Digital Residual Chlorine Tester Pen, High Precision Water Quality Meter with ATC & Backlit LCD, Portable Free Chlorine Measurement Tool for Swimming Pools, Drinking Tap Water and Wastewater

• Versatile & Comprehensive Testing: Accurately measures total residual chlorine in aqueous solutions, including free chlorine (CI2), hypochlorite (OCI-), and chloramine T. Ideal for monitoring water quality in drinking water, cooling towers, and industrial or domestic wastewater.
• HD LCD Dual Display with Backlight: Equipped with a high-contrast LCD screen that simultaneously displays chlorine (CL) levels and temperature. The built-in backlight ensures clear and easy-to-read results, making night-time or low-light reading a breeze.
• Automatic Temperature Compensation (ATC): Features advanced ATC technology for precise readings regardless of water temperature variations. Easily switch between °C and °F (0.0-60.0°C / 32.0-140.0°F) to suit your preference. The built-in temperature sensor reacts faster and more accurately than direct contact measurement.
• Replaceable High-Sensitivity Probe: Designed with a premium, high-sensitivity electrode for instant and highly reliable measurements. The convenient plug-in probe is fully detachable, allowing for easy replacement to extend the lifespan of your tester.
• Pocket-Sized & Ready to Go:Made of resistant white ABS material, this compact digital pool water tester easily fits in your pocket. Perfect for on-the-go outdoor use, testing home tap water, alkaline water, or effectively managing swimming pool water quality anytime, anywhere.

Parts List: 1×Test Pen 1×Instruction Manual Description : This residual chlorine tester can test for total residual chlorine in aqueous solutions , including free chlorine (Cl₂) , hypochlorite (OCI⁻) , and nitrogenous chlorine compounds (such as chloramine T) . It features a high definition LCD dual display and is easy to use . Features : 【Portable Size】This residual chlorine water quality detector pen is compact and portable , easily fitting in a pocket . Specification : Product Name : Residual Chlorine Water Quality Detector Pen Material : ABS Size : 18.4×4.5 cm/7.24×1.77 inch Battery Type : Button Cell (4 cells) Battery Specifications : 4×1.5V (LR44) Measuring Range : CL : 0-4.00 ppm , Temperature : 0-60°C/32-140°F Operating Temperature : 0-60℃ Applications : Widely used in drinking water, sewage treatment , water purification , aquariums , aquaculture , swimming pools , hydroponics , and other fields . Color : White