SMART SENSOR Digital Salinity Meter with Color Screen Display 0.00ppt-9.99ppt 10.0ppt-50ppt Seawater Pool Aquarium Fish Multifunction Salinity Gauge Electronic Waterproof Refractometer with ATC and Replaceable Probes This portable salinometer is an intellectual precise measurement apparatus. It designed and made with imported components and sensor, it have high sensitive and accuracy, stable to work with different temperature, small size for easy storage and hand carry. It can measure the salinity of a water sample and measure water's temperature under test. Salinometer widely applied in industrial, electrical and agriculture, medicine, food industrial, quality of drinking water, etc. It is very important that you read through this instruction before using this device to get the correct reading. Features: 【MEASURE RANGE】With 0.01ppt/0.1ppt resolution, 0.00ppt-9.99ppt/10.0ppt-50ppt salinity measuring range, °C/°F display, 0-60℃ solvent temperature compensation range. The temperature unit is °C/°F (switchable) to meet the needs of use in various environments. 【HIGH PRECISION】The advanced 2-in-1 smart pen combines salinity measuring and temperature measuring ,to achieve high accuracy, equipped with premium quality metal probe, and reliable automatic temperature compensation (ATC) ensures reading always be accurate at various temperatures. 【PROBES REPLACEABLE】 Hand-held design and non-slip pen handle for easy operation, configurable replaceable sensor probes - electrode probes can be replaced with a plug-in design for quick and easy replacement. 【EASY E】With LCD color screen display, the backlight can be switched for easy use in the dark. It will automatically shut down without any operation within 5 minutes. Features a hold function that saves measurements for convenient reading and recording. 【WIDE APPLICATION】The salinity meter is applicable to water source monitoring, aquaculture, environmental protection, laboratories, food processing, printing and dyeing, electroplating, beverage industry and scientific research units to determine water salinity. Specifications: Model: AR8212+ Material: ABS Salinity Mesuring Range: 0.00ppt~9.99ppt                                             10.0ppt~50ppt Resolution: 0.01ppt / 0.1ppt Accuracy: ±3% F.S ±1 digit Repeatability: ±0.01ppt / 0.1ppt Solvent Temperature Measurement Range: 0~60℃ Temperature Accuracy: ±1℃ Power Supply: 3.7V Li-ion Battery Display: Large color segment type LCD display Working Temperature Range: 0~50℃ Working Humidity Range: ≤85%RH (non-condensing) Item Size: 180 * 45 * 25mm / 7.08 * 1.77 * 0.98in Item Weight: 108g / 3.81oz Package Weight: 232g / 8.18oz Package Size: 22 * 9 * 5.5cm / 8.66 * 3.54 * 2.16in Package List: 1 * Salinity Meter  1 * USB Cable 1 * User Manual (English)