Feature: 1. Accurate and Reliable: Water quality tester pen meter not only ensures stable performance but also contributes to exceptional accuracy, making it a trustworthy water quality tester. Made of ABS material, long term use. 2. LCD Screen Display: Large LCD screen display helps you see the measurement clearly in any situation, clear numbers for easy reading. The LCD screen ensures data is easy to read and understand. 3. High Sensitivity Probe: Water quality tester with high sensitivity electrode probe provides high accuracy water quality testing with automatic temperature compensation, reducing errors. 4. Multi Function: Automatic temperature compensation, accurate measurement, large LCD screen, easy function switching, automatic shutdown, simple operation. The device offers various functions for convenient use. 5. Sealed Gasket Design: The battery cover is designed with a sealed gasket, providing good waterproof seal performance and durability. The device is built to withstand water exposure. Specification: Item Type: Water Quality Tester Material: ABS Weight: Approx. 131.00g / 4.62oz Detection Range: CL₂ TEMP Applicable Industries: Swimming Pool, Spa, Water Plant Laboratory, Aquaculture, Food Processing Plant, Others Size: Approx. 185mm / 7.28in Battery (Not Included): 3 x Button Battery LR44 Waterproof Level: IP65 Operating Environment: 0-60℃ (32.0-140.0℉) RH: 100% Backlight: LCD Backlit Display Auto Shut off: 5 Minutes Display Mode: LCD Digital Display CL₂: Measurement Range: 0.01-4.00ppm (Total Amount) Resolution: 0.01ppm Accuracy: ±10% of Reading, ±0.01ppm Temperature Compensation: (0-60)℃ (Automatically) TEMP (Temperature): Measurement Range: 0-60℃ Resolution: 0.1℃ Accuracy: ±0.1℃ . Package List: 1 x Water Quality Tester 1 x User Manual Note: Maintenance: After the test is completed, shake off excess water, keep the motor clean. If not in use for a long time, please remove the battery and cover the electrode protection sleeve.