Ensure precise measurement of Oxidation Reduction Potential (ORP) levels with this professional pen-type ORP meter, designed for reliable and instant water quality testing. This compact and portable device accurately measures the tendency of a solution to gain or lose electrons, making it ideal for applications in aquariums, pools, hydroponics, spas, and various other water systems. Key Features: · Accurate ORP Measurement: Measures ORP levels within a range of -1999mV to 1999mV with a resolution of 1mV and an accuracy of ±5mV, providing dependable results for water quality monitoring. · Clear LCD with Backlight: Features a bright, easy-to-read LCD display with backlight, allowing convenient operation even in low-light environments. · Compact and Portable Design: Miniature pen-style construction with dimensions of 14.8 x 2.6 x 1.4cm and weighing only 37.4g, making it easy to carry and use on the go. · User-Friendly Operation: Simple one-button operation offers instant display of measurement results, suitable for both professionals and hobbyists. · Wide Application Range: Perfect for testing water quality in aquariums, swimming pools, hydroponic setups, spas, environmental water monitoring, and other water sources. · Durable ABS Material: Constructed from sturdy ABS plastic to ensure long-lasting use in various testing environments. · Battery Operated: Powered by two 3V CR1632 button cell batteries (not included), providing portable and convenient power supply. Specifications: · Color: Yellow · Material: ABS · ORP Range: -1999mV ～ 1999mV · Resolution: 1mV · Accuracy: ±5mV · Operating Temperature: 0℃ ～ 50℃ (32°F ～ 122°F) · Battery: 2 × 3V CR1632 button cell batteries (not included) · Item Size: 14.8 x 2.6 x 1.4 cm (5.8 x 1.0 x 0.6 inches) · Item Weight: 37.4g (1.3oz) Package Includes: · 1 x ORP Meter (Battery not included) · 1 x User Manual · 1 x Mini Screwdriver This pen-type ORP meter combines accuracy, portability, and ease of use, making it an essential tool for monitoring the oxidation-reduction potential in various water systems, ensuring safe and optimal water quality conditions at all times.