5in1 Chlorine Meter: Multifunctional water quality tester designed to measure pH, ORP, chlorine, H2, and temperature in swimming pools. Accurately measures residual chlorine levels to help maintain safe pool or spa water conditions. Highly Sensitive Probe: Features a sensitive electrode probe with a plug-in, removable, and replaceable design. Simple operation—immerse the probe in water for a few seconds to quickly measure chlorine, pH, ORP, H2, and temperature. Provides accurate measurement results. High Accuracy: Equipped with automatic temperature compensation for precise readings across varying ambient temperatures. Supports ℃/°F unit conversion for added convenience. Multifunctional Design: Large LCD screen with backlight ensures clear visibility of data. Includes data hold function to lock readings with one button press for easy review. Offers automatic calibration to restore measurement accuracy when needed. Wide Applications: Suitable for use in drinking water, aquaculture, fish tanks, agriculture, wastewater treatment, and river water quality testing. Can also measure chlorine levels in swimming pools, spas, and hot springs. Note: All readings are taken after automatic temperature compensation. Specifications: Name: 5in1 Chlorine Meter Material: ABS Battery: 3 x 1.5V button cells (not included) pH Test Range: 0.00–14.00 pH ORP Test Range: 0.00–1999 mV Chlorine Test Range: 0–4 mg/L H2 Test Range: 0–10000 ppb Temperature Test Range: 0°C–60°C / 32°F–140°F Item Size: 186 x 38 x 23 mm / 7.32 x 1.50 x 0.91 in Package Size: 210 x 80 x 50 mm / 8.27 x 3.15 x 1.97 in Package Weight: 160 g / 5.64 oz Packing List: 1 x 5in1 Chlorine Meter