.1400.0mSc m,10.01 19.99mSc m  Total Dissolved Solids test ranges: 010000ppm, 10.1200.0ppt Temperature test ranges: 0.1 celsius 60.0 celsius 32.0 Fahrenheit 140.0 Fahrenheit Item size: 183 * 42 * 42mm 7.20 * 1.65 * 1.65in Package size: 230 * 123 * 56mm 9.06 * 4.84 * 2.20in Package weight: 400g 14.11ounce Packing List: 1 * 7in1 Chlorine Meter